On the origin of Luders-like deformation of NiTi shape memory alloys
On the origin of Luders-like deformation of NiTi shape memory alloys
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DOI：
10.1016/j.jmps.2005.03.005
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发表时间：
2005-08-01
影响因子：
5.3
通讯作者：
Novak, V
中科院分区：
文献类型：
--
作者：
Sittner, P;Liu, Y;Novak, V
多晶NiTi形状记忆合金在拉伸变形时，在宏观剪切带中表现出变形的局部化和扩展。变形带的扩展具有平台型应力-应变曲线的特征。这种行为仅在NiTi合金中有报道，并且仅在拉伸状态下。这种行为的原因尚不清楚，虽然在文献中提出了不同的假设。本文简要地总结了有关的实验证据，并基于多晶NiTi的伪弹性细观力学模型给出了解释。(c)2005爱思唯尔有限公司保留所有权利。
Polycrystalline NiTi shape memory alloys deformed in tension tend to exhibit localization and propagation of deformation in macroscopic shear bands. The propagation of the deformation bands is characterized by a plateau-type stress-strain curve. Such behavior has been reported only for NiTi alloys and only in tension. The reason for this behavior is still unclear although different hypotheses have been proposed in the literature. This article briefly summarizes relevant experimental evidences and offers an explanation based on micromechanics modelling of pseudoelasticity of polycrystalline NiTi. (c) 2005 Elsevier Ltd. All rights reserved.