许晓静,朱金鑫,杨帆,丁清,汪成松,韩天

• 1:江苏大学先进制造与现代装备技术工程研究院

摘要(Abstract)：

采用X射线衍射分析(XRD)、电子背散射衍射分析(EBSD)、电导率测试、硬度测试、拉伸试验、晶间腐蚀试验和剥落腐蚀试验等方法,研究了预回复工艺对7085铝合金组织与性能的影响。结果表明,固溶前的预回复处理对合金的晶体取向存在一定影响,降低了位错密度,细化了晶粒尺寸(平均晶粒尺寸从7.414μm降到6.809μm),提高了硬度(从199.0 HV提高到212.5 HV)、屈服强度(从481.2 MPa提高到552.4 MPa)、抗拉强度(从528.2 MPa提高到582.0 MPa)。此外,预回复处理明显提高了合金的抗晶间腐蚀性能,但是合金的电导率略有降低,抗剥落腐蚀性能也略微下降。定量分析显示,预回复显著提高了固溶强化和时效沉淀强化的总和,这也是合金强度提高的主要原因。抗剥落腐蚀性能的降低可以归因于合金低角度晶界百分比的降低。

关键词(KeyWords)： 7085铝合金;预回复工艺;大变形;强化机理

Abstract:

Keywords:

基金项目(Foundation): 江苏省工业科技支撑计划项目(BE2008118);; 江苏大学“拔尖人才培养工程基金”(1211110001);; 江苏省高校研究生科研创新计划项目(CXLX12_0620)

作者(Author): 许晓静,朱金鑫,杨帆,丁清,汪成松,韩天

DOI: 10.13289/j.issn.1009-6264.2016.11.010

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