Non-destructive determination method, system, equipment and medium for Young's modulus of bulk alloy

Abstract

The present invention discloses a non-destructive determination method, system, device and medium for the Young's modulus of a bulk alloy, relating to the technical field of alloy detection. The method includes: performing Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; the alloy spectrum includes Rayleigh surface waves and body waves; the body waves include shear waves and longitudinal waves; performing Lorentz fitting on the alloy spectrum to obtain the Rayleigh surface wave frequency shift and the body wave frequency shift; calculating the Rayleigh surface wave sound velocity and the body wave sound velocity according to the corresponding relationship between the sound velocity and the dispersion relationship, the law of conservation of momentum, the Rayleigh surface wave frequency shift and the body wave frequency shift; determining an independent elastic coefficient matrix according to the Rayleigh surface wave sound velocity and the body wave sound velocity; and calculating the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula. The present invention can improve the accuracy of Young's modulus detection without damaging the sample.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy detection, in particular to a non-destructive determination method, system, device and medium for the Young's modulus of bulk alloys. Background Art

[0002] With the continuous development of science and technology, the development speed of global manufacturing and aerospace has accelerated. Continuously improving the mechanical properties of alloys has become an inevitable trend to promote scientific and technological progress. Therefore, it is necessary to accurately measure the mechanical properties of alloys. As one of the important parameters for studying the mechanical properties of materials, from a macroscopic perspective, Young's modulus describes the ability of an object to resist elastic deformation. From a microscopic perspective, it reflects the binding strength between atoms, ions or molecules.

[0003] Currently, the commonly used methods for detecting the Young's modulus of alloys mainly include calculating the Young's modulus of metallic materials through the stress-strain curve obtained from tensile tests, and obtaining the Young's modulus through nanoindentation that depends on the indenter geometry. However, both of the above methods have the following problems: All current testing methods for the Young's modulus of bulk alloys will cause varying degrees of damage to the samples. No completely non-destructive testing method has been found yet. Moreover, the Young's modulus of alloys is mostly calculated through the stress-strain curve obtained from tensile tests. The testing method is relatively traditional and has high requirements for the size of the material. Therefore, it is currently impossible to improve the detection accuracy without damaging the sample. Summary of the Invention

[0004] The object of the present invention is to provide a non-destructive determination method, system, device and medium for the Young's modulus of bulk alloys, which can improve the accuracy of Young's modulus detection without damaging the sample.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A non-destructive determination method for the Young's modulus of bulk alloys includes:

[0007] Performing Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; the alloy spectrum includes Rayleigh surface waves and body waves; the body waves include shear waves and longitudinal waves;

[0008] Performing Lorentz fitting on the alloy spectrum to obtain Rayleigh surface wave frequency shift and body wave frequency shift;

[0009] Calculating the Rayleigh surface wave sound velocity and body wave sound velocity according to the corresponding relationship between the sound velocity and the dispersion relationship, the law of conservation of momentum, the Rayleigh surface wave frequency shift and the body wave frequency shift;

[0010] Determining an independent elastic coefficient matrix according to the Rayleigh surface wave sound velocity and the body wave sound velocity;

[0011] Calculate the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula.

[0012] Optionally, calculating the Rayleigh surface wave velocity and the body wave velocity according to the correspondence between the sound velocity and the dispersion relationship, the law of conservation of momentum, the Rayleigh surface wave frequency shift, and the body wave frequency shift specifically includes:

[0013] Determine the wave vector of the body wave according to the conservation of momentum and the waveform parameters of the body wave; the waveform parameters include the angle between the incident light and the scattered light, the refractive index, and the incident light wavelength;

[0014] Determine the wave vector of the Rayleigh surface wave according to the conservation of momentum, the incident angle of the Rayleigh surface wave, and the incident light wavelength;

[0015] Calculate the Rayleigh surface wave velocity and the body wave velocity according to the correspondence between the sound velocity and the dispersion relationship, the wave vector of the body wave, the wave vector of the Rayleigh surface wave, the Rayleigh surface wave frequency shift, and the body wave frequency shift.

[0016] Optionally, determining the independent elastic coefficient matrix according to the Rayleigh surface wave velocity and the body wave velocity specifically includes:

[0017] Determine the crystal structure of the target bulk alloy;

[0018] Determine the independent elastic coefficient matrix according to the crystal structure, the Rayleigh surface wave velocity, and the body wave velocity.

