Microstructure evolution during FSW/FSP of high strength aluminum alloys
Microstructure evolution during FSW/FSP of high strength aluminum alloys
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DOI：
10.1016/j.msea.2005.06.009
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发表时间：
2005-09-25
期刊：
影响因子：
6.4
通讯作者：
Sterling, CJ
中科院分区：
文献类型：
--
作者：
Su, JQ;Nelson, TW;Sterling, CJ
研究了搅拌摩擦加工7075铝合金后不同区域的显微组织特征。揭示了搅拌摩擦焊（FSW）/FSP过程中的组织演变规律。在不同的阶段，包括dDRX，晶粒生长，位错引入，动态恢复（DRV）和cDRX的多机制，被发现是固有的过程中。由于该工艺引入了不均匀的塑性变形，最终组织中的单个晶粒经历了不同的演变机制。这些都是从最初的再结晶晶粒的生长或在DRV过程中形成的亚晶粒的cDRX的结果。加工区内的晶粒呈现不同的位错密度和不同程度的回复。(c)2005 Elsevier B.V保留所有权利。
Microstructural characteristics of friction stir processed (FSP) 7075 Al samples in different regions behind the pin tool were investigated. Furthermore, the microstructure evolutions during friction stir welding (FSW)/FSP has been revealed. Multi-mechanisms, including dDRX, grain growth, dislocation introduction, dynamic recovery (DRV) and cDRX, were found to be inherent in the process at different stages. Because inhomogeneous plastic deformation was introduced by the process, individual grains in the final microstructure have undergone different evolution mechanisms. These are either from growth of initially recrystallized grains or are the result of cDRX of subgrains formed during DRV. Grains within the processed region exhibit different densities of dislocations and are in various degrees of recovery. (c) 2005 Elsevier B.V All rights reserved.