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Article type: Research Article
Authors: Peña, J.; | Solano, E. | Mendoza, A. | Casals, J. | Planell, J.A. | Gil, F.J.;
Affiliations: Dept. Ciencia de Materiales e Ingeniería Metalúrgica, E.T.S.E.I.B., Universidad Politécnica de Cataluña, Diagonal 647, 08028-Barcelona, Spain | Dept. Materiales, Elisava-Escuela Superior de Diseño, Ample 11-13, 08002 Barcelona, Spain | Facultad de Odontología, Universidad de Sevilla, Sevilla, Spain
Note: [] Corresponding author: F.J. Gil, Dept. C. Materiales e Ingeniería Metalurgica, ETSEIB, Universidad Politécnica de Catalunya, Av. Diagonal 647, 08028-Barcelona, Spain. Tel.: +34 934016708; E-mail: francesc.xavier.gil@upc.es.
Abstract: The main objective of this work has been the characterisation and correlation of the wear behaviour of the NiTi shape memory alloys in their different phases. The weight losses for the different alloys in function of the present phase, and of the Ms 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 Ms 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.
Keywords: Shape memory alloys, wear, NiTi, superelasticity, articular prosthesis
Journal: Bio-Medical Materials and Engineering, vol. 15, no. 4, pp. 289-293, 2005
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