Remarkable transitions of yield behavior and Luders deformation in pure Cu by changing grain sizes

被引：132

作者：

Tian, Y. Z. ^{[1
]}

Gao, S. ^{[2
]}

Zhao, L. J. ^{[3
]}

Lu, S. ^{[4
]}

Pippan, R. ^{[5
]}

Zhang, Z. F. ^{[1
]}

Tsuji, N. ^{[6
]}

机构：

[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China

[2] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan

[3] Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA

[4] Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland

[5] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[6] Kyoto Univ, Sakyo Ku, ESISM, Yoshida Honmachi, Kyoto 6068501, Japan

来源：

SCRIPTA MATERIALIA | 2018年 / 142卷

基金：

中国国家自然科学基金; 日本学术振兴会;

关键词：

Cu; Ultrafine-grain (UFG); High-pressure torsion (HPT); Yield; Hiders band; HIGH-PRESSURE TORSION; PLASTIC-DEFORMATION; FLOW-STRESS; AL-ALLOY; COPPER; STRENGTH; DUCTILITY; ALUMINUM; MICROSTRUCTURES; METAL;

D O I：

10.1016/j.scriptamat.2017.08.034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fully recrystallized ultrafine-grained (UFG) pure Cu specimens were fabricated by high-pressure torsion (HPT) and controlled annealing. The recrystallized UFG Cu with a minimum mean grain size of 0.51 pm showed high yield strength, good ductility, obvious yield drop and large Liiders strain during tensile test. The mechanical behavior of the Cu specimen became sensitive to the change in the grain size from 0.2 pm to 4.2 pm. The continuous transitions of yield behavior and Luders deformation with grain sizes were discussed. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：88 / 91

页数：4

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