Tensile properties and fatigue strength of ultrafine grained pure copper

被引：0
|
作者：
Goto, M. [1 ]
Han, S-Z. [2 ]
Kim, S-S. [3 ]
Kawagoishi, N. [4 ]
Lim, C-Y. [2 ]
机构：
[1] Oita Univ, Dept Mech Engn, Oita 8701192, Japan
[2] Korea Inst Machinary & Mat, Chang Won 641010, South Korea
[3] Gyeongsang Natl Univ, Engn Res Inst, Chinju 660701, South Korea
[4] Kagoshima Univ, Dept Mech Engn, Kagoshima 8900065, Japan
来源：
PROGRESSES IN FRACTURE AND STRENGTH OF MATERIALS AND STRUCTURES, 1-4 | 2007年 / 353-358卷
关键词：
ultrafine grained copper; fatigue; tensile strength; equal channel angular pressing;
D O I：
10.4028/www.scientific.net/KEM.353-358.1649
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Oxygen-free copper was processed by equal channel angular pressing with different numbers of ECAP process cycles, NP. Tensile strength was increased with an increase in NP, but it tended to saturate after NP = 4. Conversely, elongation was dramatically decreased by first pressing, but it tended to saturate up to NP = 3, followed by slight increasing trend after NP = 4. Fatigue tests of specimens processed with NP = 4 and 8 were performed. The change in surface morphologies during fatigue was monitored successively. In addition to this, the change in surface hardness was measured. Significant decrease in surface hardness due to cyclic stresses was measured. The physical basis of fatigue damage of UFG copper was discussed based on the experimental results.
引用
收藏
页码：1649 / +
页数：2
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