Quazi, Moinuddin Mohammed and Ishak, Mahadzir and Arslan, Ahmed and Fazal, M.A. and Yusof, Farazila and Sazzad, B.S. and Bashir, Muhammad Nasir and Jamshaid, Muhammad (2018) Mechanical and tribological performance of a hybrid MMC coating deposited on Al–17Si piston alloy by laser composite surfacing technique. RSC Advances, 8 (13). pp. 6858-6869. ISSN 2046-2069, DOI https://doi.org/10.1039/c7ra08191j.
Full text not available from this repository.Abstract
Laser composite surfacing (LCS) is a photon driven manufacturing technology that can be utilized for depositing hybrid metal matrix composite coatings (HMMC) on softer Ti/Al/Mg alloys to enhance their tribo-mechanical properties. LCS offers the advantages of higher directionality, localized microstructural refinement and higher metallurgical bonding between coating and substrate. The current research presents the tribo-mechanical evaluation and characterization of solid lubricant based Ni-WC coatings deposited by LCS on Al-Si piston alloy by varying the concentration of graphite between 5-to-15-weight percentage. The tribological behavior of LCS samples was investigated using a ball-on-plate tribometer. Results indicate that the surface hardness, wear rate and friction coefficient of the Al-Si hypereutectic piston alloy were improved after LCS of graphite based HMMC coatings. The maximum surface hardness of 781Hv was acquired for the Ni-WC coating containing 5 wt% graphite. The friction coefficient of Al-Si under dry sliding conditions was reduced from 0.47 to 0.21. The reduction in the friction coefficient was attributed to the formation of a shearable transfer layer, which prevented delamination and reduced adhesion, abrasion and fatigue cracking.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya Research Grant (UMRG, RP035A-15AET), University Malaysia Pahang (Grant No. RDU150378) |
| Uncontrolled Keywords: | Friction coefficients; Hybrid metal matrix composites; Manufacturing technologies; Mechanical evaluation; Metallurgical bonding; Microstructural refinement; Tribological behaviors; Tribological performance |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 18 Apr 2019 06:23 |
| Last Modified: | 18 Apr 2019 06:23 |
| URI: | http://eprints.um.edu.my/id/eprint/21002 |
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