Title

Neutron diffraction investigation of hysteresis reduction and increase in linearity in the stress-strain response of superelastic NiTi

Authors

Authors

C. R. Rathod; B. Clausen; M. A. M. Bourke;R. Vaidyanathan

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

SHAPE-MEMORY PHENOMENA; TINI ALLOY; MARTENSITIC TRANSFORMATIONS; THERMODYNAMIC ANALYSIS; PHASE-FRACTION; MICROSTRUCTURE; BEHAVIOR; TEXTURE; Physics, Applied

Abstract

In situ neutron diffraction measurements during loading have been performed on plastically deformed superelastic NiTi samples. The measurements observed retained B19' phase in the unloaded state as a result of the plastic deformation in otherwise completely B2 phase samples. A reversible stress-induced B2-B19' transformation on application and removal of stress occurred in the presence of this retained B19' phase. The amount and orientation of this retained B19' phase changed with cycling. Such direct atomic scale observations in the bulk are used here for the first time to qualitatively elucidate the macroscopic stress-strain response in plastically deformed superelastic NiTi. (c) 2006 American Institute of Physics.

Journal Title

Applied Physics Letters

Volume

88

Issue/Number

20

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000237682100038

ISSN

0003-6951

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