Dry sliding wear performance of an annealed TiNi alloy with differentnickel contents

Type : Publication
Auteur(s) :  Soumaya MEDDAH, Hacene Chadli, Mounira Bourebia, Alex Montagne, Alain Iost, Mohamed Labaiz, Ahlem Taleb
Année :  2020
Domaine : Métallurgie
Revue : Materials. Research Express
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  TiNi alloy, factorial design, Wear Resistance, superplastic behaviour

Résumé : 

The wear behaviour of the TiNi alloy tested at different conditions (2 and 4Nas applied loads and 40,50 an 60 wt%as nickel contents) was investigated. For this purpose, two main experimentaltechniques consisting of wear and indentation tests were used. Scanning electron microscopy (SEM)and laser source profilometry were employed to reveal the wear mechanisms and the affected wornsurfaces. Furthermore, design of experiments planning introducing factorial design as well as responsesurface was adopted to attempt predicting the coefficient friction according to the planned testparameters. Nanoindentation results showed that all the TiNi alloys are harder than a TA6V4 alloywhich is commonly used in dental implant. Particularly, the TiNi60 alloy exhibited superiorsuperelasticity, characterized by a lower E/Hratio and a higher depth recovery ratio than the TA6V4alloy. Besides, the wear rates underwent a substantial increase with the increase of the applied load buta decrease with increasing the Ni content. The worn surfaces analyses revealed an enhanced resistanceto adhesive and abrasive wear with increasing nickel content.