High strength and good electrical conductivity in Cu-Cr alloys processed by severe plastic deformation

被引：99

作者：

Dobatkin, S. V. ^{[1
,2
]}

Gubicza, J. ^{[3
]}

Shangina, D. V. ^{[1
,2
]}

Bochvar, N. R. ^{[1
]}

Tabachkova, N. Y. ^{[2
]}

机构：

[1] Russian Acad Sci, AA Baikov Inst Met & Mat Sci, Moscow 119991, Russia

[2] Natl Univ Sci & Technol MISiS, Lab Hybrid Nanostruct Mat, Moscow 119049, Russia

[3] Eotvos Lorand Univ, Dept Mat Phys, Budapest, Hungary

来源：

MATERIALS LETTERS | 2015年 / 153卷

基金：

俄罗斯基础研究基金会; 匈牙利科学研究基金会;

关键词：

Cu-Cr alloys; High pressure torsion; Ultrafine-grained structure; Hardness; Electrical properties; X-ray techniques; HIGH-PRESSURE TORSION; ZR ALLOY; CHROMIUM-BRONZE;

D O I：

10.1016/j.matlet.2015.03.144

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrafine-grained (UFG) microstructures in Cu-Cr alloys were processed by high pressure torsion (HPT). The improved hardness was accompanied by a reduced electrical conductivity due to the large amount of grain boundaries. The effect of heat-treatment after HPT-processing on the hardness and the electrical conductivity was studied for different chromium contents (0.75, 9.85 and 27 wt%). For low Cr concentration (0.75%) the electrical conductivity increased considerably above 250 degrees C, however the hardness decreased concomitantly. At the same time, for high Cr content (9.85% and 27%) the hardness was only slightly reduced even at 500 degrees C, while the electrical conductivity increased to a similar level as before HPT due to grain boundary relaxation and decomposition of Cu-Cr solid solution. Our study demonstrates the capability of SPD-processing and subsequent heat-treatment to achieve a combination of high strength and good electrical conductivity. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：5 / 9

页数：5

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