| 钢在疲劳过程中的超声衰减 |
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| 引用本文： | 潘正良,王双全,李广义.钢在疲劳过程中的超声衰减[J].物理学报,1985,34(1):134-139. |
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| 作者姓名： | 潘正良 王双全 李广义 |
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| 作者单位： | 中国科学院金属研究所 |
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| 摘 要： | 测量了高强度钢的紧凑拉伸试样在疲劳过程中的10MHz超声衰减,研究了疲劳裂纹前端区域内的位错动态行为。
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| 收稿时间： | 1/4/1984 12:00:00 AM |
ULTRASONIC ATTENUATION IN STEEL DURING FATIGUE |
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| PAN ZHENG-LIANG,WANG SHUANG-QUAN and LI GUANG-YI.ULTRASONIC ATTENUATION IN STEEL DURING FATIGUE[J].Acta Physica Sinica,1985,34(1):134-139. |
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| Authors: | PAN ZHENG-LIANG WANG SHUANG-QUAN and LI GUANG-YI |
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| Abstract: | The fatigue crack length a and the changes of ultrasonic attenuation △α at frequency 10 MHz 011 compact test sample of 30CrMnSiNi2A steel have been simutane-uosly measured as a function of fatigue cycle number N. It was shown that the △α(N) curve was in good response to the a(N) curve and the △α was traced out during the period of crack nucleation. The ultrasonic attenuation a as a function of load P in pulsating tension fatigue test has been investigated. When Pc, where Pc is a critical load, a decreases wth increase of the load; when P>Pc, a increases rapidly with increase of the load. A depinning model of dislocations is suggested. The ultrasonic attenuation is a very useful tool for studying the growth of fatigue crack. |
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