Title
In situ high resolution electron microscopy observation of electron-irradiation-induced martensitic transformation in a <tex>$Ni_{63}Al_{37}$</tex> alloy In situ high resolution electron microscopy observation of electron-irradiation-induced martensitic transformation in a <tex>$Ni_{63}Al_{37}$</tex> alloy
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Journal of alloys and compounds. - Amsterdam
Volume/pages
199(1993) :1-2 , p. 1-6
ISSN
0925-8388
ISI
A1993LV15200004
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
An electron-irradiation-induced transformation from cubic beta2 austenite to monoclinic 7M martensite was observed in situ under high resolution electron microscopy conditions in a thin foil of Ni63Al37 beta2 phase (B2, CsCl structure), with the start temperature of the martensitic transformation below but very close to room temperature. The structure of the martensite is consistent with thermoelastic or stress-induced martensite at this composition, including the existence of multiple stacking faults. The transformation is described by a gradual increase in the shear and shuffle amplitudes already existing in the precursor domains. Possible origins of the transformation are discussed.
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