期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 31, 期 5, 页码 989-994出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2008.03.036
关键词
Titanium alloys; Crack growth; Faceted growth; Overloads
资金
- Office of Naval Research [N00014-06-1-0089]
- Federal Aviation Administration (FAA) [GRT869261]
This communication describes the results of spectrum fatigue loading experiments conducted on cast and hot isostatically pressed Ti-6Al-4V. The purpose of the experiments is to elucidate the nature of faceted crack growth that occurs at low values of Delta K in titanium alloys during cyclic loading. The results clearly show that multiple load cycles are required for the crack to traverse one grain and produce a single facet. The confusing terminology related to low Delta K fatigue fracture topography is reviewed and the term low Delta K faceted growth is proposed as a preferred descriptor. (C) 2008 Elsevier Ltd. All rights reserved.
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