(西北工业大学 材料学院，西安 710072)
摘 要: 等通道转角挤压( Equal channel angular pressing，ECAP)是一种通过纯剪切变形制备高性能材料的独特的加工方法，它可以有效地细化合金组织，得到具有高强度和优异超塑性能的超细晶材料。综述钛及钛合金等通道转角挤压(ECAP)工艺的晶粒细化机理、变形特点和影响晶粒细化的因素，讨论ECAP工艺存在的主要问题，并对ECAP工艺的前景进行展望。
关键字: 等通道转角挤压(ECAP)；纯剪切变形；晶粒细化；细化机理；影响因素
titanium and titanium alloy
（School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:Equal channel angular pressing (ECAP) is a unique processing method for preparing high-performance material by pure-shear deformation, which can effectively refine the grain of alloy and obtain ultra-fine grained materials with high strength and excellent superplasticity. An overview of the grain refinement mechanism, the deformation characteristics and the factors influencing grain refinement during ECAP process of titanium and titanium alloy was given, and the main problems of ECAP were discussed and prospects of ECAP were presented.
Key words: ECAP; pure-shear deformation; grain refinement; refining mechanism; influence factors
