| Al—Li合金在慢拉伸条件下的形变与断裂行为 |
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| 引用本文： | 张匀,王中光,刘玉林,赵洪恩,胡壮麒,原正兴.Al—Li合金在慢拉伸条件下的形变与断裂行为[J].金属学报,1993,29(10):40-45. |
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| 作者姓名： | 张匀 王中光 刘玉林 赵洪恩 胡壮麒 原正兴 |
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| 作者单位： | 中国科学院金属研究所
(张匀，王中光，刘玉林，赵洪恩，胡壮麒)，沈阳工业学院(原正兴) |
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| 摘 要： | 研究了Ａｌ－Ｌｉ合金在单向受力状态下的形变特征与断裂行为，测试了不同时效状态合金的慢拉伸裂纹扩展速率与应力强度因子的关系。结果表明，不同时效合金的范性形变机制、微观断裂模式和慢拉伸裂纹扩展阻力不同，它们视微观组织和晶界性态而异，应变局部化是低塑性的根源。
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| 关 键 词： | 铝锂合金 拉伸试验 断裂 形变 |
| 收稿时间： | 1993-10-18 |
| 修稿时间： | 1993-10-18 |
DEFORMATION AND FRACTURE BEHAVIOUR OF Al-Li ALLOY UNDER SLOW TENSILE RATE CONDITION |
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| ZHANG Yun,WANG Zhongguang,LIU Yulin,ZHAO Hongen,HU Zhuangqi,YUAN Zhengxing Institute of Metal Research,Academia Sinica,Shenyang Shenyang University of Technology.DEFORMATION AND FRACTURE BEHAVIOUR OF Al-Li ALLOY UNDER SLOW TENSILE RATE CONDITION[J].Acta Metallurgica Sinica,1993,29(10):40-45. |
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| Authors: | ZHANG Yun WANG Zhongguang LIU Yulin ZHAO Hongen HU Zhuangqi YUAN Zhengxing Institute of Metal Research Academia Sinica Shenyang Shenyang University of Technology |
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| Abstract: | The deformation and fracture behavior of an Al-Li alloy have been investi-
gated under slow tensile loading. The relatioship between stress intensity factor and crack
growth rate has been determined for various aging conditions of the alloy. Plastic
deformation mechanism, microfracture mode and crack growth resistance are different for
various aging temperatures due to various microstructures. It was indicated that the strain
localization was the reason for low plastisity and the strain localization closely related to the
state of grain boundaries. The relation between macroproperties and microdeformation char-
acteristics has also been determined. |
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| Keywords: | Al-Li alloy deformation fracture |
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