| 电子束焊接Ti-6Al-4V合金的准静态和动态拉伸行为 |
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| 引用本文： | 张静,谭成文,任宇,王富耻,才鸿年.电子束焊接Ti-6Al-4V合金的准静态和动态拉伸行为[J].中国有色金属学会会刊,2011,21(1):39-44. |
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| 作者姓名： | 张静 谭成文 任宇 王富耻 才鸿年 |
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| 作者单位： | 张静,任宇,王富耻,才鸿年,ZHANG Jing,REN Yu,WANG Fu-chi,CAI Hong-nian(北京理工大学,材料学院,北京,100081);谭成文,TAN Cheng-wen(北京理工大学,材料学院,北京,100081;北京航天医学工程研究所,先进材料行为特性实验室,北京,100081) |
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| 摘 要： | 利用传统拉伸试验机和霍普金森（Hopkinson）拉杆实验装置研究电子束焊接的Ti-6Al-4V合金在应变率为10-3和103s-1时的准静态和动态拉伸行为,利用光学显微镜和扫描电子显微镜观察基体材料和焊缝材料的微观组织,研究基体材料和焊接材料在拉伸实验后的断裂特征。结果表明：在应变率分别为10-3和103s-1的条件下,焊缝材料的强度明显高于基体材料,焊缝材料的伸长率低于基体材料。同时,焊缝材料和基体材料均为应变率敏感材料;当应变率从10-3上升到103s-1时,焊缝材料的伸长率明显提高,而基体材料的伸长率基本没有变化;焊缝材料的断裂模式由脆性断裂转向韧性断裂,造成从准静态加载条件到动态加载条件下焊缝材料伸长率的提高。
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| 关 键 词： | Ti-6Al-4V合金 电子束焊接 准静态拉伸行为 动态行为 断裂模式 |
Quasi-static and dynamic tensile behaviors in electron beam welded Ti-6Al-4V alloy |
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| ZHANG Jing,TAN Cheng-wen,REN Yu,WANG Fu-chi,CAI Hong-nian.Quasi-static and dynamic tensile behaviors in electron beam welded Ti-6Al-4V alloy[J].Transactions of Nonferrous Metals Society of China,2011,21(1):39-44. |
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| Authors: | ZHANG Jing TAN Cheng-wen REN Yu WANG Fu-chi CAI Hong-nian |
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| Affiliation: | ZHANG Jing1,TAN Cheng-wen1,2,REN Yu1,WANG Fu-chi1,CAI Hong-nian1 1.School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China,2.Laboratory of Advanced Materials Behavior Characteristics,Beijing Institute of Technology and Institute of Sp ace Medico-Engineering |
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| Abstract: | The quasi-static and dynamic tensile behaviors in electron beam welded(EBW) Ti-6Al-4V alloy were investigated at strain rates of 10-3 and 103 s-1,respectively,by materials test system(MTS) and reconstructive Hopkinson bars apparatus.The microstructures of the base metal(BM) and the welded metal(WM) were observed with optical microscope.The fracture characteristics of the BM and WM were characterized with scanning electronic microscope.In Ti-6Al-4V alloy joint,the flow stress of WM is higher than that of BM,... |
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| Keywords: | Ti-6Al-4V alloy electron beam welding quasi-static tensile behavior dynamic behavior fracture mode |
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