期刊
SCRIPTA MATERIALIA
卷 65, 期 5, 页码 420-423出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.05.025
关键词
Titanium; Brittle case; Alpha case; Cracks; Oxygen
类别
资金
- US AFOSR [FA8650-09-D-5223, FA8650-10-D-5226]
- Air Force Office of Scientific Research (AFOSR) [09RX24COR]
A simple model was used to predict the tendency of an (alpha + beta) titanium alloy to crack under tension after exposure to air at temperature. The model was experimentally validated for minimum stress to crack and saturation crack spacing. A diffusion model for oxygen ingress as a function of time, temperature and oxygen partial pressure is outlined; together with the surface cracking model and empirical crack growth models, this enables the framework for a life prediction tool for arbitrary time-temperature-environment history. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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