Numéro
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82
International Conference on Martensitic Transformations
Page(s) C4-517 - C4-522
DOI https://doi.org/10.1051/jphyscol:1982480
ICOMAT-82
International Conference on Martensitic Transformations

J. Phys. Colloques 43 (1982) C4-517-C4-522

DOI: 10.1051/jphyscol:1982480

PAIRED-MARTENSITE IN Fe-30%Ni SINGLE CRYSTALS

H.R. Clark1, 2

1  MIT, Cambridge, MA, U.S.A.
2  Western Electric, Engineering Research Center, Princeton, NJ., USA.


Abstract
The variants of martensite forming isothermally in Fe-30%Ni single crystals at temperatures above Mb appear in pairs. This "paired-martensite" was found to be a bulk morphology and one which exhibits strong, non-bursting autocatalysis. Individual pairs are comprised of two lath-shaped wings which meet edge-on along a {100} junction plane, and groups of pairs aligned along the traces of the {100} planes were observed. The major component of the shape-change of a wing was found to be along its long dimension. The role of this shape-change in the autocatalytic formation of the morphology and the relation of paired-martensite to lath and plate martensite are considered.