A method of improving the damping performance of tc4 titanium alloy by magnetron sputtering surface treatment

A surface treatment, magnetron sputtering technology, applied in sputtering coating, metal material coating process, ion implantation coating and other directions, can solve the problems of low damping performance, less deformation, less energy dissipation, etc.

Inactive Publication Date: 2018-05-22
SOUTHWEST JIAOTONG UNIV
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  • Description
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Problems solved by technology

[0003] TC4 is a two-phase alloy, so its damping mechanism should be a multi-phase damping mechanism, that is, when the sample vibrates and deforms under load, the matrix α phase produces elastic deformation due to its high strength, and the strength of the dispersed phase β phase is relatively low. Plastic deformation will result in energy dissipation, resulting in a damping effect; however, although the strength of the β phase is relatively lower than that of the α phase in vibration, its strength is actually higher, so whether it is the α phase or the β phase during vibration Phase, the deformation of both is not obvious, and the energy dissipation is less, so TC4 has the disadvantage of low damping performance commonly found in titanium alloys...

Method used

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  • A method of improving the damping performance of tc4 titanium alloy by magnetron sputtering surface treatment
  • A method of improving the damping performance of tc4 titanium alloy by magnetron sputtering surface treatment
  • A method of improving the damping performance of tc4 titanium alloy by magnetron sputtering surface treatment

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preparation example Construction

[0021] The preparation method of the present invention comprises the steps:

[0022] (1) The material is TC4 titanium alloy rod material as the raw material, and the chemical composition of TC4 titanium alloy rod is shown in Table 1-1.

[0023] Table 1-1 Chemical composition of TC4

[0024]

[0025] (2) Vacuum coating was carried out on the samples using a magnetron sputtering coating machine of the model JC400-1 produced by Chengdu Westwork Co., Ltd. Various types of targets were selected, and magnetron sputtering coating was performed on two adjacent surfaces of the substrate TC4; metal films, inorganic non-metal films, composite films and some compound films were formed on the surface of TC4 samples; All anode targets and the specific process parameters of each target are shown in Table 1-2.

[0026] Table 1-2 Magnetron sputtering coating process parameters

[0027]

[0028] (3) The damping performance is characterized by the JN-1 Gerner pendulum tester. The sampl...

Embodiment 1

[0030] The damping test parameters of Cu layer deposited on the surface of TC4 are shown in Table 2

[0031] Table 2 Parameters of damping experiment of samples with Cu layer deposited on TC4 surface

[0032]

[0033] The results of the sample damping test are as follows: figure 1 shown.

[0034] From the comparison between the Cu-plated sample and the uncoated TC4 sample, it can be seen that the damping performance of the Cu-plated sample is much higher than that of the substrate, and the strain amplitude reaches 10 -3 The damping coefficient of the highest point is close to 0.009, and the damping Q of the sample after Cu plating on the surface -1 increased by about three times. In the figure, the sample damping increases smoothly with the increase of the strain amplitude, and the sample has a strain amplitude of 5.96×10 -4 The speed of the rise of the rear damping becomes faster. The mechanism of the Cu film improving the damping performance of TC4 is mainly divided ...

Embodiment 2

[0036] Table 3 shows the damping test parameters of SiO2 film layer samples deposited on the surface of TC4 alloy.

[0037] Table 3 SiO deposited on the surface of TC4 alloy 2 Parameters of damping experiment of film layer sample

[0038]

[0039] The results of the sample damping test are as follows: figure 2 shown.

[0040] Depend on figure 2 It can be seen that SiO 2 As an inorganic non-metallic film deposited on the surface of TC4, the strain amplitude ε reaches 10 -3, the damping reaches a maximum of 0.011, which is about four times higher than the inherent damping of TC4. SiO 2 The crystal structure is a regular tetrahedral structure composed of one Si atom and four O atoms with the smallest equal distance around it, where each Si atom forms four covalent bonds with four O atoms, and each O atom forms four covalent bonds with two Si atoms also form two covalent bonds, the whole SiO 2 The crystal is a three-dimensional network structure composed of a Si:O rat...

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Abstract

The invention discloses a technique for improving the damping performance of TC4 titanium alloy through magnetron sputtering surface treatment. The surface treatment of TC4 titanium alloy is carried out to improve the damping performance. Optimum sputtering process parameters to deposit surface films on TC4 samples to improve the damping properties of TC4 titanium alloys. In the invention, a thin film with a thickness of nanometer or micrometer order is formed on the surface of TC4 alloy through magnetron sputtering technology. The interface between the film and the substrate and dislocations near the interface are often the main source of damping in the film material, and energy can often be dissipated through the mechanism of dislocation damping during vibration. Comparing the damping performance of TC4 alloy after surface treatment with that of untreated TC4 alloy, the damping coefficient of TC4 alloy is 0.0034, and the damping coefficient of TC4 alloy can be effectively improved by magnetron sputtering surface treatment technology, so that the damping performance of TC4 alloy can be improved 3-5 times.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment functional materials, especially magnetron sputtering surface treatment. Background technique [0002] TC4 titanium alloy is a kind of α+β two-phase titanium alloy with medium mechanical strength. The transformation temperature between α phase and β phase is about 995°C. TC4 titanium alloy has good properties and excellent corrosion resistance. , small density, high specific strength, good toughness and weldability, etc., have been successfully applied in aerospace, petrochemical, shipbuilding, automobile, pharmaceutical and other departments. At present, TC4 titanium alloy is the most widely used Titanium alloy; In the field of aerospace, TC4 is widely used in the manufacture of aircraft engine fans, compressor discs and blades. The extremely critical load-bearing parts in the entire aircraft cabin structure such as the beam of the cabin fuselage, The frame and the joints in the ...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/06C23C14/16C23C14/08
Inventor 刘红梅陈辉胥永刚刘艳苟国庆王峰阳陈宇高天学
Owner SOUTHWEST JIAOTONG UNIV
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