Title

Low temperature deformation of the R-phase in a NiTiFe shape memory alloy

Authors

Authors

V. B. Krishnan; S. B. Shmalo; C. R. Rathod; 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

ACQUIRED IN-SITU; TRANSFORMATIONS; Physics, Applied

Abstract

Deformation in the P3 phase (R-phase) of NiTiFe was investigated by in situ neutron diffraction during compressive loading at cryogenic temperatures. At 216 K, upon loading the R-phase detwinned and subsequently underwent a reversible stress-induced transformation to the B19' phase (martensite). At 92 K on the other hand, detwinning was suppressed and the stress-induced martensite formed did not transform back upon unloading. The experiments also directly observed a hitherto theoretically predicted B33 phase. Rietveld refinement of the neutron diffraction spectra were used to determine lattice parameters of the B33 and R-phases. Plane-specific elastic moduli were also determined for the R-phase. (C) 2010 American Institute of Physics. [doi:10.1063/1.3481694]

Journal Title

Applied Physics Letters

Volume

97

Issue/Number

9

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

3

WOS Identifier

WOS:000282187200019

ISSN

0003-6951

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