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Laser Surface Alloying of Copper, Manganese, and Magnesium with Pure Aluminum Substrate

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Abstract

Laser surface alloying is one of the recent technologies used in the manufacturing sector for improving the surface properties of the metals. Light weight materials like aluminum alloys, titanium alloys, and magnesium alloys are used in the locomotive, aerospace, and structural applications. In the present work, an experimental study was conducted to improve the surface hardness of commercially pure aluminum plate. CO2 laser is used to melt pre-placed powders of pure copper, manganese, and magnesium. Microstructure of alloyed surface was analyzed using optical microscope. The best surface alloying was obtained at the optimum values of laser parameters, viz., laser power, scan speed, and laser beam diameter. In the alloyed region, microhardness increased from 30 HV0.5 to 430 HV0.5, while it was 60 HV0.5 in the heat-affected region. Tensile tests revealed some reduction in the strength and total elongation due to alloying. On the other hand, corrosion resistance improved.

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Acknowledgment

The authors acknowledge the facilities procured under Department of Science and Technology FIST Project Number: SR/FST/ETI-244/2008. The authors also acknowledge their access to XRD Xpert facility procured under Ministry of Steels sponsored Project Number ME/P/SKJ/04.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781 039, India

    Woldetinsay G. Jiru, M. Ravi Sankar & Uday S. Dixit

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  1. Woldetinsay G. Jiru
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  2. M. Ravi Sankar
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  3. Uday S. Dixit
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Correspondence to Uday S. Dixit.

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Jiru, W.G., Sankar, M.R. & Dixit, U.S. Laser Surface Alloying of Copper, Manganese, and Magnesium with Pure Aluminum Substrate. J. of Materi Eng and Perform 25, 1172–1181 (2016). https://doi.org/10.1007/s11665-016-1922-x

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  • DOI: https://doi.org/10.1007/s11665-016-1922-x

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