| 钛合金保载疲劳失效特征及敏感性判定方法 |
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| 引用本文： | 邱建科,席国强,马英杰,吉海宾,雷家峰,黄爱军,Rugg Davi,杨锐. 钛合金保载疲劳失效特征及敏感性判定方法[J]. 稀有金属材料与工程, 2017, 46(S1): 124-128 |
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| 作者姓名： | 邱建科 席国强 马英杰 吉海宾 雷家峰 黄爱军 Rugg Davi 杨锐 |
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| 作者单位： | 中国科学院金属研究所,中国科学院金属研究所,中国科学院金属研究所,中国科学院金属研究所,中国科学院金属研究所,,Rolls-Royce plc,Derby DE BJ,UK,中国科学院金属研究所 |
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| 基金项目： | 国家自然科学基金资助(项目号51171195、51401221) |
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| 摘 要： | 钛合金在航空发动机上使用时存在保载疲劳失效现象。钛合金保载疲劳寿命显著低于普通疲劳寿命且其断裂特征有别于普通疲劳。本文通过系统的实验研究,从疲劳断口、二次裂纹以及应变积累等方面总结了保载疲劳的失效特征。研究对象涵盖了保载敏感性强、弱以及无的钛合金类型。利用上述总结的特征,给出了判定钛合金保载疲劳失效及敏感性强弱的方法,该方法可为保载疲劳实验研究和工程失效分析提供指导。
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| 关 键 词： | 钛合金 保载疲劳 保载敏感性 断裂特征 失效分析 |
| 收稿时间： | 2016-05-12 |
| 修稿时间： | 2016-05-12 |
Characteristics of dwell fatigue failure and methodology for assessing dwell sensitivity in titanium alloys |
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| Jianke Qiu,Guoqiang Xi,Yingjie M,Haibin Ji,Jiafeng Lei,Aijun Huang,David Rugg and Rui Yang. Characteristics of dwell fatigue failure and methodology for assessing dwell sensitivity in titanium alloys[J]. Rare Metal Materials and Engineering, 2017, 46(S1): 124-128 |
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| Authors: | Jianke Qiu Guoqiang Xi Yingjie M Haibin Ji Jiafeng Lei Aijun Huang David Rugg Rui Yang |
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| Affiliation: | Institute of Metal Research,Chinese Academy of Sciences,Institute of Metal Research,Chinese Academy of Sciences,Institute of Metal Research,Chinese Academy of Sciences,Institute of Metal Research,Chinese Academy of Sciences,Institute of Metal Research,Chinese Academy of Sciences,,Rolls-Royce plc,Derby DE BJ,UK,Institute of Metal Research,Chinese Academy of Sciences |
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| Abstract: | Titanium alloys have a dwell fatigue failure mode during service in the aircraft engine, which is manifested by a significant reduction in fatigue life when comparing with normal continuous cycling. In contrast to normal fatigue, dwell fatigue has distinct failure characteristics. Through a systematic experimental research, this paper summarized the characteristics of dwell fatigue failure from three aspects, including the fatigue fracture, secondary crack and strain accumulation. The research objects covered from highly susceptible to unsusceptible titanium alloys. According to the summarized failure characteristics, a methodology for identifying the dwell fatigue failure and assessing the dwell sensitivity has been given, which could provide guidance for the experimental research and engineering failure investigation. |
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| Keywords: | Titanium alloy dwell fatigue dwell sensitivity fracture characteristic failure investigation |
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