Transmission electron microscopy investigation of microstructures in low-hysteresis alloys with special lattice parameters

被引：71

作者：

Delville, Remi ^{[1
]}

Schryvers, Dominique ^{[1
]}

Zhang, Zhiyong ^{[2
]}

James, Richard D. ^{[2
]}

机构：

[1] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium

[2] Univ Minnesota, Dept Aerosp Engn & Mech, Minneapolis, MN 55455 USA

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 05期

关键词：

Shape memory alloys (SMA); Transmission electron microscopy (TEM); Martensitic phase transformation; Hysteresis; Twinning; SHAPE-MEMORY ALLOYS; NI-CU ALLOY; MARTENSITIC TRANSFORMATIONS;

D O I：

10.1016/j.scriptamat.2008.10.025

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A sharp drop in hysteresis is observed for shape memory alloys satisfying the compatibility condition between austenite and martensite, i.e. lambda(2) = 1, where lambda(2) is the middle eigenvalue of the transformation strain matrix. The present work investigates the evolution of microstructure by transmission electron microscopy as the composition of the Ti(50)Ni(50-x)Pd(x) system is systemically tuned to achieve the condition lambda(2) = 1. Changes in morphology, twinning density and twinning modes are reported along with twinless martensite and exact austenite-martensite interfaces. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：293 / 296

页数：4

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