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Comparison of two X-ray residual stress measurement methods: sin2 ψ and cos α, through the determination of a martensitic steel X-ray elastic constant

Dorian Delbergue, Damien Texier, Martin Lévesque, Philippe Bocher

Paper (2016)

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Abstract

X-ray diffraction technique for residual stresses measurement is usually associated to the sin2 ψ method, a method based on the interception of the diffraction cone and line detectors. To overcome this loss of information, the cos α method is an alternative method which uses a singleexposure to collect the entire diffraction cone via a 2D detector. The present paper compares both sin2 ψ and cos α methods, through the X-ray elastic constant (XEC) determination of a quenched and tempered martensitic steel. The full-cone measurement method demonstrates a smaller scatter and a better repeatability of the measurements. This latter point is of considerable interest since largerscatter in XEC may result in large variation in residual stress values, especially at high stress levels.

Uncontrolled Keywords

X-Ray Diffraction, Residual Stresses, X-Ray Elastic Constant, Single Exposure

Subjects: 2100 Mechanical engineering > 2100 Mechanical engineering
Department: Department of Mechanical Engineering
Research Center: LM2 - Laboratory for Multi-scale Mechanics
Funders: CRSNG/NSERC, Consortium de recherche et d'innovation en aérospatiale au Québec - project MANU508
PolyPublie URL: https://publications.polymtl.ca/4729/
Conference Title: 10th International Conference on Residual Stresses (ICRS10)
Conference Location: Sydney, Australia
Conference Date(s): 2016-08-03 - 2016-08-07
Publisher: Materials Research Forum LLC
DOI: 10.21741/9781945291173-10
Official URL: https://doi.org/10.21741/9781945291173-10
Date Deposited: 17 Dec 2021 10:49
Last Modified: 10 Nov 2022 15:28
Cite in APA 7: Delbergue, D., Texier, D., Lévesque, M., & Bocher, P. (2016, August). Comparison of two X-ray residual stress measurement methods: sin2 ψ and cos α, through the determination of a martensitic steel X-ray elastic constant [Paper]. 10th International Conference on Residual Stresses (ICRS10), Sydney, Australia (6 pages). https://doi.org/10.21741/9781945291173-10

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