祁文娟,宋仁国,祁星,金骥戎,王超,李海

• 1:常州大学材料科学与工程学院腐蚀与防护研究所
• 2:江苏省材料表面科学与技术重点实验室

摘要(Abstract)：

采用电化学阴极渗氢、慢应变速率拉伸试验(SSRT)、定氢仪和扫描电子显微镜(SEM)研究了不同时效状态7050铝合金的氢致开裂行为,并应用自由电子理论计算了氢对铝合金晶界上原子结合力的影响。结果表明:氢在铝合金晶界上发生了偏聚,氢的偏聚增大了晶胞点阵常数,降低了晶界原子的平均结合能和原子间的结合力,从而使合金氢脆敏感性(IHE)增加。时效程度对7050铝合金的IHE有很大的影响。在同一充氢条件下,欠时效状态下的铝合金氢含量最大,氢脆效应也最明显,过时效氢含量最低,氢脆效应最弱,峰时效居中。

关键词(KeyWords)： 7050铝合金;时效;氢致开裂;氢脆;自由电子理论

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51371039)

作者(Author): 祁文娟,宋仁国,祁星,金骥戎,王超,李海

DOI: 10.13289/j.issn.1009-6264.2014.11.011

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