期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 32, 期 6, 页码 872-878出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2009.04.004
关键词
UltraHigh-Cycle Fatigue (UHCF); Fatigue thresholds; Dislocation microstructure; Cyclic strain localization; Surface roughness; Fatigue crack initiation
In High-Cycle Fatigue (HCF) of materials like copper, the most common failure modes originate from cyclic strain localization in persistent slip bands (PSBs). The latter form only when the loading amplitudes exceed the PSB thresholds. In contrast to this well-known HCF behaviour, it is shown in the present study that fatigue damage (cyclic strain localization, surface roughening, stage I crack initiation) develops even at loading amplitudes well below the PSB threshold in copper subjected to UltraHigh-Cycle Fatigue (UHCF). These findings are attributed to the accumulation of very small cyclic slip irreversibilities over very large numbers of cycles (>10(10)). (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据