高压扭转下的扩散相变和驱替相变

IF 1.1 Q3 METALLURGY & METALLURGICAL ENGINEERING

Acta Metallurgica Slovaca Pub Date : 2019-12-18 DOI:10.12776/ams.v25i4.1368

B. Straumal, A. Kilmametov, A. Mazilkin, Olga Kogtenkova Kogtenkova, B. Baretzky, A. Korneva, P. Ziȩba

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引用次数: 4

摘要

严重的塑性变形（SPD）会引起各种相变。在一定应变后，外力产生的缺陷与其弛豫（湮灭）之间建立了动态平衡。该稳态下的晶粒尺寸、硬度、相组成等不取决于材料的初始状态，因此是等最终的。在这篇综述中，我们讨论了沉淀物的沉淀和溶解之间的竞争、非晶化和（纳米）结晶、SPD诱导的加速传质、同素异形体和马氏体转变以及晶界相的形成。

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DIFFUSIVE AND DISPLACIVE PHASE TRANSFORMATIONS UNDER HIGH PRESSURE TORSION

Severe plastic deformation (SPD) can induce various phase transformations. After a certain strain, the dynamic equilibrium establishes between defects production by an external force and their relaxation (annihilation). The grain size, hardness, phase composition etc. in this steady-state does not depend on the initial state of a material and is, therefore, equifinal. In this review we discuss the competition between precipitation and dissolution of precipitates, amorphization and (nano)crystallization, SPD-induced accelerated mass-transfer, allotropic and martensitic transitions and formation of grain boundary phases.

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来源期刊

Acta Metallurgica Slovaca METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

2.00

自引率

30.00%

发文量

审稿时长

12 weeks