Accès gratuit
Numéro
J. Phys. IV France
Volume 01, Numéro C4, Novembre 1991
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES
Page(s) C4-329 - C5-333
DOI http://dx.doi.org/10.1051/jp4:1991449
EUROPEAN SYMPOSIUM ON MARTENSITIC TRANSFORMATION AND SHAPE MEMORY PROPERTIES

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. BEYER2

1  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