Abstract
A sharp drop in hysteresis is observed for shape memory alloys satisfying the compatibility condition between austenite and martensite, i.e. λ2 = 1, where λ2 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 Ti50Ni50-xPdx system is systemically tuned to achieve the condition λ2 = 1. Changes in morphology, twinning density and twinning modes are reported along with twinless martensite and exact austenite-martensite interfaces.
Original language | English (US) |
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Pages (from-to) | 293-296 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 60 |
Issue number | 5 |
DOIs | |
State | Published - Mar 2009 |
Bibliographical note
Copyright:Copyright 2009 Elsevier B.V., All rights reserved.
Keywords
- Hysteresis
- Martensitic phase transformation
- Shape memory alloys (SMA)
- Transmission electron microscopy (TEM)
- Twinning