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X-ray residual stress testing method of Ti2AlNb alloy for casing

A technology of residual stress and testing method, applied in the direction of force/torque/work measuring instrument, measuring force, measuring device, etc., can solve the problems of unusable parts, damaged parts, etc., and achieve the effect of solving inaccurate test results

Active Publication Date: 2020-12-08
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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  • X-ray residual stress testing method of Ti2AlNb alloy for casing
  • X-ray residual stress testing method of Ti2AlNb alloy for casing
  • X-ray residual stress testing method of Ti2AlNb alloy for casing

Examples

Experimental program
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Embodiment

[0066] A Ti2AlNb alloy casing component used in an aero-engine has a nominal material composition of Ti-11Al-38Nb-2Mo-1.5Zr, and it is required to measure the surface residual stress after machining.

[0067] In order to detect the residual stress at a measurement point of the Ti2AlNb alloy casing component, after the machining is completed, the following steps are carried out:

[0068] Determine the original blank corresponding to the Ti2AlNb alloy casing component to be tested for residual stress, and prepare a Ti2AlNb metallographic sample from the original blank;

[0069] Embedding, grinding and polishing of Ti2AlNb metallographic samples;

[0070] Wipe and etch Ti2AlNb metallographic samples with hydrofluoric acid hydrogen peroxide solution;

[0071] Determination of O-Ti in metallographic samples by metallographic analysis 2 AlNb phase volume fraction value is 22%, α 2 -Ti 3 Al phase volume fraction value is 7% and B 2 The value of phase volume fraction is 71%, sati...

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Abstract

The invention belongs to the field of Ti2AlNb alloy residual stress nondestructive testing, and relates to an X-ray residual stress testing method of a Ti2AlNb alloy for a casing, which comprises metallographic component analysis, Cu target X-ray residual stress detection, V target X-ray residual stress detection and calculation of a Ti2AlNb alloy residual stress value through a formula. Accordingto the method, different crystal structures of all phases of the Ti2AlNb alloy are considered, the accuracy of measuring the residual stress of the Ti2AlNb alloy through an X-ray method is improved through step-by-step testing and formula calculation, and reliable data are provided for analyzing the fatigue life of a Ti2AlNb alloy component for a cartridge receiver and designing and calculating the Ti2AlNb alloy component.

Description

technical field [0001] The invention belongs to the field of non-destructive detection of residual stress of Ti2AlNb alloy, in particular to an X-ray residual stress test method of Ti2AlNb alloy for casing. Background technique [0002] During the manufacturing process of components, they will be affected and affected by factors such as various manufacturing processes. When these factors disappear, if these functions and influences on components do not disappear completely, there are still some functions and influences remaining in the In the component, this residual effect and influence is called residual stress. It is the stress that exists in the component to maintain balance when there is no external factor acting on the component, and it belongs to the inherent stress of the component. Studies have shown that when there is residual compressive stress on the surface of the component, it can offset the tensile stress generated by part of the component during work, thereb...

Claims

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Application Information

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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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