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| 锻造工艺对TC4-DT和TC21损伤容限型钛合金疲劳裂纹扩展速率的影响 | |
| 引用本文： | 王新南,朱知寿,童路,周宇,周晓虎,俞汉清.锻造工艺对TC4-DT和TC21损伤容限型钛合金疲劳裂纹扩展速率的影响[J].稀有金属快报,2008,27(7):12-16. |
| 作者姓名： | 王新南 朱知寿 童路 周宇 周晓虎 俞汉清 |
| 作者单位： | 1. 北京航空材料研究院,北京,100095 2. 天津大学,天津,300085 3. 红原航空锻铸工业公司,陕西,三原,713801 4. 西北工业大学,陕西,西安,710072 |
| 基金项目： | 国家预先研究计划资助项目 , 航空基础科学基金资助项目 |
| 摘 要： | 研究了不同锻造工艺（近β锻造、准β锻造、两相区锻造）对TC4-DT和TC21损伤容限型钛合金疲劳裂纹扩展速率的影响，对比分析了不同锻造工艺的微观组织和疲劳裂纹扩展路径的关系。研究结果表明，与两相区锻造和近β锻造相比，TC4-DT和TC21钛合金经准β锻造后的疲劳裂纹扩展速率最低。准β锻造的锻件疲劳裂纹扩展路径曲折程度大，断口表面粗糙度大，有效地降低了疲劳裂纹扩展速率。 |
| 关 键 词： | 损伤容限型钛合金 TC4-DT TC21 锻造工艺 疲劳裂纹扩展速率 |
The Influence of Forging Processing on Fatigue Crack Propagation Rate of Damage-Tolerant Titanium Alloy |
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| Affiliation: | Wang Xinnan, Zhu Zhishou, Tong Lu, Zhou Yu, Zhou Xiaohu, Yu Hanqing (1. Beijing Institute of Aeronautical Materials, Beijing 100095, China;2. Tianjin University, Tianjin 300085, China;3. Hongyuan Aviation Forging and Casting Industry Company, Sanyuan 713801, China;4. Northwestern Polytechnical University, Xi＇an 710072, China) |
| Abstract: | The influence of forging process （near-forging, quasi-forging and conventional＋ forging） on fatigue crack propagation rate of damage-tolerant titanium alloy TC4-DT and TC21 was studied. The microstructure and fatigue crack propagation path have been compared and analyzed. The results show that comparing with near-forging and conventional＋forging, quasi-forging process can lead to the lowest fatigue crack propagation rate. The greater zigzag degree of fatigue crack propagation path and roughness of fracture surface can effectively lead to low rate of fatigue crack propagation. |
| Keywords: | damage-tolerant titanium alloy TC4-DT forging processing TC21 fatigue crack propagation rate |
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