| ON THE TENSILE MECHANICAL PROPERTY OF Si-Mn TRIP STEELS AT HIGH STRAIN RATE |
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| 引用本文： | X.C. Wei,L. Li,R.Y. Fu and W. ShiSchool of Materials Science and Engineering,Shanghai University,Shanghai 200072,China Manuscript received 18 June 2001, in revised form 7 November 2001. ON THE TENSILE MECHANICAL PROPERTY OF Si-Mn TRIP STEELS AT HIGH STRAIN RATE[J]. 金属学报(英文版), 2002, 15(3): 285-294 |
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| 作者姓名： | X.C. Wei L. Li R.Y. Fu and W. ShiSchool of Materials Science and Engineering Shanghai University Shanghai 200072 China Manuscript received 18 June 2001 in revised form 7 November 2001 |
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| 基金项目： | the financial supports of Shanghai Development Foun-dation of Auto Industry and the National Natural Science Foundation of China (No. 50171038). |
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| 摘 要： | 二．互ntYO*llCtloliAs kn OWOWn,the beh yyiors of the strength and ductility of material under dynamic con－dltlon are obviously differs尬from those under static condition．几ensure the reft劝ility ofstructure under dynamic or impact loading It Is necessar
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| 收稿时间： | 2001-06-18 |
| 修稿时间： | 2001-11-07 |
ON THE TENSILE MECHANICAL PROPERTY OF Si-Mn TRIP STEELS AT HIGH STRAIN RATE |
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| X.C.Wei,L.Li,R.Y.Fu,W.Shi. ON THE TENSILE MECHANICAL PROPERTY OF Si-Mn TRIP STEELS AT HIGH STRAIN RATE[J]. Acta Metallurgica Sinica(English Letters), 2002, 15(3): 285-294 |
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| Authors: | X.C.Wei L.Li R.Y.Fu W.Shi |
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| Affiliation: | School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | Tensile mechanical properties of 1.6Si-1.58Mn-0.195C TRIP (transformation-induced plasticity) steels under high strain rate and effects of DP (dual-phase) treatments were studied and compared to the quasi-static tensile behavior. The results show that the increasing of strain rate leads to increasing in their strengths and decreasing in the uniform elongation remarkably. Because the stable retained austenite in TRIP steel can transform to martensite during tensile testing and the material exhibits excellent characteristic of transformation induced plasticity, the plastic deformation behavior is evidently improved and the combination of strength and elongation is superior to that of dual-phase steel, although its strength is smaller than that of DP steel. However, DP treated steel shown lower elongation under dynamic tension in spite of higher strength. A model was proposed to explain the excellent elongation rate of TRIP steel compared with DP steel on the basis of SEM analysis and the strength of the components in microstructure. |
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| Keywords: | automobile sheet steel TRIP steel high strain rate tensile impact |
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