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Determination method for elastic constants of monocrystalline high temperature alloy

A technology of elastic constant and measurement method, which is applied in the direction of measuring device, analysis of solid with sound wave/ultrasonic wave/infrasonic wave, material analysis with sound wave/ultrasonic wave/infrasonic wave, etc. It can solve the difficulty of sample processing and the complex process of elastic constant of single crystal alloy , the large size of the material plate, etc., to achieve the effect of easy growth of single crystal, simple measurement process and data processing

Active Publication Date: 2019-11-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] At present, the Poisson's ratio of single crystal alloy is measured by laser interference moiré method, and the testing process and data processing process are complicated.
During the measurement process, it is necessary to prepare a Poisson’s ratio sample with a large size and a relatively complex shape. The size of the material plate required for processing the sample is large, and it is easy to form miscellaneous crystals. The preparation is difficult, and the processing of samples with complex shapes is also difficult.
The test process of measuring the Poisson's ratio of the sample by laser moiré interferometry is relatively complicated. The data processing needs to identify and count the interference moiré. Matrix inversion operation to get the final elastic constant
Therefore, the process of using the existing method for calculating the elastic constant of single crystal alloy is complicated and difficult

Method used

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  • Determination method for elastic constants of monocrystalline high temperature alloy
  • Determination method for elastic constants of monocrystalline high temperature alloy
  • Determination method for elastic constants of monocrystalline high temperature alloy

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Embodiment 1

[0041] The first-generation single crystal superalloy (DD413) was used as the experimental material, and a single crystal material plate with specific primary and secondary orientations was grown by the seed crystal method in an industrial large-scale dual-zone heating ZGD-15 vacuum single crystal furnace. There are two different orientations of the single crystal plate, and the orientations of the seed crystals are: - and -.

[0042] 1. Cut cylindrical seed crystals with a diameter of 10mm and a height of 12mm and a base plane width of 8mm from the [001] single crystal superalloy rod produced by the crystal selection method, and the orientations are respectively the above two orientations. After the firing of the ceramic shell is completed, the seed crystal is placed in its seed crystal cavity, and the master alloy with the same composition is used as the experimental material for directional solidification to obtain a single crystal growing in the direction of the set seed cr...

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Abstract

The invention discloses a determination method for elastic constants of monocrystalline high temperature alloy, and belongs to the technical field of physical parameter determination of monocrystalline alloy. According to the method, two types of monocrystalline high temperature alloy plates with specific 3D orientations are prepared by a seed crystal method, first and second orientations of the first type of monocrystalline plate are (001) and (100) respectively, and first and second orientations of the second type of monocrystalline plate are (011) and (110) respectively. A rectangular elastic modulus sample whose length direction is in parallel with the primary orientation of the monocrystalline plate is cut from a material plate, and the young modulus E (001) and the shear modulus G(001)-(100) of the first type of sample and the shear modulus G (011)-(110) of the second type of sample are measured by a knock resonance method. The three elastic constants C11, C12 and C44 of the monocrystalline high temperature alloy can be simply calculated from the measured young modulus and two shear modulus.

Description

technical field [0001] The invention relates to the technical field of measuring physical property parameters of single crystal alloys, in particular to a method for measuring elastic constants of cubic single crystal superalloys at different temperatures. Background technique [0002] Single crystal superalloys have a cubic crystal structure, and the most notable feature is anisotropy. The alloy has significant differences in Young's modulus and shear modulus along each crystal direction, while the bending frequency of single crystal and torsional frequency depend on the alloy's Young's modulus and shear modulus, respectively, so the vibration analysis of a single crystal blade must determine the modulus values ​​corresponding to its crystal orientation. Stress analysis of anisotropic single crystal superalloys must also fully understand the elastic properties of the alloy. A comprehensive description of the elastic properties of single crystal superalloys requires three el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/045
Inventor 刘金来叶荔华周亦胄李金国孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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