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Friction stir welding of AZ31 magnesium alloy rolled sheets: Influence of processing parameters

Article dans une revue avec comité de lecture
Author
COMMIN, Loreleï
ccDUMONT, Myriam
199957 Institut des Matériaux, de Microélectronique et des Nanosciences de Provence [IM2NP]
ccMASSE, Jean-Eric
211915 Mechanics surfaces and materials processing [MSMP]
BARRALLIER, Laurent

URI
http://hdl.handle.net/10985/8435
DOI
10.1016/j.actamat.2008.09.011
Date
2009
Journal
Acta Materialia

Abstract

The temperature evolution during friction stir welding (FSW) and the resulting residual stresses of AZ31 Mg alloy were studied to get a better understanding of the mechanisms involved in this process. The relationship between the processing parameters, the heat and plastic deformation produced and the resulting microstructure and mechanical properties was investigated. Increasing the shoulder diameter or the tool rotation speed or decreasing the welding speed produced an increase in the heat generated during the process and then promoted grain growth. The temperature distribution on the advancing side and on the retreating side differed, and stress levels were higher on the retreating side. The grain size heterogeneity produced by FSW was not the prevailing cause of failure.

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