摘要
为了研究推进剂贮箱用2A14铝合金接头介质相容性,分析了铝合金的应力腐蚀机理,以2A14-T6铝合金本体、搅拌摩擦焊(FSW)接头和变极性氩弧焊(VPTIG)接头为研究对象,通过慢应变速率拉伸法进行应力腐蚀试验研究。结果表明,2A14铝合金在3.5%NaCl溶液中存在应力腐蚀现象,FSW接头的抗腐蚀性能优于VPTIG接头。。
In order to study the compatibility of 2A14 alloy joint used on propellant tank, stress corrosion mech- anism of aluminum alloy was analysized in this paper. The base metal, FSW joint and VPTIG joint of 2A14-T6 alumi- num alloy were chosen to make corrosion experimentation with slow strain rate method. The result shows 2A14 alumi- num alloy have stress corrosion tendency in 3.5% NaC1 solution. And the corrosion resistance of FSW joint is better than VPTIG joint.
出处
《宇航材料工艺》
CSCD
北大核心
2017年第2期43-46,55,共5页
Aerospace Materials & Technology
关键词
铝合金
应力腐蚀
慢应变速率法
Aluminum alloy, Stress corrosion, Slow strain rate method.