Accuracy of X-ray diffraction measurement of residual stresses in shot peened titanium alloy samples

Accuracy of residual stress measurement using the Sin^2 ψ method has become a focus in many applications where residual stress plays a critical role in components, such as aeronautics, railway welding, bearings, gears, etc. Accuracy in residual stress measurement requires consideration of both corre...

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Bibliographic Details
Published inNondestructive testing and evaluation Vol. 34; no. 2; pp. 164 - 177
Main Authors Fu, Xuesong, Niu, Zhiqiang, Deng, Ying, Zhang, Jie, Liu, Chongyuan, Chen, Guoqing, Li, Zhiqiang, Zhou, Wenlong
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 03.04.2019
Taylor & Francis Ltd
Subjects
Accuracy
Aeronautics
Compression tests
correctness
Elastic properties
Parameter uncertainty
Residual stress
Shot peening
Stress measurement
Titanium alloys
Titanium base alloys
uncertainty
X-ray diffraction
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Summary:Accuracy of residual stress measurement using the Sin^2 ψ method has become a focus in many applications where residual stress plays a critical role in components, such as aeronautics, railway welding, bearings, gears, etc. Accuracy in residual stress measurement requires consideration of both correctness and uncertainty. In this paper, a self-designed and home-made in-situ tension/compression device is adapted to evaluate the correctness of residual stress measurement in titanium alloy. A calculation method employing multiple convolutions to evaluate the uncertainty of residual stress measurement is presented. Test results show that the X-ray elastic constant is an important parameter impacting the correctness of residual stress measurement. And that the uncertainty of residual stress measurement fluctuates with the surface status of shot peened samples.
ISSN:1058-9759
1477-2671
DOI:10.1080/10589759.2019.1573239