Achieving homogeneity in a two-phase Cu-Ag composite during high-pressure torsion

被引：16
作者：
Tian, Y. Z. [1 ]
Zhang, Z. F. [1 ]
Langdon, T. G. [2 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Univ Southampton, Mat Res Grp, Fac Engn & Environm, Southampton SO17 1BJ, Hants, England
[3] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[4] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
来源：
JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 13期
基金：
中国国家自然科学基金; 欧洲研究理事会;
关键词：
SEVERE PLASTIC-DEFORMATION; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; REFINEMENT; PATTERNS; BEHAVIOR; ALLOYS;
D O I：
10.1007/s10853-012-7105-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A Cu-8 wt%Ag alloy was processed at room temperature either by high-pressure torsion (HPT) or using a two-step deformation mode of equal-channel angular pressing (ECAP) and HPT. After HPT deformation, different flow patterns were observed on the disk surface without any post-deformation treatment thereby indicating an inhomogeneous shearing deformation. The microhardness distributions throughout the disks were compared after the two different processing routes. It is shown that the microhardness remains very low near the center of the disk although saturated in the outer regions after 10 revolutions. By contrast, an intrinsically homogeneous microhardness may be attained throughout the disk after the two-step deformation of ECAP and HPT. This study suggests a convenient procedure for achieving full homogeneity in high-strength materials during HPT processing.
引用
收藏
页码：4606 / 4612
页数：7
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