Comparative analysis of the effects of severe plastic deformation and thermomechanical training on the functional stability of Ti50.5Ni24.5Pd25 high-temperature shape memory alloy

被引：48

作者：

Atli, K. C. ^{[1
]}

Karaman, I. ^{[1
,2
]}

Noebe, R. D. ^{[3
]}

Maier, H. J. ^{[4
]}

机构：

[1] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

[2] Texas A&M Univ, Mat Sci & Engn Grad Program, College Stn, TX 77843 USA

[3] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA

[4] Univ Gesamthsch Paderborn, Lehrstuhl Werkstoffkunde Mat Sci, D-33098 Paderborn, Germany

来源：

SCRIPTA MATERIALIA | 2011年 / 64卷 / 04期

基金：

美国国家科学基金会;

关键词：

Equal channel angular extrusion/equal channel angular pressing; TiNiPd; High-temperature shape memory alloys; Training; Actuator; NITI; TRANSFORMATION;

D O I：

10.1016/j.scriptamat.2010.10.022

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We compare the effectiveness of a conventional thermomechanical training procedure and severe plastic deformation via equal channel angular extrusion to achieve improved functional stability in a Ti50.5Ni24.5Pd25 high-temperature shape memory alloy. Thermomechanical testing indicates that both methods result in enhanced shape memory characteristics, such as reduced irrecoverable strain and thermal hysteresis The mechanisms responsible for the improvements are discussed in light of microstructural findings from transmission electron microscopy. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：315 / 318

页数：4

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