Observation of macroscopic shear band in aluminum-based alloy during equal-channel angular pressing

被引：0
|
作者：
王立忠
王经涛
郭成
陈金德
机构：
[1] China
[2] Department of Materials Science and Engineering
[3] Nanjing 210094
[4] Nanjing University of Science and Technology
[5] School of Mechanical Engineering
[6] Xi′an 710049
[7] Xi′an Jiaotong University
来源：
Transactions of Nonferrous Metals Society of China | 2004年 / 05期
关键词：
equal-channel angular pressing(ECAP); macroscopic shear banding; ultrafine grained material;
D O I：
暂无
中图分类号：
TG376.3 [冷挤压];
学科分类号：
080201 ; 080503 ;
摘要：
Equal-channel angular pressing(ECAP) is now recognized as an effective technique for fabricating ultrafine grained materials. The results show that prevalent macroscopic shear banding occurs in ECAP as long as the pressing passes reach 2, and the severe macroscopic shear band extends from bottom to top surface and slants to the longitudinal axis of specimen at an angle of about 45°, develops at regular intervals, with a high shear strain accommodation of about 3.7 within the band. Different families of macroscopic shear bands may cut across each other, and over 60% of sample volume is occupied by macroscopic shear band when the ECAP reaches 4 passes.
引用
收藏
页码：957 / 960
页数：4
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