High-quality molybdenum coating has been successfully deposited on the pure aluminium substrate by high-velocity oxygen fuel spraying and subsequent laser remelting and laser cladding process. The microstructure, bonding strength, micro-hardness and wear resistance of the coating were systematically investigated. Results showed that the obtained coating exhibits a good metallurgical bonding interface as well as a dense microstructure with Al8Mo3, AlMo3 and Al5Mo phases, which results in the significant improvement of the mechanical properties of the coating. The bonding strength is increased from 11 ± 1 to 57 ± 4 MPa after laser treatment. Micro-hardness of the coating (480 ± 30 HV) is observed to be increased by about 70% in comparison with the as-sprayed coating (281 ± 8 HV). The wear resistance of the Mo coating was also increased about five to six times by the laser remelting and cladding process.
LiY, LiH, KatgermanL, . Recent advances in hot tearing during casting of aluminium alloys. Prog Mater Sci. 2021;117:100741. DOI:10.1016/j.pmatsci.2020.100741.
2.
ZhengQ, ZhangL, JiangH, . Effect mechanisms of micro-alloying element La on microstructure and mechanical properties of hypoeutectic Al–Si alloys. J Mater Sci Technol. 2020;47:142–151.
3.
ChiY, GuG, YuH, . Laser surface alloying on aluminum and its alloys: a review. Opt Laser Eng. 2018;100:23–37.
4.
SunYJ, YangR, XieL, . Interfacial bonding and corrosion behaviors of HVOF-sprayed Fe-based amorphous coating on 8090 Al–Li alloy. Surf Coat Technol. 2022;436:128316.
5.
ChiY, MengX, DouJ, . Laser alloying with Fe-B4C-Ti on AA6061 for improved wear resistance. Surf Eng. 2021;37(12):1503–1513.
6.
WuJ, ZhangSD, SunWH, . Influence of oxidation related structural defects on localized corrosion in HVAF-sprayed Fe-based metallic coatings. Surf Coat Technol. 2018;335:205–218.
7.
WuNC, ChenK, SunWH, . Correlation between particle size and porosity of Fe-based amorphous coating. Surf Eng. 2018;35(1):37–45.
8.
SpiesHJ.Surface engineering of aluminium and titanium alloys: an overview. Surf Eng. 2010;26(1–2):126–134.
9.
SiddiquiAA, DubeyAK.Recent trends in laser cladding and surface alloying. Opt Laser Technol. 2021;134:106619.
10.
MancoE, CozzolinoE, AstaritaA.Laser polishing of additively manufactured metal parts: a review. Surf Eng. 2022;38(3):217–233.
11.
SunG, FangX, TongZ, . Effect of laser shock peening on aluminium alloy laser-welds. Surf Eng. 2016;32(12):943–948.
ShahzadA, ZadorozhnyyVY, PavlovMD, . Deposition of the Ti-Al coatings on different metallic substrates by mechanical alloying and subsequent laser treatment. J Alloy Compd. 2018;731:1295–1302.
14.
ZadorozhnyyVY, ShahzadA, PavlovMD, . Synthesis of the Ni–Al coatings on different metallic substrates by mechanical alloying and subsequent laser treatment. J Alloy Compd. 2017;707:351–357.
15.
RajamureRS, VoraHD, GuptaN, . Laser surface alloying of molybdenum on aluminum for enhanced wear resistance. Surf Coat Technol. 2014;258:337–342.
16.
LeeIS, KaoPW, ChangCP, . Formation of Al–Mo intermetallic particle-strengthened aluminum alloys by friction stir processing. Intermetallics. 2013;35:9–14.
17.
AlmeidaA, CarvalhoF, CarvalhoPA, . Laser developed Al–Mo surface alloys: Microstructure, mechanical and wear behaviour. Surf Coat Technol. 2006;200(16–17):4782–4790.
18.
LiC, WangH, DingJ, . Effects of heat treatment on HVOF-sprayed Fe-based amorphous coatings. Surf Eng. 2020;37(5):590–598.
19.
PishvaP, SalehiM, GolozarMA.Effect of grinding on surface characteristics of HVOF-sprayed WC–10Co–4Cr coatings. Surf Eng. 2019;36(11):1180–1189.
20.
GamutanJ, MikiT.Surface modification of a Mo-substrate to form an oxidation-resistant MoSi2 layer using a Si-saturated tin bath. Surf Coat Technol. 2022;448:128938.
21.
PawlowskiL, FauchaisP.Thermal transport properties of thermally sprayed coatings. Int Mater Rev. 1992;37(1):271–289.
22.
SinghS, SinghH, BudduRK.Microstructural investigations on bonding mechanisms of cold-sprayed copper with SS316L steel. Surf Eng. 2019;36(10):1067–1080.
23.
PanJ, HuS, NiuA, . Numerical analysis of particle impacting and bonding processes during high velocity oxygen fuel spraying process. Appl Surf Sci. 2016;366:187–192.
24.
EumannM, SauthoffG, PalmM.Re-evaluation of phase equilibria in the Al–Mo system. Int J Mater Res. 2006;97:1502–1511.
