镁合金大塑性变形技术的研究进展

相比于变质处理、快速凝固、粉末冶金等方法,大塑性变形技术(severe plastic deformation,SPD)因具有独特的受力状态和较大的累积应变量而易获得超细晶组织及优异的力学性能,因此,SPD方法在高性能镁合金制备及加工方面显示出了明显的技术优势和发展前景.本文重点阐述了等通道转角挤压、往复挤压和高压扭转等典型镁合金SPD技术的研究概况,明确了镁合金SPD技术未来的向纵深方向发展的潜力所在.

Progress in Severe Plastic Deformation of Magnesium Alloy

Compared to the modification, rapid solidification, powder metallurgy method, severe plastic de- formation （SPD） technique can get uhrafine grain structure and excellent mechanical properties easier for the rea- son of the unique force state and larger cumulative strain. So, SPD method shown in the preparation and processing of high-performance magnesium alloys has obvious technical advantages and development prospects. This paper fo- cuses on the research survey of some typical magnesium alloy SPD technology such as the equal channel angular pressing, cyclic extrusion-compression and high pressure and torsion to make the potential of magnesium alloy SPD technology in further development clear.