Equal-Channel Angular Pressing as a New Processing to Control the Microstructure and Texture of Metallic Sheets

作     者：Tong Xiao Hiroyuki Miyamoto Toshiyuki Uenoya 

作者机构：Department of Mechanical Engineering Doshisha University Kyoto Japan 

出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)

年 卷 期：2012年第3卷第9期

页      面：600-605页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Severe Plastic Deformation Equal-Channel Angular Pressing (ECAP) Recrystallisation Texture Ferritic Stainless Steel Strain Path 

摘      要：The extended band structures of as-cold-rolled high Cr steel sheets are recrystallisation-resistant, and tend to become aggregates of the so-called grain colonies as a partially recovered state after final annealing. Such band structures diminish formability and become origin of the so-called ridging. A novel processing will be shown here, which involves strain-path change by introducing one-pass ECAP prior to cold-rolling, and facilitates recrystallisation. Indeed, the recrystallisation temperature was reduced by 100℃, compared with cold-rolling alone imposing an equivalent strain. Grain- scale microshear bands introduced during one-pass ECAP perturbed the banded structures in post-ECAP cold-rolling and enhanced the recrystallisation at the final annealing.