Journal
SCRIPTA MATERIALIA
Volume 60, Issue 5, Pages 293-296Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.10.025
Keywords
Shape memory alloys (SMA); Transmission electron microscopy (TEM); Martensitic phase transformation; Hysteresis; Twinning
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Funding
- Marie Curie Research Training Network [MRTN-CT-2004-505226]
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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.
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