Issue |
J. Phys. IV France
Volume 01, Number C4, Novembre 1991
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES
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Page(s) | C4-329 - C5-333 | |
DOI | https://doi.org/10.1051/jp4:1991449 |
J. Phys. IV France 01 (1991) C4-329-C5-333
DOI: 10.1051/jp4:1991449
THE TEXTURE DEVELOPMENT OF Ti-Ni-Cu WIRE DURING THERMOMECHANICAL CYCLING
P.F. WILLEMSE1, B.J. KOOPMAN1 and J. BEYER21 University of Twente, Faculty of Mechanical Engineering, Laboratory for Materials Science, PO. Box 217, NL-7500 AE Enschede, The Netherlands
2 University of Twente, Faculty of Mechanical Engineering, Laboratory for Materials Science, PO. Box 217, NL-7500 AE Enschede, The Netherlands
Abstract
An investigation has been carried out on the texture of Ti-44Ni-5Cu (at %) shape memory alloy wire. The texture of the B2 and monoclinic phases has been determined as a function of the degree of cold deformation during the drawing process and the number of cycles on thermomechanical cycling. After cold drawing and anlealing (823 K, 180 s) under tensile stress, the [110], [1(-1)0] [101] and [(-1)01] directions in the monoclinic phase are parallel to the wire axis. In this condition a preference for the [(-1)01] component is observed. On heating the wire above Af and cooling down, this preference disappears. Subsequently the preference develops again on thermomechanical cycling. The B2 phase shows in all conditions a <111> fiber texture. The observed preference of the [(-1)01] fiber
texture component in the monoclinic phase is discussed in terms of strain
accomodation during plastic deformation.
© EDP Sciences 1991