期刊
SCRIPTA MATERIALIA
卷 61, 期 12, 页码 1105-1108出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2009.08.036
关键词
Nickel alloys; Fatigue; Scanning electron microscopy (SEM); Microstructure
类别
资金
- National Natural Science Foundation of China [50971078]
Thermomechanical fatigue (TMF) testing was conducted on single-crystal nickel-base superalloys. Distinct cracking behaviors were found to occur under different cycling conditions. A crack generally initiates from the specimen surface. For the TMF cycling without a compressive hold time, the crack initially grows perpendicular to the stress axis and then propagates along a twin plate. For the TMF cycling with a compressive hold time, the main crack propagates directly along a twin plate until final failure. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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