Surface, Chemical, and Tribological Characterization of an ASTM F-1537 Cobalt Alloy Modified through an Ns-Pulse Laser

Carlos Cuao Moreu, Demófilo Maldonado Cortés, María del Refugio Lara Banda, Edgar O. García Sánchez, Patricia Del Carmen Zambrano-Robledo, MARCO ANTONIO L. HÉRNANDEZ RODRÍGUEZ

Research output: Contribution to journalArticlepeer-review

Abstract

Metallic biomaterials are considered safe materials for the fabrication of orthopedic prostheses due to their mechanical stability. Among this group, cobalt-chromium-molybdenum alloys are commonly used. Nevertheless, adverse reactions on tissues caused by the liberation of metallic ions are a limitation. Therefore, the modification of biometallic material surfaces has become a topic of interest, especially the improvement of the wear resistance to retard the degradation of the surface. In this work, dimples obtained at different processing parameters by an ns-pulse laser were texturized on an ASTM F-1537 cobalt alloy. Surfaces were characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy, and Raman spectroscopy. The mechanical integrity of the surface was evaluated using a 3D surface analyzer and Vickers indentation tests. The tribological response was studied employing a ball-on-disc tribometer under lubricated conditions tracking the coefficient of friction, volume loss, wear rate, and surface damage by SEM. The variation of the laser power, repetition rate, and process repetitions slightly modified the chemistry of the surface (oxides formation). In addition, the rugosity of the zone treated by the laser increased. The texturized samples decreased the wear rate of the surface in comparison with the untreated samples, which was related to the variation of the dimple diameter and dimple depth.
Original languageEnglish
Article number1719
Pages (from-to)1719
JournalMetals
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2021

Bibliographical note

Funding Information:
The authors wish to thank to ?Consejo Nacional de Ciencia y Tecnolog?a? CONACYT for providing a doctoral research fellowship, and to the research grant from UANL (CB 239808 STT-Tribometer). The also express their gratitude to CIDET (FIME), CIIIA, CIIDIT, and UDEM for allowing them to perform each test.

Funding Information:
Acknowledgments: The authors wish to thank to “Consejo Nacional de Ciencia y Tecnología” CONACYT for providing a doctoral research fellowship, and to the research grant from UANL (CB 239808 STT-Tribometer). The also express their gratitude to CIDET (FIME), CIIIA, CIIDIT, and UDEM for allowing them to perform each test.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Metals and Alloys

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