Compressive behavior of 64% porosity NiTi alloy: An experimental study

被引：20

作者：

Guo, Zhiqiang ^{[1
]}

Xie, Huimin ^{[1
]}

Dai, Fulong ^{[1
]}

Qiang, Haichang ^{[2
]}

Rong, Lijian ^{[2
]}

Chen, Pengwan

Huang, Fenglei

机构：

[1] Tsinghua Univ, Dept Engn Mech, FML, Beijing 100084, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 515卷 / 1-2期

关键词：

64% porosity NiTi alloy; Loading-unloading history; Full-field surface deformation; Metallographical analysis;

D O I：

10.1016/j.msea.2009.03.083

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

An experimental investigation of the compressive behavior of 64% porosity NiTi alloy was undertaken in this study. Both quasi-static and low-frequency fatigue compressive tests were carried out to obtain the compressive stress-strain curves of specimens. Special attention was paid to the loading-unloading history effect on the stress-strain curves. Full-field surface deformation measurement was carried out via moire interferometry when specimens were compressed. Inhomogeneous deformation property of the material caused by the porous structure was clearly presented. The loading-unloading history effect was also studied using the moire interferometry method. Finally real time metallographic analysis during compression tests explained the causes of the loading-unloading history effect of the porous material from microscopic point of view. These findings are believed to be essential elements in the theoretical modeling of compressive behavior especially loading-unloading history effect of the high porosity NiTi alloy, and. which still need further systematic examination in the future. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：117 / 130

页数：14

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