| 环境湿度对铸铝合金超声疲劳裂纹扩展速率的影响研究 |
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| 引用本文： | 李文凯,崔海涛,温卫东,苏旭明,C C Engler-Pinto Jr. 环境湿度对铸铝合金超声疲劳裂纹扩展速率的影响研究[J]. 中国机械工程, 2016, 27(17): 2396 |
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| 作者姓名： | 李文凯 崔海涛 温卫东 苏旭明 C C Engler-Pinto Jr |
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| 作者单位： | 1.南京航空航天大学江苏省航空动力系统重点实验室，南京，2100162.北美福特汽车研究与创新中心，迪尔伯恩，密歇根州，美国，48121 |
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| 摘 要： | 针对铸铝合金A356-T6开展了不同环境湿度下的超声疲劳裂纹扩展试验和实验室环境湿度下的常规疲劳裂纹扩展试验。由试验结果可知，超声疲劳在干空气环境中的疲劳裂纹扩展速率最低，而在蒸馏水环境中的疲劳裂纹扩展速率最高。常规疲劳在实验室环境中的疲劳裂纹扩展速率和超声疲劳在蒸馏水环境中的疲劳裂纹扩展速率几乎一致。针对Wei建立的环境湿度对铝合金材料疲劳裂纹扩展速率预测模型进行了修正，得到了铸铝合金A356-T6在任意环境湿度和试验频率下的疲劳裂纹扩展速率预测模型。
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| 关 键 词： | 铸铝合金 超声疲劳 裂纹扩展 环境湿度 |
Effects of Humidity on Ultrasonic Fatigue Crack Growth Rate of a Cast Aluminum Alloy |
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| Li Wenkai,Cui Haitao,Wen Weidong,Su Xuming,C C Engler-Pinto Jr. Effects of Humidity on Ultrasonic Fatigue Crack Growth Rate of a Cast Aluminum Alloy[J]. China Mechanical Engineering, 2016, 27(17): 2396 |
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| Authors: | Li Wenkai Cui Haitao Wen Weidong Su Xuming C C Engler-Pinto Jr |
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| Affiliation: | 1.Jiangsu Province Key Laboratory of Aerospace Power System, Nanjing University of Aeronautics and Astronautics, Nanjing,2100162. Research and Innovation Center, Dearborn, MI, American,48121 |
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| Abstract: | Several fatigue crack growth tests on a cast aluminum alloy (A356-T6) were performed herein under different frequencies and humidity levels. The experimented results show that ultrasonic fatigue in dry air and in distilled water have lowest and highest crack growth rate respectively. Conventional fatigue in lab air has almost same crack growth rate as ultrasonic fatigue in distilled water. Wei's fatigue crack growth rate prediction model was modified, which could be used to predict the fatigue crack growth rate for peak aged cast aluminum alloy under different frequencies and humidity levels. |
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| Keywords: | cast aluminum alloy ultrasonic fatigue crack growth environmental humidity |
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