| 马氏体预相变的临界驱动力及非线性特征 |
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| 引用本文： | 万见峰,王健农,陈锦松.马氏体预相变的临界驱动力及非线性特征[J].金属学报,2005,41(6):573-576. |
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| 作者姓名： | 万见峰 王健农 陈锦松 |
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| 作者单位： | 上海交通大学材料科学与工程学院,上海,200030;宝山钢铁股份有限公司炼钢厂,上海,201900 |
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| 基金项目： | 国家自然科学基金资助项目50301011 |
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| 摘 要： | 基于电子-声子相互作用计算了马氏体预相变的临界驱动力．计算结果表明，临界相变驱动力的大小和凝聚声子的能量处于同一数量级．充分考虑这种相互作用和声子软化，得到关于原子位相角的double sine-Gordon方程，以此分析预相变的非线性特征，并认为电子-声子耦合机制可作为预相变的形核机制．
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| 关 键 词： | 马氏体预相变 电子-声子相互作用 临界驱动力 非线性特征 |
| 文章编号： | 0412-1961(2005)06-0573-04 |
| 收稿时间： | 2004-09-01 |
| 修稿时间： | 2005-01-04 |
Critical Driving Force and Nonlinear Characteristics of Martensitic Pretransition |
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| WAN Jianfeng,Wang Jiannong,CHEN Jinsong.Critical Driving Force and Nonlinear Characteristics of Martensitic Pretransition[J].Acta Metallurgica Sinica,2005,41(6):573-576. |
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| Authors: | WAN Jianfeng Wang Jiannong CHEN Jinsong |
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| Affiliation: | School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | The critical driving force of martensitic pretransition has been calculated based on the Hamiltonian containing electron-phonon interaction. The calculated results shows that the values of the driving force is of the same level as that of the condensed phonon. Considered the electron-phonon interaction and the condensation of TA or LA phonon, the double sine-Gordon equation of atomic phase angle has been proposed to study the nonlinear characteristics of the pretransition and the electron- phonon coupling mechanism may be taken as its main mechanism. |
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| Keywords: | martensitic pretransition electron-phonon interaction critical driving force nonlinear characteristic |
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