摘要
系统地研究了单级时效和双级时效对Al 1.12Mg 0 .6 6Si 0 .8Cu合金时效组织和机械性能的影响。通过拉伸强度和延伸率的测试以及TEM观察 ,表明单级时效为该合金较为理想的热处理制度 ,合金经 190℃时效 4h后具有较好的综合性能 ;合金经双级时效处理后 ,预时效期间所形成的过渡相对二次时效中相的析出和材料性能有较大影响。
The effect of different ageing treatment on the mechanical properties and microstructure of Al 1.12Mg 0.66Si 0.8Cu was investigated systematically. It's shown that the best heat treatment of the alloy was under ageing at 190 ℃ for 4 hours, and the optimum combination of strength and ductility for the alloy could be obtained, while preageing treatment greatly influenced the mechanical properties of the alloy,TEM observation shows that the change of properties could be attributed to the distribution and morphology of β' precipitation.
出处
《矿冶工程》
CAS
CSCD
北大核心
2001年第4期80-82,共3页
Mining and Metallurgical Engineering
