| Ti-6Al-4V合金中的绝热剪切断裂 |
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| 引用本文： | 张静,谭成文,任宇,于晓东,马红磊,王富耻,才鸿年. Ti-6Al-4V合金中的绝热剪切断裂[J]. 中国有色金属学会会刊, 2011, 21(11): 2396-2401. DOI: 10.1016/S1003-6326(11)61026-1 |
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| 作者姓名： | 张静 谭成文 任宇 于晓东 马红磊 王富耻 才鸿年 |
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| 作者单位： | 北京理工大学材料学院;中国航天员科研与训练中心先进材料行为特性实验室; |
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| 摘 要： | 利用分离式霍普金森压杆（SHPB）装置在3900s-1应变率条件下对Ti-6Al-4V合金进行动态加载,获得完全分离的断裂试样。使用扫描电子显微镜对试样的断裂特征进行观察。结果表明：试样中出现绝热剪切断裂,试样断口上交替分布着两个不同特征的典型区域（韧窝区及平滑区）。其中,韧窝区由微孔洞形核、长大并最终连接形成,表现出韧性断裂特征。在平滑区观察到超细晶粒（UFGs）,且晶粒间可观察到微裂纹,说明平滑区由微裂纹沿晶界扩展形成,表现出脆性断裂特征。由此可知,Ti-6Al-4V合金在动态加载过程中沿绝热剪切带发生的断裂失效过程不均匀,韧性及脆性两种断裂模式的共同作用导致该合金样品的最终断裂。
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| 关 键 词： | Ti-6Al-4V合金 绝热剪切带 动态断裂模式 |
| 收稿时间： | 2010-10-29 |
Adiabatic shear fracture in Ti-6Al-4V alloy |
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| ZHANG Jing,TAN Cheng-wen,,REN Yu,YU Xiao-dong,MA Hong-lei,WANG Fu-chi,CAI Hong-nian .School of Material Science , Engineering,Beijing Institute of Technology,Beijing ,China,.Laboratory of Advanced Materials Behavior Characteristics,China Astronaut Research , Training Center. Adiabatic shear fracture in Ti-6Al-4V alloy[J]. Transactions of Nonferrous Metals Society of China, 2011, 21(11): 2396-2401. DOI: 10.1016/S1003-6326(11)61026-1 |
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| Authors: | ZHANG Jing TAN Cheng-wen REN Yu YU Xiao-dong MA Hong-lei WANG Fu-chi CAI Hong-nian .School of Material Science Engineering Beijing Institute of Technology Beijing China .Laboratory of Advanced Materials Behavior Characteristics China Astronaut Research Training Center |
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| Affiliation: | ZHANG Jing1,TAN Cheng-wen1,2,REN Yu1,YU Xiao-dong1,MA Hong-lei2,WANG Fu-chi1,CAI Hong-nian1 1.School of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China,2.Laboratory of Advanced Materials Behavior Characteristics,China Astronaut Research and Training Center |
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| Abstract: | Separated specimens of Ti-6Al-4V alloy were dynamically loaded at a strain rate of 3 900 s-1 using a split Hopkinson pressure bar(SHPB) apparatus.The fracture features of the separated specimens were investigated by a scanning electron microscope.The results show that adiabatic shear failure occurs in the tested specimens,and two typical areas(dimple and smooth areas) with different features are alternatively distributed on the whole fracture surface.The dimple areas originate from voids generation and coal... |
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| Keywords: | Ti-6Al-4V adiabatic shear dynamic fracture mode |
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