| 8090Al—Li合金疲劳短裂纹门槛值的研究 |
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| 引用本文： | 陈铮.8090Al—Li合金疲劳短裂纹门槛值的研究[J].金属学报,1990,26(5):62-65. |
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| 作者姓名： | 陈铮 |
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| 作者单位： | 西北工业大学401室 讲师 |
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| 摘 要： | 本文研究了8090Al-Li合金穿透疲劳短裂纹的门槛值,测定了不同长度短裂纹的门槛值和裂纹闭合效应,探讨了该合金疲劳短裂纹门槛值、裂纹尾迹和裂尖屏蔽之间的关系,给出了该合金穿透疲劳短裂纹的上界值和理论最低门槛值。
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| 关 键 词： | Al－Li合金 疲劳 裂纹 门槛值 |
| 收稿时间： | 1990-05-18 |
| 修稿时间： | 1990-05-18 |
THRESHOLD OF SHORT FATIGUE CRACK FOR 8090 Al-Li ALLOY |
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| CHEN Zheng Northwestern Polytechnical University,Xi''''an.THRESHOLD OF SHORT FATIGUE CRACK FOR 8090 Al-Li ALLOY[J].Acta Metallurgica Sinica,1990,26(5):62-65. |
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| Authors: | CHEN Zheng Northwestern Polytechnical University Xi'an |
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| Abstract: | Threshold of short through fatigue crack for an Al-Li 8090 alloy wasevaluated to be lower than that of long crack, and to decrease with the shorteningof the crack length. The correlation among the threshold, crack wake and crack tipshielding of the short fatigue crack was discussed. The critical length and lowesttheoretical threshold of short through fatigue crack were presented. |
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| Keywords: | Al-Li alloy short fatigue crack threshold crack closure effect crack tip shielding crack wake |
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