[0019] Optionally, determining the independent elastic coefficient matrix according to the crystal structure, the Rayleigh surface wave velocity, and the body wave velocity specifically includes:

[0020] Determine the number of independent elastic coefficients according to the crystal structure;

[0021] Calculate each independent elastic coefficient according to Hooke's law, the Rayleigh surface wave velocity, and the body wave velocity;

[0022] Construct an independent elastic coefficient matrix according to each independent elastic coefficient.

[0023] Optionally, the Brillouin light scattering uses a backscattering optical path and the frequency band is -20 to 20 GHz.

[0024] The present invention provides a non-destructive determination system for the Young's modulus of a bulk alloy, including:

[0025] A Brillouin light scattering module for performing Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; the alloy spectrum includes Rayleigh surface waves and body waves; the body waves include shear waves and longitudinal waves;

[0026] A Lorentz fitting module, configured to perform Lorentz fitting on the alloy spectrum to obtain Rayleigh surface wave frequency shift and body wave frequency shift;

[0027] A first operation module, configured to calculate Rayleigh surface wave sound velocity and body wave sound velocity according to the corresponding relationship between sound velocity and dispersion relationship, the law of conservation of momentum, the Rayleigh surface wave frequency shift and the body wave frequency shift;

[0028] A second operation module, configured to determine an independent elastic coefficient matrix according to Hooke's law, the Rayleigh surface wave sound velocity and the body wave sound velocity;

[0029] A Young's modulus calculation module, configured to calculate the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula.

[0030] The present invention provides an electronic device, including a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the non-destructive determination method for the Young's modulus of a bulk alloy as described above.

[0031] The present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, it implements the non-destructive determination method for the Young's modulus of a bulk alloy as described above.

[0032] According to the specific embodiments provided by the present invention, the following technical effects are disclosed:

[0033] The present invention discloses a non-destructive determination method, system, device and medium for the Young's modulus of a bulk alloy. The method includes obtaining the frequency shifts of Rayleigh surface waves and body waves by using Brillouin light scattering, and then calculating the Young's modulus of the target bulk alloy according to the corresponding relationship between sound velocity and dispersion relationship, the law of conservation of momentum and the Young's modulus formula, which can greatly improve the accuracy of Young's modulus detection without damaging the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings without creative efforts.

[0035] Figure 1 It is a method flow chart of the non-destructive determination method for the Young's modulus of a bulk alloy of the present invention;

[0036] Figure 2Microstructure diagrams of Sn-9at.%Co and Sn-50at.%Cu alloys after thermal stability for different times in this embodiment;

[0037] Figure 3 Microstructure diagrams of parts e, f, g, h, i, j, k, and l of Sn-9at.%Co and Sn-50at.%Cu alloys after thermal stability for different times in this embodiment;

[0038] Figure 4 Function diagrams showing the change of the volume fraction of CoSn phase with alloy position in the primary phase mushy zone of Sn-9at.%Co alloy after thermal stability for 6h and 80h respectively in this embodiment;

[0039] Figure 5 Function diagrams showing the change of the volume fraction of CoSn2 phase with alloy position in the peritectic phase mushy zone of Sn-9at.%Co alloy after thermal stability for 6h and 80h respectively in this embodiment;

[0040] Figure 6 Function diagrams showing the change of the volume fraction of Cu3Sn phase with alloy position in the primary phase mushy zone of Sn-50at.%Cu alloy after thermal stability for 4h and 45h respectively in this embodiment;

[0041] Figure 7 Function diagrams showing the change of the volume fraction of Cu6Sn5 phase with alloy position in the peritectic phase mushy zone of Sn-50at.%Cu alloy after thermal stability for 4h and 45h respectively in this embodiment;

[0042] Figure 8 XRD spectrum diagram of the primary phase mushy zone of Sn-9at.%Co alloy after long-term thermal stability in this embodiment;

[0043] Figure 9 XRD spectrum diagram of the peritectic phase mushy zone of Sn-9at.%Co alloy after long-term thermal stability in this embodiment;

[0044] Figure 10 XRD spectrum diagram of the primary phase mushy zone of Sn-50at.%Cu alloy after long-term thermal stability in this embodiment;

