Mechanisms of fatigue crack propagation in titanium alloys at elevated temperature: environmental influence

机译：钛合金在高温下疲劳裂纹扩展的机理：环境影响

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This paper deals with a study of fatigue crack propagation in a Titanium alloy type 646 forged at 950 deg C and treated to display a Widmanstatten microstructure.Tests were performed at 500 deg C under sinusoidal and well waveforms at various frequencies and in different environmental conditions including high vacuum,air,and argon with controlled partial pressure of water vapour.Closure correction was systemtically done.Enhanced propagation rates observed in moist environments as compared to high vacuum are associated to corrosion-fatigue and/or creep-fatigue mechanisms induced by water vapour.The respective roles of oxygen and water vapour are discussed.

机译：本文研究了在950℃锻造并经过处理以显示Widmanstatten显微组织的646型钛合金的疲劳裂纹扩展。在500℃下以正弦波和阱波形在各种频率和不同环境条件下进行了测试高真空，空气和氩气，水蒸气的分压得到控制。系统地进行了闭环校正。与高真空相比，在潮湿环境中观察到的增强的传播速率与水蒸气引起的腐蚀疲劳和/或蠕变疲劳机制有关。讨论了氧气和水蒸气的各自作用。

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《Proceeding of An International Conference the Importance of understanding the fundamentals of the fatigue Process in Counteracting Its Effects in Engineering Components and Structures,and to Reflect on the Contributions of K.J.Miller Sheffield/United》|1997年|p.521-529|共9页
会议地点 Sheffield(GB)
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S.Lesterlin; C.Sarrazin-Baudoux; J.Petit;
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正文语种 eng
中图分类一般工业技术;
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1. Influence of temperature and environment on fatigue crack propagation in two titanium alloys #beta#-Cez and Ti-6.2.4.6 [J] . Lesterlin S., Petit J. Revue de Metallurgie: Cahiers d'Informations Techniques . 1996,第9期

机译：温度和环境对两种钛合金＃beta＃-Cez和Ti-6.2.4.6疲劳裂纹扩展的影响
2. Fatigue crack propagation in an Fe_3Al based alloy tested at elevated temperatures [J] . Petr Hausild, Miroslav Karlik, Ivan Nedbal Kovove materialy . 2004,第3期

机译：在高温下测试的Fe_3Al基合金中的疲劳裂纹扩展
3. The mechanisms of long fatigue crack growth behaviour in Al-Si casting alloys at room and elevated temperature [J] . Moffat A.J., Mellor B.G., Sinclair I., Materials Science and Technology . 2007,第12期

机译：室温和高温下Al-Si铸造合金的长疲劳裂纹扩展行为机理
4. Mechanisms of fatigue crack propagation in titanium alloys at elevated temperature: environmental influence [C] . S. Lesterlin, C. Sarrazin-Baudoux, J. Petit International conference on the importance of understanding the fundamentals of the fatigue process in counteracting its effects in engineering components and structures . 1999

机译：高温钛合金疲劳裂纹繁殖机理：环境影响
5. Investigation of Fatigue and Creep-fatigue Crack Growth in Alloy 709 at Elevated Temperatures [D] . Shaber, Nicholas L. 2018

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机译：铝合金腐蚀疲劳裂纹扩展。第一部分循环应力波形对al-Zn-mg合金腐蚀疲劳裂纹扩展的影响。第二部分。 al-Zn-mg合金腐蚀疲劳裂纹扩展机理

Mechanisms of fatigue crack propagation in titanium alloys at elevated temperature: environmental influence

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