The mechanism of nanocrystalline structure formation in Ni3Al during severe plastic deformation

被引：94
作者：
Korznikov, AV [1 ]
Tram, G
Dimitrov, O
Korznikova, GF
Idrisova, SR
Pakiela, Z
机构：
[1] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia
[2] CNRS, Ctr Etud Chim Met, F-94407 Vitry Sur Seine, France
[3] Univ Technol, Warsaw, Poland
来源：
ACTA MATERIALIA | 2001年 / 49卷 / 04期
关键词：
severe plastic deformation; intermetallic compounds;
D O I：
10.1016/S1359-6454(00)00345-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure evolution of the intermetallic compound Ni3Al during severe deformation by torsion under high quasi-hydrostatic pressure. which eventually results in the formation of a disordered nanocrystalline structure with a high level of internal stresses, was investigated as a function of the amount of shear strain. At the microstructural level, the crystals were first fragmented by the propagation of twins, then nanosized equiaxed crystallites with high misorientations were formed. At the macroscopic level, there is evidence that the cold-worked structure first formed at the sample surface and then propagated into the whole volume. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：663 / 671
页数：9
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