| LY12铝合金早期性能退化下超声非线性系数测量和金相观察 |
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| 引用本文： | 吴斌,李佳锐,颜丙生,何存富.LY12铝合金早期性能退化下超声非线性系数测量和金相观察[J].北京工业大学学报,2012,38(1):22-27. |
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| 作者姓名： | 吴斌 李佳锐 颜丙生 何存富 |
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| 作者单位： | 北京工业大学机械工程与应用电子技术学院,北京,100124 |
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| 基金项目： | 国家自然科学基金资助项目，北京市教委科技计划重点资助项目 |
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| 摘 要： | 针对材料早期力学性能退化问题,通过试验研究了疲劳加载下LY12铝合金试件的超声非线性系数和微观结构特征变化.结果表明,早期性能退化情况下,超声非线性系数和微观形态随着疲劳程度发生变化.超声非线性测量和微结构观察相结合的方法对于材料早期力学性能退化的疲劳寿命评估具有潜在的应用前景.
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| 关 键 词： | 超声非线性 材料性能退化 疲劳 微观结构 位错 |
Ultrasonic Nonlinear Coefficient Measurement and Optical Observation of LY12 Aluminum Alloy at Early Degradation Stages |
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| WU Bin,LI Jia-rui,YAN Bing-sheng,HE Cun-fu.Ultrasonic Nonlinear Coefficient Measurement and Optical Observation of LY12 Aluminum Alloy at Early Degradation Stages[J].Journal of Beijing Polytechnic University,2012,38(1):22-27. |
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| Authors: | WU Bin LI Jia-rui YAN Bing-sheng HE Cun-fu |
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| Affiliation: | (College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | Considering mechanical properties of materials for early material degradation,the nonlinear ultrasonic characteristics and microstructure changes for fatigued LY12 aluminum alloy specimens are experimentally investigated.Results show that the degradation at early stages accompanies by the ultrasonic nonlinear coefficient changes and micro morphological variety.The method combined with ultrasonic nonlinear measurements and microstructure observation has a potential application prospect for fatigue life assessment of early degradation. |
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| Keywords: | ultrasonic nonlinear material degradation fatigue microstructure dislocation |
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