毛晓东,李英东,陈振宁,刘贞山,谷宁杰,赵丕植,王国军

• 1:中铝材料应用研究院有限公司

摘要(Abstract)：

采用显微硬度仪、拉伸试验和晶间腐蚀浸泡试验等研究了185℃时效时间对6014-T4P铝合金板材硬度、力学性能和晶间腐蚀敏感性的影响，采用透射电镜观察了合金晶内和晶界析出相形貌，以阐明晶间腐蚀机理。结果表明：随着时效时间的增加，合金的硬度及抗拉强度呈先升高后保持稳定最终有所下降的变化规律，断后伸长率逐渐下降。合金的晶间腐蚀敏感性呈先升高后降低的趋势，在时效时间为500 min时电位最负、晶间腐蚀敏感性最高。随着时效时间的延长，合金的腐蚀类型由最初的点蚀转变为连续晶间腐蚀最终变为局部斑状腐蚀，这与晶界析出相的形貌及无沉淀析出带(PFZ)的宽度紧密相关。

关键词(KeyWords)： 6014铝合金板材;时效时间;力学性能;晶间腐蚀

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2021YFB3704200)

作者(Author): 毛晓东,李英东,陈振宁,刘贞山,谷宁杰,赵丕植,王国军

DOI: 10.13289/j.issn.1009-6264.2023-0032

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