Low temperature carburised austenitic stainless steel formetal-on-metal tribological contact

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Article

Maniscalco, Shaun¹  Conti, Malcolm Caligari¹  Cassar, Josianne¹  Grima, Christian¹  Karl, Andreas²  Wismayer, Pierre Schembri³  Mallia, Bertram¹  Buhagiar, Joseph¹ 

[1] Univ Malta, Dept Met & Mat Engn, MSD2080, Msida, Malta

[2] Bodycote Specialist Technol GmbH, Landsberg, Germany

[3] Univ Malta, Dept Anat, MSD 2080, Msida, Malta

关键词: S-phase;    Expanded austenite;    Carburising;    Corrosion;    Tribocorrosion;    Medical grade austenitic stainless steel;   

DOI  :  10.1016/j.tsf.2016.07.084

来源: Elsevier

【 摘 要 】

S-phase layers formed on biomedical grade austenitic stainless steels have demonstrated significantly enhanced in-vitro wear and corrosion behaviour. To date, most of these tribo-corrosion studies on S-phase treated alloys were conducted using a polycrystalline alumina or cemented tungsten carbide ball as the counterface material. Testing S-phase against S-phase is both scientifically interesting and technologically important in view of their potential applications for the articulating surfaces of metal-on-metal joint prostheses. In this work, biomedical grade 316LVM discs together with AISI 316 balls were lowtemperature carburised. In-vitro corrosion-wear testing using an S-phase engineered ball against an S-phase engineered disc was performed. Such testing was also complemented with electrochemical impedance spectroscopy, potentiodynamic and cytotoxicity tests. The results have shown that the carburised 316LVM alloy was found to have good in-vitro cytocompatibility and an augmented corrosion and corrosion-wear resistance when compared with the untreated alloy. (C) 2016 Elsevier B.V. All rights reserved.

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