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A kind of x-ray residual stress testing method of ti2alnb alloy for casing

A technology of residual stress and test method, applied in force/torque/work measuring instruments, measuring force, measuring devices, etc., can solve problems such as unusable parts and parts damage, and achieve the effect of solving inaccurate test results

Active Publication Date: 2021-12-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the blind hole method needs to drill holes on the measurement object, it will damage the parts and make the tested parts unusable. Therefore, there is a strong application demand for the non-destructive X-ray diffraction method in the field of residual stress detection of Ti2AlNb alloys for casings.

Method used

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  • A kind of x-ray residual stress testing method of ti2alnb alloy for casing
  • A kind of x-ray residual stress testing method of ti2alnb alloy for casing
  • A kind of x-ray residual stress testing method of ti2alnb alloy for casing

Examples

Experimental program
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Effect test

Embodiment

[0066] Ti2AlNb alloy aero engine casing member, the material of nominal composition Ti-11Al-38Nb-2Mo-1.5Zr, machining requirements for residual stress measurement surface thereof is completed.

[0067] In order to detect the residual stress measured at a certain point Ti2AlNb alloy casing member, the processing is completed, the following steps:

[0068] Ti2AlNb alloy casing member to determine residual stress corresponding to the detected original blank Ti2AlNb metallographic sample was prepared from the starting blank;

[0069] Ti2AlNb of metallographic specimens embedded sample, grinding and polishing;

[0070] Hydrofluoric acid etching solution of hydrogen peroxide wiper Ti2AlNb metallographic sample;

[0071] Metallographic samples were determined by metallographic analysis O-Ti 2 AlNb phase volume fraction value of 22%, α 2 -Ti 3 Al phase volume fraction values ​​were 7% and B 2 Phase volume fraction value of 71%, 7% satisfy 22% + 71% + = 100%;

[0072] The alloys tested Ti2...

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Abstract

The invention belongs to the field of non-destructive detection of residual stress of Ti2AlNb alloy, and relates to an X-ray residual stress test method of Ti2AlNb alloy for casing, including metallographic composition analysis, X-ray residual stress detection of Cu target, X-ray residual stress detection of V target and through The formula calculates the residual stress value of Ti2AlNb alloy; the present invention considers the different crystal structures of each phase of Ti2AlNb alloy, and improves the accuracy of measuring the residual stress of Ti2AlNb alloy by X-ray method through step-by-step testing and formula calculation. Component fatigue life and design calculations provide reliable data.

Description

Technical field [0001] The present invention belongs to the field of nondestructive testing of residual stress Ti2AlNb alloy, particularly to a receiver with an X-ray Ti2AlNb alloy of residual stress. Background technique [0002] Member during the manufacturing process, and subjected to the influence factors from various manufacturing processes or the like, after the disappearance of these factors, and if these effects do not affect the member is subjected will disappear completely, there are still some remaining in the role and impact the inner member, such an effect is called the residual effect of residual stress. It is a member when no external factors, while maintaining stress balancing member in the presence of, a member belonging to intrinsic stress. Studies have shown that, when there is a residual compressive stress surface member, tensile stress generated to offset a portion of the working member, thereby significantly suppressed delayed surface cracks and improve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/25
CPCG01L1/25G01L5/0047
Inventor 王彦菊沙爱学周毅
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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