Title
Transmission electron microscopy study of phase compatibility in low hysteresis shape memory alloys Transmission electron microscopy study of phase compatibility in low hysteresis shape memory alloys
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Engineering sciences. Technology
Source (journal)
PHILOSOPHICAL MAGAZINE
Philosophical magazine
Volume/pages
90(2010) :1/4 , p. 177-195
ISSN
1478-6435
ISI
000274576500013
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Recent findings have linked low hysteresis in shape memory alloys with phase compatibility between austenite and martensite. To investigate the evolution of microstructure as phase compatibility increases and hysteresis is reduced, transmission electron microscopy was used to study the alloy system Ti50Ni50xPdx, where the composition is systemically tuned to approach perfect compatibility. Changes in morphology, twinning density and twinning modes are reported, along with special microstructures occurring when compatibility is achieved. In addition, the interface between austenite and a single variant of martensite was studied by high-resolution and conventional electron microscopy. The low energy configuration of the interface detailed in this article suggests that it plays an important role in the lowering of hysteresis compared to classical habit plane interfaces.
E-info
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