Residual strain distribution around a fatigue-crack tip determined by neutron diffraction

E-Wen Huang*, Kuan Wei Li, Soo Yeol Lee, Wanchuck Woo, Yi Shiun Ding, Leu Wen Tsay, Chung Hao Chen

*此作品的通信作者

研究成果: Conference contribution同行評審

1 引文 斯高帕斯(Scopus)

摘要

An analysis of residual stress, one of the contributory factors to the crack tip driving force, is extremely important to probe the fatigue crack growth mechanism and to further develop the life prediction methodology. Since fatigue crack growth is governed by crack-tip plasticity and crack closure in the wake of the crack tip, the investigation of residual stain/stress field in both behind and in front of the crack tip is crucial. In the current work, a 304L stainless steel compact-tension specimen is pre-cracked under constant-amplitude cyclic loading. Neutron diffraction is employed to directly measure the three orthogonal residual strain fields with 1-mm spatial resolution as a function of distance from the crack tip. The mapping results show that the three orthogonal residual-strain distributions around the crack tip depend on the stress multiaxiality, not following a single Poisson relationship to each axis.

原文English
主出版物標題THERMEC 2011
頁面1685-1689
頁數5
DOIs
出版狀態Published - 30 一月 2012
事件7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC, Canada
持續時間: 1 八月 20115 八月 2011

出版系列

名字Materials Science Forum
706-709
ISSN(列印)0255-5476

Conference

Conference7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
國家/地區Canada
城市Quebec City, QC
期間1/08/115/08/11

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