[0045] Figure 11 XRD spectrum diagram of the peritectic phase mushy zone of Sn-50at.%Cu alloy after long-term thermal stability in this embodiment;

[0046] Figure 12 Schematic diagram of the Brillouin light scattering sample structure in this embodiment;

[0047] Figure 13 Schematic diagram of the Brillouin light scattering optical path in this embodiment;

[0048] Figure 14 These are the BLS spectra of the horizontal and vertical samples of the CoSn phase in this embodiment;

[0049] Figure 15 These are the BLS spectra of the horizontal and vertical samples of the CoSn₂ phase in this embodiment;

[0050] Figure 16 These are the BLS spectra of the horizontal and vertical samples of the Cu₃Sn phase in this embodiment;

[0051] Figure 17 These are the BLS spectra of the horizontal and vertical samples of the Cu₆Sn₅ phase in this embodiment;

[0052] Figure 18 This is the structural block diagram of the non-destructive determination system for the Young's modulus of the bulk alloy of the present invention.

[0053] Reference numerals:

[0054] 1 - Polarization analyzer; 2 - Collection lens; 3 - Focusing lens; 4 - Filter; 5 - Beam splitter; 6 - Laser; 7 - Reflector; 8 - Scanner; 9 - Data acquisition system; 10 - Sample. Specific embodiments

[0055] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] The purpose of the present invention is to provide a non-destructive determination method, system, device and medium for the Young's modulus of a bulk alloy, which can improve the accuracy of Young's modulus detection without damaging the sample.

[0057] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] As Figure 1 shown, the present invention provides a non-destructive determination method for the Young's modulus of a bulk alloy, including:

[0059] Step 100: Perform Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; the alloy spectrum includes Rayleigh surface waves and body waves; the body waves include shear waves and longitudinal waves.

[0060] Step 200: Perform Lorentz fitting on the alloy spectrum to obtain the Rayleigh surface wave frequency shift and the bulk wave frequency shift.

[0061] Step 300: Calculate the Rayleigh surface wave sound velocity and the bulk wave sound velocity according to the correspondence between the sound velocity and the dispersion relationship, the law of conservation of momentum, the Rayleigh surface wave frequency shift, and the bulk wave frequency shift.

[0062] Step 400: Determine the independent elastic coefficient matrix according to the Rayleigh surface wave sound velocity and the bulk wave sound velocity.

[0063] Step 500: Calculate the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula.

[0064] As a specific implementation manner, the operation process of step 300 specifically includes the following steps:

[0065] The first step, determine the wave vector of the bulk wave according to the conservation of momentum and the waveform parameters of the bulk wave; the waveform parameters include the angle between the incident light and the scattered light, the refractive index, and the incident light wavelength.

[0066] The second step, determine the wave vector of the Rayleigh surface wave according to the conservation of momentum, the incident angle of the Rayleigh surface wave, and the incident light wavelength.

[0067] [[ID=2l]]The third step, calculate the Rayleigh surface wave sound velocity and the bulk wave sound velocity according to the correspondence between the sound velocity and the dispersion relationship, the wave vector of the bulk wave, the wave vector of the Rayleigh surface wave, the Rayleigh surface wave frequency shift, and the bulk wave frequency shift.

[0068] As a specific implementation manner, the operation process of step 400 specifically includes the following steps:

[0069] The first step, determine the crystal structure of the target bulk alloy.

[0070] The second step, determine the independent elastic coefficient matrix according to the crystal structure, the Rayleigh surface wave sound velocity, and the bulk wave sound velocity. The specific process is as follows: determine the number of independent elastic coefficients according to the crystal structure; calculate each independent elastic coefficient according to Hooke's law, the Rayleigh surface wave sound velocity, and the bulk wave sound velocity; construct an independent elastic coefficient matrix according to each independent elastic coefficient.

[0071] In this embodiment, Brillouin light scattering adopts a backscattering optical path, and the frequency band is -20 to 20 GHz.

[0072] Based on the above method, the following embodiments are provided:

[0073] Brillouin light scattering (BLS), as a non-destructive optical detection technique, utilizes the inelastic scattering between photons and phonons. By detecting the intensity of scattered light at different frequencies, the frequency shift of elastic waves can be obtained. By changing the sample thickness, incident angle, polarization conditions, etc., the acoustic phonons detectable by the BLS spectrum are mainly divided into two categories. The first category is the bulk waves (BAW) propagating inside the material, including longitudinal waves (L) propagating along the vibration direction and transverse waves (T) propagating perpendicular to the vibration direction. The second category is the surface waves propagating on the surface, i.e., Rayleigh surface waves (RSAW) propagating near the sample surface. By determining the frequency shift of elastic waves, sound velocity, and independent elastic coefficients of anisotropic materials, the Young's modulus can be calculated based on this.

