ECAP变形与材料组织性能控制的研究

Study of ECAP and Control of Materials Structure and Property

等径弯曲通道变形(ECAP)是制备超细晶材料的新工艺,其基本原理是将试样放入横截面形状完全相同、并成一定角度的弯曲通道中,试样在压力作用下通过通道时,在通道弯曲处产生一定量均匀的纯剪切变形,最终获得很高的变形量,使材料组织发生明显细化。详细介绍了ECAP变形工艺路线对晶粒细化的影响,以及ECAP变形制备超细晶材料的显微组织特征及其力学性能。

Equal Channel Angular Pressing（ECAP） is a new processing procedure fabricating ultrafine grain material, whose basic principle is that sample is embedded into the bending passage which has the same cross-section shape. When sample goes through the bending passage under pressure function, it is subjected to a very intense plastic strain by pressing it through the bending location of passage, which makes material microstructure thin obviously. The development of ECAP, the influence of processing technology on grain refinement, the microstructures and performances ECAP ultrafine grain materials are introduced.