等通道转角挤压制备超细晶材料的最新研究进展  

Latest research progress in the preparation of ultra-fine grain materials by equal channel angular pressing

作　　者：张苏鹏 王军丽[2,3] 章震威 郭皆文 史庆南 ZHANG Su-peng;WANG Jun-li;ZHANG Zhen-wei;GUO Jie-wen;SHI Qing-nan(Institute of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China;Analytic and Testing Center of Yunnan Province,Kunming 650093,China;Institute of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Herbert Gleiter Institute of Nanoscience,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明理工大学分析测试研究中心,云南昆明650093 [3]云南省分析测试中心,云南昆明650093 [4]南京理工大学材料科学与工程学院,江苏南京210094 [5]南京理工大学格莱特纳米研究所,江苏南京210094

出　　处：《材料热处理学报》2020年第3期1-14,共14页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51564032);昆明理工大学分析测试基金(2018M20172230122)。

摘　　要：等通道转角挤压(Equal channel angular pressing,ECAP)方法是制备性能优异超细晶材料最常见的大塑性变形方法之一。模角、挤压路径、挤压道次、挤压温度和挤压速度等因素都会影响等通道转角挤压制备超细晶材料的性能;等通道转角挤压的模具也在不断地优化,如背压-等通道转角挤压(Back pressure ECAP,BP-ECAP)模具、可加热的模具以及在等通道转角挤压基础上形成的板材连续剪切技术等,这些新的模具可以改变ECAP变形过程中的组织均匀性。本文综述了等通道转角挤压制备超细晶材料的最新研究进展,并指出了几个需要深入研究的问题及方向。Equal channel angular pressing(ECAP)is one of the most common large plastic deformation methods for preparing ultra-fine grain materials with excellent properties.The modular angle,extrusion path,extrusion pass,extrusion temperature and extrusion speed all affect the properties of ultra-fine grain materials prepared by equal channel angular pressing.The die of ECAP is also constantly optimized,such as back pressure-equal channel angular pressing(BP-ECAP)die,heated die and plate continuous shear technology formed on the basis of ECAP,and these new dies can change the microstructure uniformity in the process of ECAP deformation.In this paper,the latest research progress in the preparation of ultra-fine grain materials by ECAP is reviewed,and several problems and directions that need to be further studied are pointed out.

关 键 词：大塑性变形 等通道转角挤压 晶粒细化 超细晶材料 

分 类 号：TG146.2[一般工业技术—材料科学与工程]