期刊
SCRIPTA MATERIALIA
卷 60, 期 7, 页码 500-503出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.11.032
关键词
High-cycle fatigue; Microstructure; Subsize fatigue sample; Small crack propagation; 7075-T6
类别
资金
- AFOSR [FA9550-080C-0027]
The effect of grain refinement on the fatigue life of 7075Al alloy was evaluated using a subsize fatigue specimen. High-cycle fatigue of fine-grained 7075Al showed substantial improvement over the parent 7075-T6 material. This improvement in fatigue life is ascribed to retardation of crack propagation caused by grain boundaries acting as barriers and a crack closure effect due to crack deflection. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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