TY - JOUR
T1 - Compressive behavior of 64% porosity NiTi alloy
T2 - An experimental study
AU - Guo, Zhiqiang
AU - Xie, Huimin
AU - Dai, Fulong
AU - Qiang, Haichang
AU - Rong, Lijian
AU - Chen, Pengwan
AU - Huang, Fenglei
PY - 2009/7/25
Y1 - 2009/7/25
N2 - 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 moiré 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 moiré 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.
AB - 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 moiré 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 moiré 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.
KW - 64% porosity NiTi alloy
KW - Full-field surface deformation
KW - Loading-unloading history
KW - Metallographical analysis
UR - http://www.scopus.com/inward/record.url?scp=65449181043&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2009.03.083
DO - 10.1016/j.msea.2009.03.083
M3 - Article
AN - SCOPUS:65449181043
SN - 0921-5093
VL - 515
SP - 117
EP - 130
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 1-2
ER -