| Zr基大块非晶合金在过冷液相区内的本构关系的研究 |
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| 引用本文： | 唐娜,王新云,汤莹莹,郑志镇,李建军. Zr基大块非晶合金在过冷液相区内的本构关系的研究[J]. 中国科学:物理学 力学 天文学, 2010, 40(3): 303-310 |
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| 作者姓名： | 唐娜 王新云 汤莹莹 郑志镇 李建军 |
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| 作者单位： | 华中科技大学材料成形与模具技术国家重点实验室, 武汉 430074 |
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| 基金项目： | 国家自然科学基金重点项目(批准号: 50635020)和教育部技术研究重点项目(编号: 107075)资助 |
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| 摘 要： | 在Zwick/Roell力学性能试验机上进行Zr55Cu30Al10Ni5大块非晶合金在过冷液相区的压缩试验, 根据应力-应变曲线的过冲现象, 提出了Maxwell-Pulse本构模型, 该模型由蠕变函数耦合脉冲函数得到. 通过对虚应力模型和脉冲指数模型的拟合, 得到了Maxwell-Pulse本构方程的各项参数. 对比试验及拟合所得的数据及曲线, 两者的真实应力-应变曲线吻合较好, 且能反映出应力过冲现象. 又通过数值模拟和杯形零件成形试验验证了该本构方程适于描述Zr55Cu30Al10Ni5大块非晶合金在过冷液相区的力学行为.
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| 关 键 词： | 大块非晶合金 过冷液相区 本构方程 应力过冲 微反挤压 |
| 收稿时间： | 2009-12-09 |
| 修稿时间： | 2009-12-25 |
Study on constitutive equation of Zr-based bulk metallic glasses in the supercooled liquid region |
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| TANG Na,WANG XinYun,TANG YingYing,ZHENG ZhiZhen , LI JianJun State Key Laboratory of Material Processing , Die Mould Technology,Huazhong University of Science , Technology,Wuhan ,China. Study on constitutive equation of Zr-based bulk metallic glasses in the supercooled liquid region[J]. SCIENCE CHINA Physics, Mechanics & Astronomy, 2010, 40(3): 303-310 |
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| Authors: | TANG Na WANG XinYun TANG YingYing ZHENG ZhiZhen & LI JianJun State Key Laboratory of Material Processing Die Mould Technology Huazhong University of Science Technology Wuhan China |
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| Affiliation: | TANG Na,WANG XinYun,TANG YingYing,ZHENG ZhiZhen & LI JianJun State Key Laboratory of Material Processing , Die Mould Technology,Huazhong University of Science , Technology,Wuhan 430074,China |
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| Abstract: | Compression experiments of Zr55Cu30Al10Ni5 BMG were conducted in SLR (super liquid region) with Zwick/Roell mechanical testing machine. According to the overshoot phenomenon in stress-strain curves,a Maxwell-Pulse constitutive model was constructed,which combines visco-elastic Maxwell model and pulse function. The parameters of Maxwell-Pulse constitutive model was obtained by fitting fictive stress model and pulse function. Compared the data of experiments with that of fitted constitutive model,they show go... |
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| Keywords: | bulk metallic glasses supercooled liquid region constitutive equation stress overshoot micro-backward extrusion PACS:81.05.K8 83.10.Gr 62.10.Ts |
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