Shape memory effect and superelastic behavior of TiNi shape memory alloy processed by vacuum plasma spray method

被引：17
|
作者：
Nakayama, Hiroyuki
Taya, Minoru
Smith, Ronald W.
Nelson, Travis
Yu, Michael
Rosenzweig, Edwin
机构：
[1] Univ Washington, Ctr Intelligent Mat & Syst, Dept Mech Engn, Seattle, WA 98195 USA
[2] Mat Resources Int, Lansdale, PA 19446 USA
[3] USN, Air Syst Command, Patuxent River, MD 20670 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2007年 / 459卷 / 1-2期
关键词：
vacuum plasma spray (VPS); near-net shape; stress-strain curve; superelastic behavior; shape memory effect; martensitic transformation; TiNi alloy;
D O I：
10.1016/j.msea.2007.01.053
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Machining of TiNi shape memory alloy into a complicated three-dimensional (313) shape is quite difficult, thus a near-net shape forming of 3D shaped TiNi alloy is attractive and cost-effective. Vacuum plasma spray (VPS) process is one of such near-net shape forming processes. In this paper, two kinds of thick TiNi layer, Ni-rich and Ti-rich compositions, were fabricated by VPS process and their shape memory effect (SME) and superelastic (SE) behaviors were characterized. As-VPS processed Ni-rich TiNi which was subjected to homogenization at 1163 K for 7.2 ks and subsequent aging at 773 K for 18 ks exhibited good martensitic transformation behavior. The recoverable strain of the TiNi alloys due to SME and SE behavior were measured to be 2.4% and 5.0%, respectively. The Ti-rich TiNi alloy also exhibited good martensitic transformation behavior and SME in the as-homogenized state. (C) 2007 Elsevier B.V. All rights reserved.
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收藏
页码：52 / 59
页数：8
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