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Home ESOMAT 2009 - 8th European Symposium on Martensitic Transformations Article
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Issue ESOMAT 2009
2009
Article Number 02028
Number of page(s) 7
Section Principles, Simulations, Materials: Background
DOI http://dx.doi.org/10.1051/esomat/200902028
Published online 01 September 2009

ESOMAT 2009, 02028 (2009)
DOI: 10.1051/esomat/200902028

A comparative study of martensite crystal lattice in nanostructured, quenched and deformed Ti-Ni shape memory alloys

S.D. Prokoshkin1, A.V. Korotitskiy1, V. Brailovski1, 2, K.E. Inaekyan1, 2 and S.M. Dubinskiy1

1  Department of Plastic Deformation of Special Alloys, Moscow Institute of Steel and Alloys, 4, Leninsky prosp., Moscow 119049, Russia
2  Mechanical Engineering Department, Ecole de Technologie Superieure, 1100, Notre-Dame Street West, Montreal, H3C 1K3, Canada

prokoshkin@tmo.misis.ru

Published online: 1 September 2009

Abstract
The crystal lattices of cooling-induced (thermal) martensites formed in thermally and thermomechanically treated Ti-Ni Shape Memory Alloys (SMA) and stress-induced, reoriented and plastically deformed martensites were studied using the X-ray diffraction method. The linear dependences of the quenched B19’-martensite lattice parameters (LPs), maximum transformation lattice strain in single- and polycrystalline B2-austenites as well as its crystallographic direction on nickel concentration in the hyperequiatomic range are presented. The lattice parameters and maximum transformation lattice strain of martensite formed from nanocrystalline or polygonized austenites differ from those of quenched martensite formed from recrystallized austenite. The averaged LPs of stress-induced, reoriented and moderately plastically deformed martensites are close to the lattice parameters of quenched martensite.



© Owned by the authors, published by EDP Sciences 2009


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