摘要
对AZ31镁合金搅拌摩擦焊接头进行力学性能实验。拉伸、疲劳实验结果显示,AZ31镁合金搅拌摩擦焊接头抗拉强度可以达到母材强度的92.9％,断裂位置在前进面的机械热影响区,认为是前进面机械热影响区不均匀的层状组织和应力集中作用的结果。扫描电镜显示:断口有明显的撕裂纹和纤维状组织。
The mechanical properties on friction stir welded AZ31 magnesium alloy joint were studied. The tensile and fatigue testing results show that the strength of friction stir welded AZ31 magnesium alloy joint can reach to 92.9% of the base metal. The fracture location is on the thermal mechanical affected zone in the advancing side. This is because of the unequal stratum structure and the stress concentration on this zone. Obvious tearing crack and fiber tissue was observed by scanning electric microscopy.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2005年第1期33-36,共4页
Journal of Materials Engineering
基金
国家"863"计划资助项目(2002AA331160)
关键词
搅拌摩擦焊
镁合金
力学性能
断口形貌
friction stir welding
magnesium alloy
mechanical property
fractography
