许晓静,汪成松,丁清,陈洋,徐驰,黄晶,朱金鑫,杨帆

• 1:江苏大学先进制造与现代装备技术工程研究院

摘要(Abstract)：

以自主熔炼的7085铝合金(Al-7.0Zn-1.41Mg-1.50Cu-0.14Zr-0.023Sr)为实验对象,通过EBSD、XRD、硬度及电导率、拉伸性能、晶间腐蚀及剥落腐蚀试验,研究了热压缩—ECAP—热压缩—预回复—固溶—时效态下7085铝合金不同方向的组织与性能。研究表明:ECAP后续增加的热压缩处理进一步促进了合金的再结晶,消除了大部分ECAP加工后的位错和亚晶,小角度晶界比例提高,平均晶粒尺寸变大。热压缩对合金硬度和电导率峰值大小影响不大,抗拉强度和屈服强度降低,塑性变化不大,同时力学性能的各向异性变大。抗晶间腐蚀性能和抗剥落腐蚀性能均有所提高,但是相比于热压缩—ECAP—预回复—固溶—时效处理,其抗腐蚀性能的各向异性变大。

关键词(KeyWords)： 7085铝合金;ECAP;微观组织;各向异性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51074079);; 江苏省高校新能源汽车优势学科资助

作者(Author): 许晓静,汪成松,丁清,陈洋,徐驰,黄晶,朱金鑫,杨帆

DOI: 10.13289/j.issn.1009-6264.2017.02.004

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