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The effect of vibratory stress on the welding microstructure and residual stress distribution

Munsi, A.S.M.Y. and Waddell, A.J. and Walker, C.A. (2001) The effect of vibratory stress on the welding microstructure and residual stress distribution. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 215 (2). pp. 99-111. ISSN 1464-4207

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Abstract

Previous studies have suggested that weld microstructure may be modified by the presence of static stresses. In this investigation, vibratory stress was applied to mild steel specimens while they were being welded to observe its effect on the residual stress, microstructure and hardness of the material. Residual stresses were found to decrease in response to vibration whether it was applied during welding or after welding. It was found that the applied stress influenced the grain growth process in the weld. As a result of the treatment the hardness of the material was found to be increased by 25 per cent.