Author： Grujicic M. Arakere G. Yalavarthy H. He T. Yen C.-F. Cheeseman B.
Publisher： Springer Publishing Company
ISSN： 1059-9495
Source： Journal of Materials Engineering and Performance, Vol.19, Iss.5, 2010-07, pp. : 672-684
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Abstract
A concise yet a fairly comprehensive overview of the friction stir welding (FSW) process is provided. This is followed by a computational investigation in which FSW behavior of a prototypical solution-strengthened and strain-hardened aluminum alloy, AA5083-H131, is modeled using a fully coupled thermo-mechanical finite-element procedure developed in our prior study. Particular attention is given to proper modeling of the welding work-piece material behavior during the FSW process. Specifically, competition and interactions between plastic-deformation and dynamic-recrystallization processes are considered to properly account for the material-microstructure evolution in the weld nugget zone. The results showed that with proper modeling of the material behavior under high-temperature/severe-plastic-deformation conditions, significantly improved agreement can be attained between the computed and measured post-FSW residual-stress and material-strength distribution results.
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