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Phase diagram of ferroelastic systems in the presence of disorder: Analytical model and experimental verification

机译:存在故障时铁弹性系统的相图:分析模型和实验验证

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摘要

There is little consensus on the nature of the glass state and its relationship to other strain states in ferroelastic materials which show the shape memory effect and superelasticity. We provide a thermodynamic interpretation of the known strain states, including precursory tweed and strain-glass phases, by mapping the problem onto a spin model and analytically obtaining the phase diagram using real-space renormalization group methods. We further predict a spontaneous transition from the glass state to the ordered martensite phase. We verify this prediction by mapping out the experimental phase diagram for the ternary ferroelastic alloy Ti_(50)(Pd_(50-x)Cr_x) and demonstrate the emergence of the spontaneous transition. Our work thus provides a consistent framework in which to understand the various experimental and theoretical studies on the glassy behavior associated with ferroelastic materials.
机译:对于表现出形状记忆效应和超弹性的铁弹性材料中玻璃态的性质及其与其他应变态的关系,人们几乎没有共识。我们通过将问题映射到自旋模型上并使用实空间重归一化组方法来分析获得相图,从而提供对已知应变状态的热力学解释,包括前体花呢和应变玻璃相。我们进一步预测了从玻璃态到有序马氏体相的自发转变。我们通过绘制三元铁弹性合金Ti_(50)(Pd_(50-x)Cr_x)的实验相图来验证该预测,并证明自发转变的出现。因此,我们的工作提供了一个一致的框架,在其中可以理解与铁弹性材料相关的玻璃态行为的各种实验和理论研究。

著录项

  • 来源
    《Physical review》 |2012年第18期|184103.1-184103.12|共12页
  • 作者单位

    Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA,Institut de Physique Theorique, CEA Saclay, 91191 Gif Sur Yvette, France,LPTENS, 24 rue Lhomond, 75231 Paris, France;

    Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi' an Jiaotong University, Xi' an 710049, China;

    Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi' an Jiaotong University, Xi' an 710049, China;

    Laboratoire de Physique des Plasmas, CNRS-Ecole Polytechnique, 91128 Palaiseau cedex, France;

    Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA,Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi' an Jiaotong University, Xi' an 710049, China;

    Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi' an Jiaotong University, Xi' an 710049, China,Ferroic Physics Group, National Institute for Materials Science, Tsukuba, 305-0047, Ibaraki, Japan;

    Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

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  • 正文语种 eng
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  • 关键词

    structural transitions in nanoscale materials; glasses; spin glasses and other random magnets; martensitic transformations;

    机译:纳米级材料的结构转变;眼镜;旋转眼镜和其他随机磁铁;马氏体转变;

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