Strain rate sensitivity and deformation activation volume of coarse-grained and ultrafine-grained TiNi alloys

被引：20

作者：

Gunderov, D. V. ^{[1
,2
,4
]}

Maksutova, G. ^{[1
]}

Churakova, A. ^{[1
,2
]}

Lukyanov, A. ^{[1
]}

Kreitcberg, A. ^{[3
]}

Raab, G. I. ^{[1
,4
]}

Sabirov, I. ^{[5
]}

Prokoshkin, S. ^{[3
]}

机构：

[1] Ufa State Aviat Tech Univ, Ufa 450000, Russia

[2] Inst Mol & Crystal Phys RAS, Ufa, Russia

[3] Natl Univ Sci & Technol MISIS, Moscow, Russia

[4] Kazan Fed Univ, Kazan, Russia

[5] IMDEA Mat Inst, Madrid, Spain

来源：

SCRIPTA MATERIALIA | 2015年 / 102卷

关键词：

TiNi alloys; Severe plastic deformation; Ultra-fine grained material; Strain rate sensitivity; Activation volume; SEVERE PLASTIC-DEFORMATION; SHAPE-MEMORY ALLOYS; THIN-FILMS; BEHAVIOR; MARTENSITE; MECHANISM;

D O I：

10.1016/j.scriptamat.2015.02.023

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Two TiNi alloys, Ti49.4Ni50.6 and Ti50Ni50, are subjected to equal-channel angular pressing (ECAP) resulting in the formation of a homogeneous ultra-fine grained microstructure. Tensile tests and strain rate jump tests are carried out in the temperature range of 25-400 degrees C to measure mechanical properties and strain rate sensitivity of both alloys before and after ECAP processing. Effect of grain size on mechanical behavior, strain rate sensitivity and mechanisms operating during plastic deformation of both alloys in the given temperature range is discussed. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：99 / 102

页数：4

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