时效处理对7N01铝合金应力腐蚀性能的影响  

Influences of Aging Treatments on Stress Corrosion Properties of 7N01 Aluminum Alloy

作　　者：张婷[1] 孙祥[1] 何欢[1,2] 符跃春[1] 

机构地区：[1]广西大学材料科学与工程学院,有色金属及材料加工新技术教育部重点试验室,广西南宁530004 [2]广西理工职业技术学院科学试验中心,广西南宁530004

出　　处：《热加工工艺》2016年第24期181-184,共4页Hot Working Technology

基　　金：广西理工科学实验中心项目(YXKT2014024);广西壮族自治区教育厅高校科研项目(YB2014013)

摘　　要：采用慢应变速率拉伸试验(SSRT),研究了自然时效、单级时效和双级时效对7N01铝合金在不同介质环境下应力腐蚀开裂(SCC)敏感性的影响。结果表明,7N01铝合金的SCC敏感性与时效处理密切相关,影响敏感性的次序由低到高依次为:双级时效、单级时效、自然时效;腐蚀介质的腐蚀性越强,SCC敏感性越高。7N01铝合金的慢应变速率拉伸断裂均为韧窝型延性断裂。The influences of the natural aging, single stage aging and double stage aging on the stress corrosion cracking （SCC） susceptibility of 7N01 aluminum alloy under different medium environments were investigated using the slow strain rate test （SSRT）. The results show that the SCC susceptibility of 7N01 aluminum alloy is closely related to the aging treatment, and the order of influence sensitivity from low to high is the double stage aging, single stage aging and natural aging. The stronger the corrosive medium is, the higher the SCC sensitivity is. The SSRT tensile fractures of 7N01 aluminum alloys are dimple ductile fracture.

关 键 词：7N01 铝合金 时效处理 应力腐蚀开裂敏感性 

分 类 号：TG146.21[一般工业技术—材料科学与工程]