摘要
由于镁合金的Hall-Petch常数比铝合金大,所以晶粒细化对其综合力学性能的改善有很大的影响。通过评述镁合金晶粒细化方法,包括液态凝固过程的细化晶粒法,如异质形核法、快速冷却法、附加振动法、半固态成形晶粒细化法等,和固态成形过程的细化晶粒法,如等通道转角挤压技术、高压扭转技术、大应变轧制技术等,详细阐述了镁合金晶粒细化的研究进展、力学性能提高的途径和镁合金晶粒细化的机理,为进一步研究和开发绿色高效的镁合金晶粒细化技术提供参考。
Since the magnesium alloys has a larger value of Hall-Petch constant than aluminum alloys, the degree of grain refinement has a significant influence on the improvement of the mechanical properties of alloys. This paper present a brief review on the grain refinement methods for magnesium alloys, including grain refinements in liquid solidification process, such as heterogeneous nucleation, rapidly cooling, additional vibration, semi-solid forming, and in solid forming process, such as equal channel angular extrusion, high pressure torsion, and large strain rolling, so as to expound the research progress of grain refinement methods for magnesium alloys, the most attractive ways of the improvement of the mechanical properties and the mechanism of the grain refinement of magnesium alloys, which will contribute to a better understanding of the factors controlling grain refinement and provide an outlook for the future research and development of green and efficient grain refinement techniques of magnesium alloys.
作者
张玲
李英龙
ZHANG Ling;LI Ying-long(School of Mechanical and Engineering,Ningxia Institute of Technology,Shizuishan 753000,Ningxia,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《铸造》
CAS
北大核心
2019年第11期1195-1203,共9页
Foundry
基金
国家自然科学基金（11574043
U1760105）
关键词
镁合金
晶粒细化
液态凝固
固态成形
研究进展
magnesium alloy
grain refinement
liquid solidification
solid forming
research progress
作者简介
张玲(1983-),女,博士生,研究方向为镁合金凝固及成形技术与装备。电话:15121929297,E-mail:120844967@qq.com;通讯作者:李英龙,男,博士生导师,教授。电话:13998842767,E-mail:liyl@mail.neu.edu.cn。
