Abstract

Based on the theory of diffuse martensitic transitions (DMT), the physical mechanism of the influence of dispersed precipitate nanoparticles on the appearance of such features of the deformation behavior of alloys with the shape memory effect (SME) as the stabilization of martensite at temperatures significantly higher than the A_s and A_f temperatures characteristic of an alloy in the absence of nanoparticles c-oherent with the matrix is analyzed. The reason for the stabilization of martensite is the internal elastic stress fields associated with the particles, which serve as sites for the heterogeneous nucleation of martensite. It has been shown theoretically that, with an increase in the volume concentration of nanoparticles, the recovery of shape memory deformation occupies an increasingly narrow temperature range and occurs at an ever higher temperature. After reaching a certain critical value of the particle concentration, the return of the deformation of SM loses its stability and becomes explosive.

中文翻译：

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马氏体在纳米析出物上的稳定化和爆炸性马氏体转变的动力学

摘要

基于弥散马氏体转变理论（DMT），分散的沉淀纳米颗粒影响合金的变形行为特征的外观的物理机制具有形状记忆效应（SME），诸如马氏体在温度下的稳定性高于A _s和A _f分析了在没有纳米颗粒与基质的情况下合金的温度特性。马氏体稳定的原因是与颗粒有关的内部弹性应力场，该场是马氏体异质形核的位点。从理论上已经表明，随着纳米颗粒体积浓度的增加，形状记忆变形的恢复占据越来越窄的温度范围并且发生在越来越高的温度下。在达到一定的颗粒浓度临界值后，SM变形的恢复便失去了稳定性并变得爆炸性。