Transformation of Co-Ni-Al single crystals in tension

被引：46

作者：

Hamilton, RF

Sehitoglu, H

Efstathiou, C

Maier, HJ

Chumlyakov, Y

Zhang, XY

机构：

[1] Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA

[2] Univ Gesamthsch Paderborn, D-33095 Paderborn, Germany

[3] Siberian Phys Tech Inst, Tomsk 634050, Russia

来源：

SCRIPTA MATERIALIA | 2005年 / 53卷 / 01期

基金：

美国国家科学基金会;

关键词：

shape memory; pseudoelasticity; critical stress; phase transformation; ferromagnetic shape memory alloy; hysteresis; single crystals; volumetric strain;

D O I：

10.1016/j.scriptamat.2005.01.032

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present for the first time pseudoelasticity and shape memory results on Co-Ni-Al single crystals in tension. The experimental transformation strains approached 6% in tension in the [115] orientation. Despite the considerable volume change (0.0447), the transformation exhibits remarkable pseudoelasticity and shape memory recoverability in tension. A theoretical treatment is presented to explain the tension compression asymmetry in the stress-strain response, the change in transformation hysteresis with stress, and the role of secondary phase on the transformation temperatures. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：131 / 136

页数：6

共 21 条

[1] FINE PHASE MIXTURES AS MINIMIZERS OF ENERGY [J].