摘要
综述了块体纳米材料大塑性变形(SPD)制备技术的工作原理及分类。SPD技术按材料的细化机制一般可分为大塑性扭转挤压法(SPTS)、等径角挤压法(ECAP)和多重锻压法(Multi-forging)。重点讨论了SPTS和ECAP工艺的切变机制及其工艺参数,同时分析了这两种工艺的优缺点,并在此基础上提出了一些解决方案。
The processing principle and classification of severe plastic deformation （SPD） for fabricating bulk nanocrystalline materials are summarized in the present paper. SPD technologies are commonly classified into severe plastic torsion straining （SPTS）, equal channel angular pressing or extrusion （ECAP or ECAE） and multi-forging according to the ultra-fining mechanism of processed materials. The shearing mechanism and technique parameters of SPTS and ECAP as well as their advantages and disadvantages are discussed. At the same time, some solutions are brought forward on the basis of above discussions.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2008年第1期90-93,101,共5页
Materials Reports
关键词
块体纳米品材料
大塑性扭转挤压
等径角挤压
bulk nanocrystalline materials, severe plastic torsion straining, equal channel angular pressing
