Fatigue notch sensitivity of ultrafine-grained copper

被引：57
|
作者：
Lukás, P [1 ]
Kunz, L [1 ]
Svoboda, M [1 ]
机构：
[1] Acad Sci Czech Republic, Inst Phys Mat, Brno 62100, Czech Republic
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 391卷 / 1-2期
关键词：
ultrafine-grained copper; fatigue notch sensitivity; stability of grain structure;
D O I：
10.1016/j.msea.2004.09.052
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Fatigue notch sensitivity of ultratine-grained (UFG) copper of purity 99.9% produced by equal channel angular pressing was determined on cylindrical specimens with circumferential notches of different radii and compared with the notch sensitivity of conventional copper. Notch sensitivity of UFG copper is higher than that of its conventional counterpart. Electron back scattering diffraction technique showed that the UFG copper of purity 99.9% is not prone to grain coarsening during cycling. The grain structure within plastic zone around the cracks was found to differ substantially from that outside the plastic zone: the grains were markedly elongated, but their size was preserved. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：337 / 341
页数：5
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