Microstructure and mechanical property studies of AA6056 friction stir welded plate

被引:87
作者
Cabibbo, M.
McQueen, H. J. [1 ]
Evangelista, E.
Spigarelli, S.
Di Paola, M.
Falchero, A.
机构
[1] Concordia Univ, Montreal, PQ H3G 1M8, Canada
[2] Univ Politecn Marche, Dipartimento Meccan, I-60131 Ancona, Italy
[3] Alenia Aeronaut, I-10146 Turin, Italy
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2007年 / 460卷 / 86-94期
关键词
friction stir welding; Al-Mg-Si alloy; grain structures; substructures; nugget TMAZ; TEM; geometric dynamic recrystallization;
D O I
10.1016/j.msea.2007.01.022
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The microstructure and mechanical properties of a friction stir welded 6056-T6 aluminum alloy plate were investigated by using polarized optical and transmission electron microscopy techniques. The microstructure revealed different grain morphologies in the thermo-mechanically affected zones, in proximity of the weld nugget; the advancing side bad fairly elongated, bent grains, whilst the broader retreating side had more elongated, narrower grains. On both sides in approach to the nugget zone, grain subdivision rose with shear strain despite rising temperature. Overaged precipitates in both thermo-mechanically affected zones are associated with minima in hardness. Tensile tests showed yield and ultimate strength slightly lower across the weld compared to the parent material as well as a reduction in ductility of the weld region. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:86 / 94
页数:9
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