J. Phys. IV France
Volume 112, October 2003
Page(s) 1141 - 1145

J. Phys. IV France
112 (2003) 1141
DOI: 10.1051/jp4:20031084

Effect of the $M_{\rm s}$ transformation temperature on the wear behaviour of NiTi and CuZnAl shape memory alloys

J. Peña1, 2, J. Casals1, F.J. Gil1 and J.A. Planell1

1  Dept. Ciencia de Materiales e Ingenieria Metalurgica, ETSEIB, Universidad Politécnica de Canaluna, Diagonal 647, 08028 Barcelona, Spain
2  Dept. Materiales, Elisava-Escuela Superior de Diseno, C/Ample 11-13, 08002 Barcelona, Spain

The main objective of this work has been the characterisation and correlation of the wear behaviour of the NiTi and CuZnAl shape memory alloys in their different phases. The weight losses for the different alloys in function of the present phase, and of the M $_{\rm s}$ transformation temperature are studied. Adhesive wear tests, Pin-on-Disk, according to the ASTM-G99 standard have been carried out.

The thermoelastic martensitic transformations that cause the superelastic effect, the reorientation and coalescence of martensitic plates and the damping effect promotes a high ability to accommodate large deformations without generating permanent damages that causes the wear. The resulting plastic deformation may be accumulated during wear process without generating fracture. The results show that the wear resistance is mainly dependent of the M $_{\rm s}$ transformation temperature for both alloys. For the NiTi alloys also the Ni atomic percentage and the hardness of the alloys are important parameters in the wear behavior.

© EDP Sciences 2003