[0074] According to the conservation of momentum, the wave vector of BAW can be expressed as:

[0075]

[0076] where n is the refractive index, λ is the wavelength of the incident light, is the angle between the incident light and the scattered light. For the backscattering structure, the corresponding phonon wave vector is:

[0077]

[0078] According to the in-plane momentum conservation, the wave vector of RSAW can be expressed as:

[0079]

[0080] θ i is the incident angle. The dispersion relation of acoustic phonons is linear, and the sound velocity corresponds to the slope of the dispersion relation:

[0081]

[0082] For bulk waves and Rayleigh waves, the sound velocity is:

[0083]

[0084]

[0085] The Rayleigh wave and longitudinal wave of the intermetallic compound are obtained by Lorentz fitting. Substituting the frequency shifts of these two waves into the above formula, the respective Rayleigh sound velocity v R and longitudinal wave sound velocity v L are obtained. The relationship between the Rayleigh wave sound velocity and the bulk wave sound velocity is:

[0086]

[0087] The shear wave velocity can be obtained therefrom. Different sound velocities can be used to calculate different independent elastic coefficients, and the number of independent elastic coefficients decreases with the increase in crystal symmetry.

[0088] BLS is often used to measure the sound velocities of certain thin films and glasses to obtain mechanical properties such as independent elastic coefficients (C) and Young's modulus (E). For anisotropic materials, the independent elastic coefficients establish the relationship between the sound velocity and Young's modulus as important parameters. The number of independent elastic coefficients is closely related to the crystal structure, and Hooke's law can be used to describe the relationship between stress and elastic strain. According to Hooke's law:

[0089] σ ij = C ijkl ε k l . (8)

[0090] Different sound velocities can be used to calculate different independent elastic coefficients, and the number of independent elastic coefficients decreases with the increase in crystal symmetry.

[0091] The relationship between the independent elastic coefficients and the sound velocity is established by the following formula:

[0092]

[0093]

[0094]

[0095]

[0096] C 12 = C 11 - 2C 66 (13)

[0097] C 13 = C 33 - 2C 44 (14)

[0098] v LH and v TH are the longitudinal wave velocity and shear wave velocity measured from the horizontal sample respectively, and v LV and v TV are the longitudinal wave velocity and shear wave velocity measured from the vertical sample respectively. After obtaining all the independent elastic coefficients, the Young's modulus (E || ) in the horizontal direction and the Young's modulus (E ⊥ ) in the vertical direction can be calculated by the following formulas respectively:

[0099]

[0100]

[0101] Since BLS is a non-destructive measurement method, combined with single-phase samples of intermetallic compounds and mature calculation theory, the Young's modulus obtained by the BLS method is more accurate.

[0102] In view of the obvious shortcomings and deficiencies of the existing testing methods for the Young's modulus of bulk alloys, such as being destructive to samples, having significant errors, and complex sample preparation, the present invention provides a method suitable for non-destructive testing of the Young's modulus in bulk alloys, in combination with the theory in the prior art based on the BLS testing method, which can perform first-principles calculation and characterization of the Young's modulus of alloys. This method uses an alloy block with a length and width of 2 mm and a thickness of 0.5 mm as the research object, tests and calculates the Young's modulus in intermetallic compounds with complex crystal structures, and compares the results with those obtained by the nanoindentation method to verify the reliability of the method. This method uses advanced instruments and mature data processing theory, obtains reliable results, and is non-destructive to the samples to be tested.

[0103] Example 1

[0104] A method for nondestructive testing of the Young's modulus of a Sn-9at.%Co peritectic alloy, comprising the following steps:

[0105] (1) Weigh high-purity tin (Sn) and cobalt (Co) in the required proportions and place the raw materials in a vacuum induction melting furnace for smelting. Use wire cutting technology to cut Φ6mm × 110mm round bars from the ingot, polish and clean them, and place them in a high-purity alumina crucible.

