Evaluation of Residual Stress by X-Ray Diffraction and Correlative Stress Modelling

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Evaluation of Residual Stress by X-Ray Diffraction and Correlative Stress Modelling

S. Kumar, A. Crivoi, M.J. Tan, A. Tai, I. Marinescu

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Abstract. Residual stress is an unavoidable problem which occurs during any manufacturing process or during repair when it is unwanted or uncontrolled, and becomes a limitation to the service life of a component. Welding is one of the common repair methods used on gas turbine engine components that develops high residual stress, and uncontrolled residual stress may appear in several manufacturing processes which involves uneven distribution of heat, mainly in a localised manner (i.e. at the cutting/welding tip/zone). This study is mainly focused on the estimation of the surface residual stress after welding on aerospace material; here X-Ray diffraction (XRD) is used for analysis since it is an accurate NDT method used for measuring residual stress. X-ray diffraction is made a semi-destructive method by removing material using electropolishing to micron level for analysis of sub-surface stresses, as X-ray diffraction method has low penetration depth. Residual stress measurement is carried out at surface level and correlated with numerical simulation of residual stress due to welding.

Keywords
Residual Stress, TIG Welding, X-Ray Diffraction, Numerical Simulation, Aerospace Material

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: S. Kumar, A. Crivoi, M.J. Tan, A. Tai, I. Marinescu, ‘Evaluation of Residual Stress by X-Ray Diffraction and Correlative Stress Modelling’, Materials Research Proceedings, Vol. 2, pp 211-216, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-36

The article was published as article 36 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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