In situ neutron diffraction study of twin reorientation and pseudoplastic strain in Ni-Mn-Ga single crystals

被引：10

作者：

Pramanick, A. ^{[1
]}

An, K. ^{[1
]}

Stoica, A. D. ^{[1
]}

Wang, X. -L. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 06期

关键词：

Magnetic shape memory alloys; Neutron diffraction; Twinning; Heusler alloys; Transition metals; FIELD-INDUCED STRAIN; SHAPE-MEMORY ALLOYS; MARTENSITIC PHASES; FORM-FACTOR; MAGNETIZATION;

D O I：

10.1016/j.scriptamat.2011.06.022

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Twin variant reorientation in single-crystal Ni-Mn-Ga during quasi-static mechanical compression was studied using in situ neutron diffraction. The volume fraction of reoriented twin variants for different stress amplitudes were obtained from the changes in integrated intensities of high-order neutron diffraction peaks. It is shown that, during compressive loading, similar to 85% of the twins were reoriented parallel to the loading direction resulting in a maximum pseudoplastic strain of similar to 5.5%, which is in agreement with measured macroscopic strain. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：540 / 543

页数：4

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