Tribological Behavior Analysis of the ISO 5832-1 Austenitic Stainless-Steel Treated by Optical Fiber Laser Used for Biomedical Applications

• Autor(a) principal: MACEDO, MARCELO DE MATOS
• Data de Publicação: 2019
• Outros Autores: Ronaldo Câmara Cozza
• Tipo de documento: Artigo
• Título da fonte: Biblioteca Digital de Teses e Dissertações da FEI
• Texto Completo: https://repositorio.fei.edu.br/handle/FEI/3513
• topic: Biomaterials; Austenitic stainless-steel; Optical fiber laser; Micro-abrasive wear; Wear resistance

The present work analyzed the influence of an optical fiber laser surface treatment process on the tribological behavior of the ISO 5832-1 austenitic stainless-steel, basing on the wear volume and friction coefficient. Specimen of this biomaterial were treated by alternating the laser frequency, in order to find out a condition that improves its tribological resistance. Ball-cratering micro-abrasive wear tests were carried out with a test ball of AISI 316L stainless-steel, used as counter-body, and an abrasive slurry prepared with abrasive particles of black silicon carbide (SiC) and distilled water. The micro-abrasive wear tests results indicated that: i) the hardness of the ISO 5832-1 austenitic stainless-steel increased as a function of the laser frequency, decreasing, consequently, the wear volume, as predicted by Archard's Law; ii) the friction coefficient did not present a proportional behavior with the increase of the optical fiber laser frequency; iii) the best condition to improve the wear resistance of the ISO 5832-1 austenitic stainless-steel was obtained adopting an optical fiber laser frequency of 350 kHz, being reported the lower wear volume.