Effect of mean stress on cyclic stress-strain response of copper single crystals

被引：0

作者：

Lukás, P ^{[1
]}

Kunz, L ^{[1
]}

Svoboda, M ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Phys Mat, Brno, Czech Republic

来源：

FATIGUE '99: PROCEEDINGS OF THE SEVENTH INTERNATIONAL FATIGUE CONGRESS, VOLS 1-4 | 1999年

关键词：

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Copper single crystals oriented for single slip were cyclically loaded under load control with a non-zero mean stress. Contrary to symmetrical strain controlled tests there is no plateau at the cyclic stress-strain plot and there are no persistent slip bands in the dislocation structure. The microcracks initiate - as in case of symmetrical cycling - at the surface coarse slip markings having a sharp notch-peak topography. This leads to the conclusion that the persistent slip bands do not always play the crucial role in the initiation of fatigue microcracks.

引用

页码：115 / 122

页数：8

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