| 金属材料拉伸的高应变率增塑现象及分析 |
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| 引用本文： | 唐长国,朱金华,周惠久.金属材料拉伸的高应变率增塑现象及分析[J].材料研究学报,1996,10(1):19-24. |
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| 作者姓名： | 唐长国 朱金华 周惠久 |
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| 作者单位： | 西北工业大学,西安交通大学 |
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| 摘 要： | 用动态拉伸法研究了三种金属材料塑性随应变率的变化而变化的情况,应变率范围为１０＾－４￣１０＾３ｓ＾－１研究发现,随着应变率的升高,三种金属的塑性都有不同程度的提高。其中３０ＣｒＭｎＳｉＮｉ２Ａ淬火态在０．５ｍｍ·ｍｉｎ＾－１加载速率时延伸率仅为７０％,而在４０ｍ·ｓ＾－１时为１４．５％,提高了一倍多,表现出典型的高应变率增塑现象,微观实验及分析表明,高应变率增塑现象的机理和高应变率导致的温度升高,
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| 关 键 词： | 高应变率 塑性 金属材料 拉伸 增塑现象 |
| 收稿时间： | 1996-02-25 |
| 修稿时间： | 1996-02-25 |
A PHENOMENON AND ANALYSIS OF PLASTISITY-INCREASING INDUCED BY HIGH STRAIN RATE FOR SOME METALLIC MATERIALS |
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| TANG ChangguoZHU Jinhua,ZHOU Huijiu.A PHENOMENON AND ANALYSIS OF PLASTISITY-INCREASING INDUCED BY HIGH STRAIN RATE FOR SOME METALLIC MATERIALS[J].Chinese Journal of Materials Research,1996,10(1):19-24. |
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| Authors: | TANG ChangguoZHU Jinhua ZHOU Huijiu |
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| Affiliation: | TANG Changguo(Northweatern Poly Technical Universily)ZHU Jinhua; ZHOU Huijiu (Xi'an Jiaotong University) |
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| Abstract: | Dynamic tension tests were employed to study the effect of strain rate on plastisity for three metallic materials, strain rate ranges from 10-4 to 103 s-1. A phenomenon of plastisity-increasing induced by high strain rate is found for tested materials, which is associated with "adiabatic heating" of specimens,deformation twinning, formation and suppression of phase transformation induced by strain. |
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| Keywords: | plastisity strain rate phase transformation twinning |
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