Effect of microstructural evolution on mechanical properties of friction stir welded AA2009/SiCp composite

被引：166
作者：
Feng, A. H. [1 ]
Xiao, B. L. [1 ]
Ma, Z. Y. [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2008年 / 68卷 / 09期
关键词：
friction stir welding; metal-matrix composites (MMCS); mechanical properties; powder processing; fracture;
D O I：
10.1016/j.compscitech.2008.03.010
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Extruded AA2009/15%/SiCp composite was friction stir welded (FSW) and subjected to subsequent post-weld T4-treatment. FSW resulted in significant grain refinement, breaking and uniform distribution of SiC particles, dissolution of coarse needle-shaped precipitates and re-precipitation in the nugget zone, thereby increasing the hardness and longitudinal and transverse strengths of the as-FSW composite joint remarkably. Post-weld T4-treatment resulted in limited grain growth and improved weld strength. Under the T4 condition, the longitudinal and transverse tensile strengths of the weld reached 82% and 95% of the base metal, respectively. The low joining efficiency under the T4 condition was associated with the formation of the Cu2FeAl7 phase. (c) 2008 Elsevier Ltd. All rights reserved.
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页码：2141 / 2148
页数：8
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