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 d...

Full description

Saved in:
Bibliographic Details
Published inActa Metallurgica Slovaca (Online) Vol. 25; no. 4; pp. 230 - 252
Main Authors Straumal, Boris, Kilmametov, Askar, Mazilkin, Andrey Mazilkin, Kogtenkova, Olga Kogtenkova, Baretzky, Brigitte, Korneva, Anna, Zięba, Pawel
Format Journal Article
LanguageEnglish
Published 01.01.2019
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:1335-1532
1338-1156
DOI:10.12776/ams.v25i4.1368