Structural response of metals to friction stir welding

M.Y. Sergey1, Y. Sato1, H. Kokawa1*
1Department of Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aramaki-aza-Aoba, Sendai 980-8579, Japan
Abstract
 The general trends of grain structure development during friction stir welding (FSW) were studied. The microstructure evolution at relatively low welding temperatures was shown may be primarily governed by grain subdivision. At elevated temperatures, however, discontinuous recrystallization may play a key role. Inhomogeneous microstructure distribution was revealed in stir zone.

Received: 11 May 2014   Accepted: 27 July 2014
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