Fusion and friction stir welding of aluminum-metal-matrix composites

被引：163

作者：

Storjohann, D

Barabash, OM

Babu, SS ^{[1
]}

David, SA

Sklad, PS

Bloom, EE

机构：

[1] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA

[2] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

[3] Edison Welding Inst, Columbus, OH 43017 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2005年 / 36A卷 / 11期

基金：

美国能源部;

关键词：

D O I：

10.1007/s11661-005-0093-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure evolutions and degradations of aluminum-metal-matrix composites during fusion welding were studied and compared with thermodynamic calculations. In fusion welds of Al2O3-reinforced composites, the decomposition of Al2O3 was observed. In fusion welds of SiC whisker-reinforced composites, the decomposition of SiC to Al4C3 + Si by reaction with molten aluminum occurred. These phenomena led to unacceptable fusion welds in aluminum metal-matrix composites. Successful welds were produced in the same composites by friction stir welding (FSW). Significant reorientation of SiC whiskers close to the boundary of the dynamically recrystallized and thermomechanically affected zone (TMAZ) was observed. The small hardening in the dynamically recrystallized region was attributed to the presence of dislocation tangles in between SiC whiskers.

引用

页码：3237 / 3247

页数：11

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