Effects of Cold Rolling on the Microstructure and Mechanical Properties of High-Zn-Content Al-Zn-Mg-Sc Alloys

被引：0
作者：
J. J. Xiao
C. Y. Liu
K. Cao
机构：
[1] Guilin University of Technology,Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education
来源：
Journal of Materials Engineering and Performance | 2024年 / 33卷
关键词：
Al-Zn-Mg-Sc alloy; mechanical properties; microstructure; rolling;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this study, the effects of chemical composition and process routes on the microstructure and mechanical properties of high-Zn-content Al-Zn-Mg-Sc alloys were investigated. Aging led to the formation of nano-sized Zn phases in the grain interior and large Zn phases at the grain boundary (GB) or Al/Al3Sc interfaces in the Al-20Zn-0.5Mg-0.5Sc (20Zn-0.5Mg) alloy, and cold rolling before aging (Pre-CR) could accelerate this precipitation. Compared with the 20Zn-0.5Mg alloy, the Al-15Zn-1Mg-0.5Sc (15Zn-1Mg) alloy exhibited a more difficult Zn phase precipitation during aging, and only pre-CR could lead to the formation of intracrystalline Zn phases in this alloy during artificial aging. The transition of the η′ phases into η phases without coarsening of Zn phases occurred at the GB or Al/Al3Sc interfaces of the 15Zn-1Mg alloy during artificial aging. Pre-CR could improve the mechanical properties of high-Zn-content Al-Zn-Mg-Sc alloys, and the significant evolution of Zn phases in the 20Zn-0.5Mg alloy during processing in different routes conferred this alloy a wider range of mechanical properties than the 15Zn-1Mg alloy.
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页码：1250 / 1261
页数：11
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