Peculiarities of strain and resistivity variations in TiNi

Citation
Sa. Egorov et al., Peculiarities of strain and resistivity variations in TiNi, COMP MAT SC, 19(1-4), 2000, pp. 77-80
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
COMPUTATIONAL MATERIALS SCIENCE
ISSN journal
0927-0256 → ACNP
Volume
19
Issue
1-4
Year of publication
2000
Pages
77 - 80
Database
ISI
SICI code
0927-0256(200012)19:1-4<77:POSARV>2.0.ZU;2-Q
Abstract
Simultaneous measurements of electrical resistivity and inelastic strain ac cumulation in Ti-49.5 at.% Ni undergoing a two-step B2 --> R --> B19' marte nsitic transformation were performed. To exclude the influence of specimen size changes during the deformation all experiments were made in torsion. I t was detected that noticeable part of strain recovery after heating under a stress and active deformation in martensitic state rakes place before the start of the reverse transformation and is obviously connected with twinni ng. At the same time the two-way shape memory effects are caused by the mar tensitic transformation. The obtained data may be useful for adequate model ling of mechanical properties of the shape memory alloys because allow to c onnect the macroscopic parameters with microscopic physical processes. (C) 2000 Elsevier Science B.V. All rights reserved.