Refinement and Coarsening of Grains Caused by Tensile-Shear Tests in Ultra-Fine Grained Cu Processed by Severe Plastic Deformation

被引：2

作者：

Matsutani, Ryosuke ^{[1
]}

Miyajima, Yoji ^{[1
]}

Onaka, Susumu ^{[1
]}

机构：

[1] Tokyo Inst Technol, Sch Mat & Chem Technol, Dept Mat Sci & Engn, Yokohama, Kanagawa 2268502, Japan

来源：

MATERIALS TRANSACTIONS | 2019年 / 60卷 / 05期

关键词：

copper; ultra-fine grain; equal channel angular pressing; microstructure; electron back scatter diffraction; grain refinement; EVOLUTION; STRESS;

D O I：

10.2320/matertrans.M2018379

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultra-fine grained pure copper fabricated by equal-channel angular pressing was used as a sample. We made tensile-shear tests using specimens with notches cut from the sample and large shear deformation occurred between the notches. Microstructural changes between the notches caused by the large shear deformation were observed. Using micro scale lattices scribed on the surface of the specimen, we found both refinement and coarsening of grains caused by the large shear deformation. Although severe plastic deformation causes ultra-fine grained structure, it is known there is a limit of the grain refinement. The grain coarsening observed in the present study is considered to be the reason of the limit of the grain refinement caused by severe plastic deformation.

引用

页码：751 / 757

页数：7

共 17 条

[11] Deformation macrolocalisation and fracture in ultrafine-grained armco iron [J].