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Influence of pulse duration and frequency of laser surface texturing on the surface roughness and microstructure of CoCr28Mo alloy for biomedical applications

  • Şefika Kasman

    Şefika Kasman got her PhD in Mechanical Engineering from Ege University, Turkey, in 2010. Since 2017, she has served as a Professor at the Department of Mechanical Engineering at Dokuz Eylul University, Turkey. Her research interests include aluminum casting, laser milling, laser surface processing, surface engineering of biomedical materials, and friction stir welding.

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    , Sertan Ozan

    Sertan Ozan got his PhD in Mechanical Engineering from Ege University, Turkey, in 2015. Since 2021, he has served as an Associate Professor at the Department of Mechanical Engineering at Yozgat Bozok University, Turkey. His research focuses on the mechanical characteristics of nonferrous alloys and their nonconventional manufacturing methods.

    and Cuie Wen

    Dr. Cuie Wen serves as a Professor of Biomaterials Engineering at RMIT University and directs the biomaterials research team. This team’s research centers on biocompatible titanium alloys and scaffolds, shape memory alloys and surface modifications, biodegradable magnesium alloys, nanostructured metals, alloys and composites, metal foams, and nanolaminates. Before moving to Australia, she was employed at the National Institute of Advanced Industrial Science and Technology in Japan. She has authored more than 300 peer-reviewed articles.

Published/Copyright: December 6, 2024
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Abstract

This study presents the effects of pulse duration and frequency in laser surface texturing on the surface roughness and microstructure of CoCr28Mo alloy for biomedical applications. Texturing of the alloy surface was performed using 20 W fiber laser marking equipment. The pulse duration ranged from 50 to 300 ns and the frequency from 100 to 200 kHz. Higher frequencies generally correlated with reduced surface roughness, whereas pulse duration exhibited fluctuation. Statistical analyses confirmed the significance of both parameters and their interaction in affecting the surface roughness of the alloy. Optimal conditions with a pulse duration of 200–300 ns and a frequency of 200 kHz suggest potential for achieving a surface roughness less than 2 µm. The lowest surface roughness value of 0.81 ± 0.04 µm was achieved at a frequency of 200 kHz and a pulse duration of 300 ns. After removing the metal from the surface using this frequency and pulse duration during laser texturing, metal residues accumulated on the textured surface in spherical and layered forms, significantly affecting the surface roughness. This study emphasizes the complex relationship between laser surface-texturing processing parameters and surface properties, providing a promising approach for achieving the highly desirable surface roughness for biomedical applications.


Corresponding author: Şefika Kasman, Department of Mechanical Engineering, Dokuz Eylul University, Izmir, 35390, Türkiye E-mail:

Funding source: Dokuz Eylul University

Award Identifier / Grant number: 2021.KB.FEN.043

About the authors

Şefika Kasman

Şefika Kasman got her PhD in Mechanical Engineering from Ege University, Turkey, in 2010. Since 2017, she has served as a Professor at the Department of Mechanical Engineering at Dokuz Eylul University, Turkey. Her research interests include aluminum casting, laser milling, laser surface processing, surface engineering of biomedical materials, and friction stir welding.

Sertan Ozan

Sertan Ozan got his PhD in Mechanical Engineering from Ege University, Turkey, in 2015. Since 2021, he has served as an Associate Professor at the Department of Mechanical Engineering at Yozgat Bozok University, Turkey. His research focuses on the mechanical characteristics of nonferrous alloys and their nonconventional manufacturing methods.

Cuie Wen

Dr. Cuie Wen serves as a Professor of Biomaterials Engineering at RMIT University and directs the biomaterials research team. This team’s research centers on biocompatible titanium alloys and scaffolds, shape memory alloys and surface modifications, biodegradable magnesium alloys, nanostructured metals, alloys and composites, metal foams, and nanolaminates. Before moving to Australia, she was employed at the National Institute of Advanced Industrial Science and Technology in Japan. She has authored more than 300 peer-reviewed articles.

  1. Research ethics: Not applicable.

  2. Informed consent: Not applicable.

  3. Author contributions: ŞK and SO: conceptualization, methodology, investigation, validation, visualization, writing – original draft. CW: conceptualization, supervision, writing – review and editing.

  4. Use of Large Language Models, AI and Machine Learning Tools: None declared.

  5. Conflict of interests: The authors declare no competing interests.

  6. Research funding: ŞK and SO acknowledge the financial support (purchasing the CoCr28Mo alloy rod) for this research by the Scientific Research Funds of Dokuz Eylul University through Project 2021.KB.FEN.043.

  7. Data availability: Not applicable.

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Published Online: 2024-12-06
Published in Print: 2025-01-29

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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