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Generally, the manufacturing processes of machine component introduce residual stresses (RS) that have an essential influence on their behaviour during service life. The purpose of this study is to evaluate the residual stress distribution of specimens joined by using high power diode laser welding. Non-destructive methods for detection and measurement of RS have been increasingly used in the last few years. The paper outlines the capability of X-ray diffraction (XRD), which can be used for quantitative analysis of macro and micro level RS separately, to describe a state of residual stresses of high pressure welds. The results show from this paper that laser welding has application potential in the welding of high pressure steels.

X-ray diffraction study of residual stress distribution on surface of laser welded steel sheets