Journal
CIRP ANNALS-MANUFACTURING TECHNOLOGY
Volume 57, Issue 1, Pages 287-290Publisher
TECHNISCHE RUNDSCHAU EDITION COLIBRI LTD
DOI: 10.1016/j.cirp.2008.03.035
Keywords
friction stir welding; residual stress; microstructure
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In friction stir welding and processing both a thermal flux and a mechanical action are exerted on the material determining metallurgical evolutions, changes in the mechanical behaviour and a complex residual stress state. In the paper, the metallurgical changes are examined through numerical simulation and experiments to highlight and distinguish the effects of thermal and mechanical loadings. A particular focus is made on the residual stresses generated during the stir processing of AA7075-T6 aluminium blanks. The predictions of FE model are validated by experimental measurements. Lastly, this paper presents an in-process quenching of the processed blanks for improved mechanical properties and microstructure. (c) 2008 CIRP.
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