| Effect of Nb on the transformation kinetics of low carbon （manganese） steel during deformation of undercooled austenite |
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| 引用本文： | Guoan Chen Wangyue Yang Shouzhen Guo Zuqing Sun. Effect of Nb on the transformation kinetics of low carbon （manganese） steel during deformation of undercooled austenite[J]. 北京科技大学学报(英文版), 2006, 13(5): 411-415. DOI: 10.1016/S1005-8850(06)60083-2 |
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| 作者姓名： | Guoan Chen Wangyue Yang Shouzhen Guo Zuqing Sun |
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| 作者单位： | [1]Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China [2]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | The hot compression tests using Gleeble 1500 were performed by varying the true strain up to 1.6 （80% reduction） in Nbfree and Nb-microalloyed steels. The effect of Nb addition on the transformation kinetics during deformation of undercooled austenite was investigated. It was found that as compared with Nb-free steel, the transformation incubation period of Nb-bearing steel was prolonged and the transformation kinetics curves parallelly moved to higher strain because of the solute Nb drag effect. Studies on kinetics also showed that the deformation-enhanced ferrite transformation （DEFT） of the two steels were composed of three stages, which can be expressed by the J-M-A equations individually. However, the parameter n related to the mode of nucleation and growth is somewhat different in the first and second stages of the two steels, and the same in the third stage for both the steels corresponding to the nucleation Of retained austenite.
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| 关 键 词： | 铌微合金化钢 铁氧体转变 形变强化 动力学 J-M-A平衡 |
| 收稿时间： | 2005-04-19 |
Effect of Nb on the transformation kinetics of low carbon (manganese) steel during deformation of undercooled austenite |
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| Guoan Chen,Wangyue Yang,Shouzhen Guo,Zuqing Sun. Effect of Nb on the transformation kinetics of low carbon (manganese) steel during deformation of undercooled austenite[J]. Journal of University of Science and Technology Beijing, 2006, 13(5): 411-415. DOI: 10.1016/S1005-8850(06)60083-2 |
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| Authors: | Guoan Chen Wangyue Yang Shouzhen Guo Zuqing Sun |
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| Affiliation: | 1. Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The hot compression tests using Gleeble 1500 were performed by varying the true strain up to 1.6 (80% reduction) in Nbfree and Nb-microalloyed steels. The effect of Nb addition on the transformation kinetics during deformation of undercooled austenite was investigated. It was found that as compared with Nb-free steel, the transformation incubation period of Nb-bearing steel was prolonged and the transformation kinetics curves parallelly moved to higher strain because of the solute Nb drag effect. Studies on kinetics also showed that the deformation-enhanced ferrite transformation (DEFT) of the two steels were composed of three stages, which can be expressed by the J-M-A equations individually. However, the parameter n related to the mode of nucleation and growth is somewhat different in the first and second stages of the two steels, and the same in the third stage for both the steels corresponding to the nucleation of retained austenite. |
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| Keywords: | Nb-microalloyed steel deformation-enhanced ferrite transformation transformation kinetics J-M-A equations |
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