Orientation dependent compression behavior of Co35Ni35Al30 single crystals

被引：22

作者：

Li, Peizhen ^{[1
]}

Karaca, Haluk E. ^{[1
]}

Chumlyakov, Yury I. ^{[2
]}

机构：

[1] Univ Kentucky, Dept Mech Engn, Lexington, KY 40506 USA

[2] Tomsk State Univ, Siberian Phys Tech Inst, Tomsk 634050, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 718卷

基金：

美国国家科学基金会;

关键词：

Shape memory alloys; CoNiAl; Single crystal; Two-way shape memory effect; Superelasticity; SHAPE-MEMORY ALLOYS; CO-NI-AL; INDUCED MARTENSITIC-TRANSFORMATION; MAGNETIC-FIELD; PHASE-TRANSFORMATIONS; ELASTIC-CONSTANTS; TEMPERATURE-DEPENDENCE; STRESS; SUPERELASTICITY; CO49NI21GA30;

D O I：

10.1016/j.jallcom.2017.04.307

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co35Ni35Al30 single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98% in [110], 3% in [100] and 0.30% in [111] orientations, respectively. The Co35Ni35Al30 demonstrated a very high superelastic temperature window of more than 350 degrees C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal hysteresis of about 6 degrees C was observed along the [110] orientation. The large decrease of recoverable strain and hysteresis with stress (or temperature) was mainly attributed to the difference of elastic moduli of transforming phases. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：326 / 334

页数：9

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