航空材料学报2011，Vol.31Issue(5)：82-85,4.DOI:10.3969/j.issn.1005-5053.2011.5.016
TC11和TC4钛合金室温/400℃疲劳裂纹扩展特性研究
Investigation on Fatigue Crack Propagation Behavior of TC11 and TC4 Ti Alloys at Room Temperature and 400℃
摘要
Abstract
The fatigue crack propagation behaviors of two brands titanium alloys, TC11 and TC4, are studied. Fatigue crack propagation rate tests at room temperature and 400t were carried out. Results of the tests indicate that the experimental data at 400℃ seems more scatter than data at room temperature for both Ti alloys, especially for TC11. The reason of data scatter is discussed. Because of the high data scatter, the linear regression based on the average expectation is no longer suitable. Thus the prediction is non-conservative because of the large deviation of crack propagation rates on the high rate side. A new data fitting policy based on high propagation rale points is proposed. It is found that at room temperature and 400t , the crack propagation rate of TCI 1 is slower than TC4. Consequently TC11 is better than TC4 from the damage tolerance point of view.关键词
钛合金/疲劳/裂纹扩展速率/数据拟合Key words
titanium alloy/ fatigue/ crack propagation rate/ data fitting分类
矿业与冶金引用本文复制引用
黄新跃,张仕朝,鲁原,于慧臣..TC11和TC4钛合金室温/400℃疲劳裂纹扩展特性研究[J].航空材料学报,2011,31(5):82-85,4.
