| 马氏体相变形核机制的研究 |
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| 引用本文： | 刘宗昌,计云萍,任慧平.马氏体相变形核机制的研究[J].科技成果管理与研究,2011(2):48-51,56. |
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| 作者姓名： | 刘宗昌 计云萍 任慧平 |
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| 作者单位： | 内蒙古科技大学材料与冶金学院,内蒙古,包头,014010 |
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| 摘 要： | 应用JEM-2100电镜、QUANTA-400环扫电镜对钢中马氏体相变的形核进行了观察，发现马氏体不仅可在奥氏体晶内形核，而且可在晶界、相界面等处形核。认为马氏体是在缺陷处依靠结构涨落、能量涨落形核，是晶格重构的过程，不是切变过程。研究计算了马氏体晶核的临界尺寸和形核功。
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| 关 键 词： | 过冷奥氏体 马氏体 界面 形核功 临界晶核 切变 |
Study on Nucleation Mechanism of Martensitic Transformation |
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| LIU Zong-chang,JI Yun-ping,REN Hui-ping.Study on Nucleation Mechanism of Martensitic Transformation[J].Management and Research on Scientific & Technological Achievements,2011(2):48-51,56. |
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| Authors: | LIU Zong-chang JI Yun-ping REN Hui-ping |
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| Institution: | (Material and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou, 014010, China) |
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| Abstract: | The nucleation of martensitic transformation in steel was observed by JEM-2100 transmission electron microscope and QUANTA-400 environmental scanning electron microscope. The results showed that martensite nucleates were not only in austenite crystal grain but also at austenite crystal grain boundary and phase interface. It is considered that the nucleation of martensite was not shear transformation, but a crystal lattice reconstruction process at the defects depending on structure fluctuation and energy fluctuation. At the same time, the critical dimension and the nucleation energy of martensite crystal nucleus were calculated. |
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| Keywords: | super-cooled austenite martensite interface nucleation energy critical nucleus shear transformation |
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