Wear Resistance and Non-Magnetic Layer Formation on 316L Implant Material with Plasma Nitriding

• Published in: Journal of bionics engineering 2014-10, Vol.11 (4), p.620-629
• Main Authors: Yetim, Ali Fatih, Yazıcı, Mustafa
• Format: Article
• Language: English
• Subjects: 316L stainless steel; 316L不锈钢; Artificial Intelligence; Biochemical Engineering; Bioinformatics; Biomaterials; Biomedical Engineering and Bioengineering; Biomedical Engineering/Biotechnology; electrical resistivity; Engineering; magnetic properties; plasma nitriding; wear; 植入材料; 氮化处理; 渗氮温度; 磁性层; 离子渗氮; 等离子体; 耐磨性
• ISSN: 1672-6529; 2543-2141
• DOI: 10.1016/S1672-6529(14)60073-1

In this study, the applicability of plasma nitriding treatment in the production of non-magnetic and corrosion resistant layer on 316L stainless steel implant material was investigated. 316L stainless steel substrates were plasma nitrided at temperatures of 350 ℃, 375 ℃, 400 ℃, 425 ℃ and 450 ℃ for 2 h in a gas mixture of 50% N2-50% H2, respectively. It was determined that the treatment temperature is the most important factor on the properties of the corrosion resistant layer of 316L stainless steel. The results show that s-phase formed at the temperatures under 400 ℃, and at the temperatures above 400 ℃, instead of s-phase, CrN and y＇-Fe4N phases were observed in the modified layer. The electrical resistivity and surface roughness of the modified layer increase with treatment temperature. Under 400 ℃ the corrosion resistance increased with the temperature, above 400 ℃ it decreased with the increase in treatment temperature. It was analyzed that the electrical resistivity and the soft （ideal） ferro- magnetic properties of 316L stainless steel increased with treatment temperature during nitriding treatment. Also, plasma ni- triding at low temperatures provided magnetic behavior close to the ideal untreated 316L stainless steel.