Browsing by Author "Taha, Ziad A."

Now showing 1 - 2 of 2

Effect of Scan Speed on Corrosion and Tribocorrosion Properties of Cobalt-Chromium Alloy in Situ Produced by Selective Laser Melting
(Emerald Group Publishing Ltd, 2024) Alaloosi, Raghad Ahmed; Comakli, Onur; Yazici, Mustafa; Taha, Ziad A.
Purpose - This paper aims to investigate the influence of scan speed on the corrosion and tribocorrosion features of the CoCrMoW samples fabricated via the selective laser melting (SLM) process.Design/methodology/approach - CoCrMoW samples were produced by SLM at different scan speeds. Produced samples were made via structural surveys (X-ray diffraction examinations and scanning electron microscopic analyses), hardness measurements and electrochemical and tribocorrosion experiments.Findings - Outcomes displayed that the corrosion and tribocorrosion properties of CoCrMoW alloy were significantly influenced by scanning speeds. Also, these properties of the alloy increased with increasing scanning speeds. CoCrMoW samples produced at a laser scan speed of 1,000 mm/s showed the best resistance to corrosion and tribocorrosion. This could be related to the high hardness and low grain structure of the fabricated samples.Originality/value - This paper may be a practical reference and offers insight into the effect of scanning speeds on the increase of hardness, tribological and corrosion performance of CoCrMoW alloys. This study can help in the further advancement of cobalt-chromium alloy in situ produced by SLM for both electrochemical and tribocorrosion behavior for biomedical applications.
Influence of Scanning Velocity on a CoCrMoW Alloy Built Via Selective Laser Melting: Microstructure, Mechanical, and Tribological Properties
(Springer, 2023) Al-Aloosi, Raghad Ahmed; Comakli, Onur; Yazici, Mustafa; Taha, Ziad A.
In this study, CoCrMoW samples were produced by selective laser melting (SLM). The influence of scanning velocity on the microstructure, mechanical, and wear properties of the fabricated samples was investigated. Experimental outcomes indicated the samples produced with higher scan velocity showed higher microhardness as well as higher tensile strength values due to refined grains. Also, these values increased with increasing scan velocity. The influence of scan velocity on the wear performance of the CoCrMoW alloys was observed. Although the COF values of the samples increased with the increment in scanning velocity, their wear rate decreased. The excellent wear resistance of the samples fabricated with laser scanning velocity of 1000 mm/s could be related to their high microhardness. Furthermore, this work may help in the further advancement of CoCrMoW alloys.