Influence of fatigue damage on ultimate tensile stress of sintered iron

被引：0
|
作者：
Palma, ES
机构：
[1] Department of Mechanical Engineering, UFMG, Campus Pampulha, 31260-901 Belo Horizonte, MG, Av. Antônio Carlos
来源：
POWDER METALLURGY | 1997年 / 40卷 / 03期
关键词：
D O I：
10.1179/pom.1997.40.3.211
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Conventional powder metallurgical techniques have been employed to manufacture two levels of sintered porosities in technically pure iron. The porous iron specimens were cyclically loaded with a number of cycles n lower than their expected life N then quasistatically pulled to failure. The ultimate tensile stress (UTS) values of these damaged specimens have been compared with UTS values of virgin specimens. It has been shown that static resistance (UTS) decreases almost linearly with cumulative damage at repeated loading. The decrease in UTS is greater at higher porosity levels and when a tensile (positive) mean stress is used for the cyclic loading.
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页码：211 / 213
页数：3
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