摘要
采用铸锭冶金法制备了Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr和Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金,采用金相显微镜、扫描电子显微镜和透射电子显微镜研究了2种合金不同处理态的显微组织,测试了不同热处理状态下合金的力学性能和电导率。结果表明:添加微量Sc可以明显细化合金的铸态晶粒,显著提高Al-Zn-Mg-Cu-Zr合金的力学性能和电导率,其作用机理主要为Al3(Sc,Zr)引起的细晶强化、亚结构强化和沉淀强化。
Al-Zn-Mg-Cu-Zr based alloys with or without Sc were produced by ingot metallurgical process. The tensile mechanical properties and electric conductivity of the alloys under different conditions were tested and the microstructures of the alloys were studied by using optical microscope, scanning electron microscope （SME） and transmission electron microscope （rIME.）. The results show that adding trace Sc can greatly decrease the grain size of the Al-Zn-Mg-Cu-Zr alloy ingots and obviously improve the tensile properties and electric conductivity of the Al-Zn-Mg-Cu-Zr alloys. The strengthening mechanism is fine grain strengthening, substructure strengthening and precipitation strengthening caused by Al3 （Sc, Zr）.
出处
《矿冶工程》
CAS
CSCD
北大核心
2005年第5期70-73,共4页
Mining and Metallurgical Engineering
基金
国家重点基础研究发展规划项目(国家973计划项目)(G1999064911-2)
作者简介
戴晓元（1970-），女，湖南桃江人，博士研究生，工程师，研究方向为高性能铝合金。
