摘要
通过拉伸性能测定、电导率测定、显微组织结构分析等方法,研究了不同单级时效处理条件下Al-4.3Zn-1.4Mg铝合金的力学性能、电导率和显微组织结构。结果表明,试验铝合金的峰时效(T6)制度为120℃24 h,该铝合金的抗拉强度达到438 N/mm2,基体内有大量细小的沉淀相析出,晶界析出相呈连续分布。120℃过时效处理后,晶界析出相呈断续分布,有明显的晶界无析出带。
The mechanical properties,electroconductivity and microstructure of Al-4.3Zn-1.4Mg alloy sheets which were single-aging treated with different processes,have been analyzed by tensile tester,electro-conductivity measurement instrument and microscope.The results show that the peak strength can reach to 438 MPa at 120 ℃ 24 h aging treatment（T6）,there are lots of tiny precipitation phases and the precipitation phases are distributed at the grain boundary continuously.The precipitation phases at grain boundary will be discontinuously and non-precipitation strip zone at grain boundary appeared while over-aged at 120℃.
出处
《轻合金加工技术》
CAS
北大核心
2011年第1期25-28,共4页
Light Alloy Fabrication Technology
基金
国家高技术研究发展计划项目(2008AA030701)
