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Effect of Laser Remelting of Fe-Based Thermally Sprayed Coating on AZ91 Magnesium Alloy on Its Structural and Tribological Properties
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SYSNO ASEP 0574798 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of Laser Remelting of Fe-Based Thermally Sprayed Coating on AZ91 Magnesium Alloy on Its Structural and Tribological Properties Author(s) Buchtík, M. (CZ)
Březina, M. (CZ)
Mrňa, Libor (UPT-D) RID, ORCID, SAI
Palán, M. (CZ)
Filipenský, J. (CZ)
Doležal, P. (CZ)
Nečas, D. (CZ)
Frýza, J. (CZ)
Kajánek, D. (SK)
Wasserbauer, J. (CZ)
Doskočil, L. (CZ)Number of authors 11 Article number 1033 Source Title Coatings. - : MDPI
Roč. 13, č. 6 (2023)Number of pages 16 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords AZ91 ; magnesium alloy ; HVOF coating ; laser remelting ; tribological properties ; wear behavior Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 001014250600001 EID SCOPUS 85163813784 DOI 10.3390/coatings13061033 Annotation An Fe-based coating was thermally sprayed onto the surface of AZ91 magnesium alloy via the High-Velocity-Oxygen-Fuel (HVOF) method. The thermally sprayed coating with a thickness of 530 ± 25 µm and a porosity of 0.7 ± 0.1% did not show any macrostructural defects and did not cause any degradation of the AZ91 alloy. Laser remelting of the surface layer of the sprayed coating resulted in the recrystallization of the structure and the disappearance of presented pores, splat boundaries, and other defects. This led to an increase in the hardness of the remelted layer from the original 535 ± 20 HV0.3 up to 625 ± 5 HV0.3. However, during the laser remelting at a laser power of 1000 W, stress cracking in the coating occurred. The tribological properties were evaluated by the ball-on-plate method under dry conditions. Compared to the uncoated AZ91 magnesium alloy, a higher value of friction coefficient (COF) was measured for the as-sprayed coating. However, there was a decrease in wear rate and weight loss. The remelting of the surface layer of the as-sprayed coating led to a further decrease in the wear rate and weight loss. Based on the obtained data, it has been shown that the application of laser-remelted thermally sprayed Fe-based coatings on AZ91 Mg alloy improves hardness and tribological properties compared to bare Mg alloy and as-sprayed Fe-based coatings. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2024 Electronic address https://www.mdpi.com/2079-6412/13/6/1033
Number of the records: 1