[0106] (2) Static thermal stabilization was carried out in a Bridgman furnace for 6 h and 80 h at a temperature of 1000 °C. After thermal stabilization, the samples were quenched in a Ga-In-Sn liquid to complete the sample preparation. Subsequently, the samples were polished and the microstructure and phase composition of the samples were analyzed using an X-ray diffractometer and a scanning electron microscope. The volume fraction of the phases was analyzed using Image J software. The results are shown in Figures 2 - 5 、 Figures 8 - 9 middle.

[0107] (3) After long-term thermal stabilization, the Sn-9at.%Co alloy sample was cut to prepare horizontal (H) and vertical slices (V) with a size of 2 mm × 2 mm × 0.5 mm. The sample surface was polished and placed on the Brillouin light scattering instrument sample rod of the Sandercock type FP interferometer with six channels (3+3) in series. The position relationship of the light scattering sample is as follows: Figure 12 As shown, m is 0.5 mm, l is 2 mm, p is 2 mm, and the incident angle is 10°. In addition, the light scattering instrument and the light scattering route are as follows Figure 13As shown, the light scattering instrument includes: a polarization analyzer 1, a collection lens 2, a focusing lens 3, a filter 4, a beam splitter 5, a laser 6, a reflector 7, a scanner 8, a data acquisition system 9, and a sample 10.

[0108] (4) Set the working parameters of the Brillouin light scattering instrument: The optical path is set to backscattering. The incident light wavelength is 532 nm, the incident angle θ i is 10°, the detection frequency band is -20 to 20 GHz, and start the test.

[0109] (5) Obtain the Brillouin spectra of the CoSn and CoSn2 phases, as Figures 14 - 15 shown. Through Lorentz fitting, Rayleigh surface waves and body waves and their frequency shifts can be observed in the spectra.

[0110] (6) Combine the frequency shifts of the Rayleigh surface waves and body waves in the spectra, and calculate the sound velocity using formulas (1) - (7). The results are shown in Table 1.

[0111] (7) Calculate the independent elastic coefficient matrices corresponding to the CoSn and CoSn2 phases based on the sound velocity. The CoSn phase has a hexagonal structure, and the CoSn2 phase has a tetragonal structure. Phases with hexagonal and tetragonal structures require six independent elastic coefficients. The specific independent elastic coefficient matrices are as follows:

[0112]

[0113] Combine formulas (8) - (14) to calculate the independent elastic coefficients of the CoSn and CoSn2 phases. The results are shown in Table 1.

[0114] (8) According to the independent elastic coefficient matrices, combine formulas (15) - (16) to calculate the anisotropic elastic moduli (i.e., Young's moduli) of the CoSn and CoSn2 phases. The results are shown in Table 1.

[0115] Table 1 Calculation parameters and results of intermetallic compounds

[0116]

[0117]

[0118] Example 2

[0119] A method for non-destructive detection of the Young's modulus of a Sn - 50 at.% Cu peritectic alloy, the specific steps are as follows:

[0120] (1) Weigh high-purity tin (Sn) and copper (Cu) in the required proportions and place the raw materials in a vacuum induction melting furnace for smelting. Use wire cutting technology to cut φ6mm × 110mm round bars from the ingots, polish and clean them, and place them in a high-purity alumina crucible.

[0121] (2) Static thermal stabilization was carried out in a Bridgman furnace for 4 h and 45 h at a temperature of 1000 °C. After thermal stabilization, the samples were quenched in a Ga-In-Sn liquid to complete the sample preparation. Subsequently, the samples were polished and the microstructure and phase composition of the samples were analyzed using an X-ray diffractometer and a scanning electron microscope. The volume fraction of the phases was analyzed using Image J software. The results are shown in Figures 2 - 3 、 Figures 6 - 7 、 Figures 10 - 11 middle.

[0122] (3) After a long period of thermal stabilization, the Sn-50at.%Cu alloy sample was cut to prepare horizontal (H) and vertical (V) slices with a size of 2 mm × 2 mm × 0.5 mm. The sample surface was polished and placed on the Brillouin light scattering instrument sample rod of the Sandercock type FP interferometer with six channels (3+3) in series. The position relationship of the light scattering sample and the schematic diagram of the light scattering instrument are shown in Figure 2. Figures 12 - 13 shown.

