| Mg-8%Li合金动态断裂行为的加载速率效应 |
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| 引用本文： | 沙桂英,于涛,王洪顺,王赫男,孙晓光. Mg-8%Li合金动态断裂行为的加载速率效应[J]. 兵工学报, 2011, 32(1): 58-62 |
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| 作者姓名： | 沙桂英 于涛 王洪顺 王赫男 孙晓光 |
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| 作者单位： | （沈阳航空航天大学 材料科学与工程学院， 辽宁 沈阳 110136） |
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| 摘 要： | 利用Hopkinson压杆技术对Mg-8%Li合金进行动态断裂实验，研究该合金在高速冲击下的动态断裂行为及其加载速率效应。结果表明：在高速冲击条件下，Mg-8%Li合金呈现韧性断裂，断口中存在大量韧窝。随冲击速度由14.27 m/s增加到21.33 m/s，Mg-8%Li合金的动态断裂韧性降低，断口中二次裂纹明显增多，从而使Mg-8%Li合金在高加载速率下表现出脆性断裂倾向。
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| 关 键 词： | 金属材料 Mg-8%Li合金 加载速率 动态断裂行为 断裂韧性 |
Effect of Loading Rate on Dynamic Fracture Behavior of Mg-8%Li Alloy |
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| SHA Gui-ying,YU Tao,WANG Hong-shun,WANG He-nan,SUN Xiao-guang. Effect of Loading Rate on Dynamic Fracture Behavior of Mg-8%Li Alloy[J]. Acta Armamentarii, 2011, 32(1): 58-62 |
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| Authors: | SHA Gui-ying YU Tao WANG Hong-shun WANG He-nan SUN Xiao-guang |
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| Affiliation: | (School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136，Liaoning，China) |
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| Abstract: | The dynamic fracture experiments of Mg-8%Li alloy were carried out with the Hopkinson pressure bar,and the dynamic fracture behavior and its loading rate effects of the alloy under high-speed impact were investigated.The results show that the fracture micro-mechanism of Mg-8%Li alloy is ductile fracture under high-speed impact condition,and there are a lot of dimples in the fracture surface.With the increase of loading rate from 14.27 m/s to 21.33 m/s,the dynamic fracture toughness of the alloy reduces grad... |
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| Keywords: | metallic material Mg-8%Li alloy loading rate dynamic fracture behavior fracture toughness |
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