%0 Journal Article
%T Investigation on the Micro-Deformation Characteristics of Porous NiTi Shape Memory Alloy Using Sem Moir e Method<br>扫描云纹干涉法研究多孔NiTi形状记忆合金的微观形变特性
%A JIANG Haichang
%A DU Hua
%A XIE Huimin
%A RONG Lijian
%A <br>姜海昌
%A 杜 华 谢惠民 戎利建
%J 金属学报
%D 2006
%I 
%X The micro-deformation characteristics of porous NiTi shape memory alloy under compression load have been investigated using SEM Moire method. Strain field distribution, which was calculated from the changes of density and direction of moire at the margin and the center of pore wall, indicated that the failure of porous NiTi alloy can be attributed to the stress concentration near the margin of pore wall. During loading, the margin and center of pore wall endured both shear stress and compressive stress. The stress concentration was formed at the sharp-angled area of pore and induced the crack propagation from the margin of pore wall to the center along 45?angle with the loading direction. Severe deformation occurred at the margin of pore wall after failure, however, the strains were slight at the center of pore wall. Based on the results of Moire, the compressive behavior characteristics of porous NiTi alloy were analyzed.
%K porous NiTi alloy
%K SEM Moird method
%K compressive property
%K self-propagation high-temperature synthesis<br>多孔NiTi合金
%K 扫描云纹技术
%K 压缩性能
%K 自蔓延高温合成
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=AC299AE8DCB2949E&yid=37904DC365DD7266&vid=ECE8E54D6034F642&iid=708DD6B15D2464E8&sid=09D7E2FA8227CA7B&eid=CD1AB74EAF0667FF&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=10