赵晓燕,宋航,王旭

• 1:辽宁石油化工大学石油天然气工程学院
• 2:天津航天长征技术装备有限公司

摘要(Abstract)：

采用光学显微镜、电化学测试技术、慢应力应变拉伸(SSRT)方法以及扫描电镜研究了不同时效工艺对轧制态7075铝合金微观组织和腐蚀行为的影响。结果表明:不同时效工艺处理后,轧制态7075铝合金在1.5%NaCl溶液中的极化曲线均表现出钝化特征;单级时效的合金,晶界呈连续分布,强度最大,耐蚀性和抗应力腐蚀开裂(SCC)敏感性最差;双级时效的合金,晶界呈断续分布,强度有所减小,耐蚀性和抗SCC敏感性增强;三级时效的合金,具有再结晶组织,晶界呈断续分布,既具有单级时效的强度,又具有最好的耐蚀性和抗SCC敏感性。

关键词(KeyWords)： 7075铝合金;电化学;时效工艺;应力腐蚀开裂

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51201009);; 辽宁省自然科学基金(2013020078)

作者(Author): 赵晓燕,宋航,王旭

DOI: 10.13289/j.issn.1009-6264.2017-0434

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