[0123] (4) Set the operating parameters of the Brillouin light scattering instrument: set the optical path to backscattering, the incident light wavelength to 532nm, the incident angle to 10°, the detection frequency band to -20 to 20GHz, and start the test.

[0124] (5) Obtain the Brillouin spectra of Cu3Sn and Cu6Sn5 phases, such as Figures 16 - 17 As shown in Figure 2, Rayleigh surface waves and body waves and their frequency shifts can be observed in the spectrum through Lorentz fitting.

[0125] (6) The sound velocity is calculated by combining the frequency shift of the Rayleigh surface wave and the body wave in the spectrum with formula (1)-formula (7). The results are shown in Table 1.

[0126] (7) Calculate the independent elastic coefficient matrix corresponding to the Cu3Sn and Cu6Sn5 phases based on the sound velocity. The Cu3Sn phase has a monoclinic structure, and the Cu6Sn5 phases both have a hexagonal structure. The phase with a monoclinic structure requires nine independent elastic coefficients, and the phase with a hexagonal structure requires six independent elastic coefficients. Since Cu3Sn is transversely isotropic, it only has six independent elastic coefficients. The specific independent elastic coefficient matrix is as follows:

[0127]

[0128] Calculate the independent elastic coefficients of the Cu3Sn and Cu6Sn5 phases by combining formulas (8)-(14), and the results are shown in Table 1.

[0129] (8) According to the independent elastic coefficient matrix, calculate the anisotropic elastic moduli of the Cu3Sn and Cu6Sn5 phases by combining formulas (15)-(16), and the results are shown in Table 1.

[0130] In the above two embodiments, the anisotropic Young's moduli of the intermetallic compound phases in the Sn-9at.%Co and Sn-50at.%Cu peritectic alloys are respectively measured by the BLS non-destructive testing method. To verify the accuracy of the test results, compared with the previous work, the comparison data are listed in Table 1.

[0131] It is found by comparison that the test results are in good agreement with those obtained by other methods, and are slightly lower than those measured by the nano-indentation method in most literatures. This is because in the nano-indentation experiment, when the indenter is pressed into the sample, dislocations expand into the sample under the action of the indenter stress field, thereby causing plastic deformation and strengthening of the sample, which leads to an overestimation of the Young's modulus. This result verifies the effectiveness of BLS in measuring the elastic modulus of phases with complex crystal structures in alloys, which is crucial for a deep understanding of the elastic properties of bulk alloys, enabling BLS non-destructive testing to conduct more explorations on bulk alloys and potentially becoming an important tool for measuring the elastic modulus of opaque bulk materials in the near future. Moreover, the above method can not only non-destructively measure the Young's modulus of bulk alloys, but also further improve the reliability of the test by preparing single-phase intermetallic compounds through the static thermal stabilization treatment of the directional solidification technology.

[0132] As Figure 18 shown, the present invention provides a non-destructive measurement system for the Young's modulus of a bulk alloy, including:

[0133] A Brillouin light scattering module for performing Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; the alloy spectrum includes Rayleigh surface waves and body waves; the body waves include shear waves and longitudinal waves.

[0134] A Lorentz fitting module for performing Lorentz fitting on the alloy spectrum to obtain the Rayleigh surface wave frequency shift and the body wave frequency shift.

[0135] A first operation module for calculating the Rayleigh surface wave sound velocity and the body wave sound velocity according to the corresponding relationship between the sound velocity and the dispersion relationship, the law of conservation of momentum, the Rayleigh surface wave frequency shift, and the body wave frequency shift.

[0136] A second operation module for determining the independent elastic coefficient matrix according to Hooke's law, the Rayleigh surface wave sound velocity, and the body wave sound velocity.

[0137] A Young's modulus calculation module, configured to calculate the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula.

[0138] The present invention provides an electronic device, including a memory and a processor. The memory is configured to store a computer program, and the processor runs the computer program to enable the electronic device to execute the non-destructive determination method for the Young's modulus of the bulk alloy as described above.

[0139] The present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the non-destructive determination method for the Young's modulus of the bulk alloy as described above.

