Title
Nucleation and growth of the <tex>$Ni_{5}Al_{3}$</tex> phase in Ni-Al austenite and martensite Nucleation and growth of the <tex>$Ni_{5}Al_{3}$</tex> phase in Ni-Al austenite and martensite
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Les Ulis ,
Subject
Physics
Source (journal)
Journal de physique: 4. - Les Ulis, 1991 - 2006
Source (book)
IIIrd European Symposium on Martensitic Transformations (ESOMAT 94), SEP 14-16, 1994, BARCELONA, SPAIN
Volume/pages
5(1995) :C2 , p. 299-304
ISSN
1155-4339
ISI
A1995QX40700047
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The nucleation and growth mechanisms of Ni5Al3 precipitates and microtwinned plates in B2 austenite and 2M (3R) martensite phases are described on the basis of conventional and high resolution electron microscopy. In the Ni62.5Al37.5 B2 austenite matrix short annealings at 550 degrees C introduce three-pointed star shaped precipitates consisting of twin related parts of different variants of the Ni5Al3 structure. Longer annealings result in plates growing separately from these wings and developing microtwinning in order to accommodate stress built-up at the interfaces with the surrounding matrix. Annealing of Ni65Al35 2M martensite plates induces simple reordering into the Ni5Al3 phase, increasing the fct c/a ratio by about 1%. As a result stracking faults are introduced in the smallest twin variants.
E-info
https://repository.uantwerpen.be/docman/iruaauth/1b13d3/3554320.pdf
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