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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 and Philippe Bocher

Conference or Workshop Item - Paper (2016)

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Cite this document: 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 presented at 10th International Conference on Residual Stresses (ICRS10), Sydney, Australia (6 pages). doi:10.21741/9781945291173-10
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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 single exposure 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 larger scatter 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

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
Department: Département de génie mécanique
Research Center: LM2 - Laboratoire de Mécanique Multi-échelles
Funders: CRSNG/NSERC, Consortium de recherche et d'innovation en aérospatiale au Québec - project MANU508
Date Deposited: 17 Dec 2021 10:49
Last Modified: 18 Dec 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4729/
Document issued by the official publisher
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
Official URL: https://doi.org/10.21741/9781945291173-10

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