程旭辉,毛健,车云,张中可

• 1:四川大学材料科学与工程学院
• 2:贵州省铝材料工程技术研究中心

摘要(Abstract)：

对比研究了211Z铸造试样和热挤压变形试样经峰值时效热处理后的显微组织、晶间腐蚀前后的力学性能变化及晶间腐蚀程度。研究结果表明:铸造试样的晶间腐蚀等级为4级,而挤压试样的晶界腐蚀等级为3级,挤压热处理后在一定程度上改善了211Z合金的抗晶间腐蚀能力,并且经晶间腐蚀后其力学性能的下降程度明显小于铸造试样的。其原因在于:热挤压处理使得晶间沉淀相在晶界上更加弥散分布,降低了晶界无沉淀带的长度和宽度,破坏了晶间腐蚀的连续通道所致。

关键词(KeyWords)： 211Z铝合金;热挤压;晶间腐蚀;显微组织

Abstract:

Keywords:

基金项目(Foundation): 四川省科技支撑计划项目资助(2013GZX0146)

作者(Author): 程旭辉,毛健,车云,张中可

DOI: 10.13289/j.issn.1009-6264.2015.s1.013

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