Structural anelasticity, elasticity and broken ergodicity in Ni-Ti shape memory alloys

被引：32

作者：

Kustov, S. ^{[1
]}

Salas, D. ^{[1
]}

Cesari, E. ^{[1
]}

Santamarta, R. ^{[1
]}

Mari, D. ^{[2
]}

Van Humbeeck, J. ^{[3
]}

机构：

[1] Univ Illes Balears, Palma de Mallorca, Spain

[2] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

[3] Katholieke Univ Leuven, Leuven, Belgium

来源：

ACTA MATERIALIA | 2014年 / 73卷

关键词：

Shape memory; Martensitic transformation; Internal friction; Elasticity; INTERNAL-FRICTION; ELECTRICAL-RESISTIVITY; STRAIN GLASS; R-PHASE; FE; TRANSFORMATION; POLARIZATION; TRANSITIONS;

D O I：

10.1016/j.actamat.2014.04.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New data are presented on dynamic measurements of elasticity and anelasticity of several poly- and single crystalline Ni1+xTi1-x alloys for frequencies between 0.05 and 100 kHz over a wide temperature range below room temperature. Anelastic effects, previously attributed to "strain glass freezing", exist and are even intensified in alloys close to the equiatomic composition, which are not expected to demonstrate the "strain glass" state. We also compare the results of static zero-field-cooling and field-cooling experiments for normally transforming and non-transforming alloys and show that a strain maximum in static zero-field-cooling tests for high-Ni-content alloys attributed to "strain glass freezing" is due to elastic strain, which was not previously taken into account. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：275 / 286

页数：12

共 51 条

[1] CALCULATIONS OF DIELECTRIC-PROPERTIES FROM THE SUPERPARAELECTRIC MODEL OF RELAXORS [J].