[0140] In the present specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0141] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A non-destructive determination method of Young's modulus of a bulk alloy, characterized in that: include: Performing Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; the alloy spectrum includes Rayleigh surface waves and bulk waves; the bulk waves include shear waves and longitudinal waves; Performing Lorentz fitting on the alloy spectrum to obtain Rayleigh surface wave frequency shift and body wave frequency shift; Calculating the Rayleigh surface wave speed and the body wave speed according to the corresponding relationship between the sound speed and the dispersion relation, the law of conservation of momentum, the Rayleigh surface wave frequency shift and the body wave frequency shift; Determining an independent elastic coefficient matrix based on the Rayleigh surface wave velocity and the body wave velocity includes: determining a crystal structure of a target bulk alloy; determining a number of independent elastic coefficients based on the crystal structure; calculating each independent elastic coefficient based on Hooke's law, the Rayleigh surface wave velocity, and the body wave velocity; and constructing an independent elastic coefficient matrix based on each independent elastic coefficient; Calculating the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula; The calculating of the Rayleigh surface wave speed and the body wave speed according to the correspondence between the sound speed and the dispersion relation, the law of conservation of momentum, the Rayleigh surface wave frequency shift and the body wave frequency shift specifically includes: determining a wave vector of the body wave according to conservation of momentum and waveform parameters of the body wave; the waveform parameters including an angle between incident light and scattered light, a refractive index, and a wavelength of the incident light; determining a wave vector of the Rayleigh surface wave according to conservation of momentum, the incident angle of the Rayleigh surface wave, and the wavelength of the incident light; Calculating the Rayleigh surface wave speed and the body wave speed according to the corresponding relationship between the sound speed and the dispersion relation, the wave vector of the body wave, the wave vector of the Rayleigh surface wave, the Rayleigh surface wave frequency shift and the body wave frequency shift; The Brillouin light scattering adopts a backscattering light path, and the frequency shift range is -20 to 20 GHz; According to the conservation of momentum, the wave vector of bulk wave (BAW) can be expressed as: Where n is the refractive index, λ is the wavelength of the incident light, is the angle between the incident light and the scattered light; for backscattering structures, The corresponding phonon wave vector is: According to the conservation of in-plane momentum, the wave vector of Rayleigh surface wave (RSAW) can be expressed as: θ i is the angle of incidence; the dispersion relation of acoustic phonons is linear, and the speed of sound corresponds to the slope of the dispersion relation: For body waves and Rayleigh surface waves, the speed of sound is: The Rayleigh surface wave and bulk wave of the intermetallic compound are obtained by Lorentz fitting; the frequency shifts of these two waves are substituted into the above formula to obtain their respective Rayleigh surface sound velocity v R and longitudinal wave velocity v L , the relationship between the Rayleigh surface wave speed and the body wave speed is: v T represents the shear wave velocity; The relationship between the independent elastic coefficient C and the speed of sound is established by the following formula: v LH and v TH are the longitudinal wave speed and shear wave speed measured on the horizontal sample, v LV and v TV are the longitudinal wave velocity and transverse wave velocity measured vertically on the sample; Young's modulus E in the horizontal direction || and the Young's modulus E in the vertical direction ⊥ They can be calculated using the following formulas:

2. A non-destructive measurement system for Young's modulus of bulk alloys, applied to the non-destructive measurement method for Young's modulus of bulk alloys according to claim 1, characterized in that: include: A Brillouin light scattering module, configured to perform Brillouin light scattering on the target bulk alloy to obtain an alloy spectrum; The alloy spectrum includes Rayleigh surface waves and body waves; the body waves include shear waves and longitudinal waves; a Lorentz fitting module, configured to perform Lorentz fitting on the alloy spectrum to obtain Rayleigh surface wave frequency shift and body wave frequency shift; A first operation module is used to calculate the Rayleigh surface wave speed and the body wave speed according to the corresponding relationship between the sound speed and the dispersion relation, the law of conservation of momentum, the Rayleigh surface wave frequency shift and the body wave frequency shift; A second operation module is used to determine an independent elastic coefficient matrix according to Hooke's law, the Rayleigh surface wave speed and the body wave speed; A Young's modulus calculation module is used to calculate the Young's modulus of the target bulk alloy according to the independent elastic coefficient matrix and the Young's modulus formula.

3. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to perform the non-destructive determination method of the Young's modulus of a bulk alloy according to claim 1.

4. A computer-readable storage medium, characterized in that The device stores a computer program, which, when executed by a processor, implements the non-destructive determination method of the Young's modulus of a bulk alloy as claimed in claim 1.

Images