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Effect of laser surface treatment on microstructure and properties of MRI 230D Mg alloy

Mondal, AK and Kumar, S and Blawert, C and Dahotre, NB (2007) Effect of laser surface treatment on microstructure and properties of MRI 230D Mg alloy. In: 5th International Conference on Processing and Manufacturing of Advanced Materials, JUL 04-08, 2006, Vancouver.

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Official URL: http://www.scientific.net/MSF.539-543.1153

Abstract

A creep resistant Mg alloy MRI 230D was subjected to laser surface treatment using Nd:YAG laser equipped with a fiber optics beam delivery system in argon atmosphere. The laser surface treatment produced a fine dendritic microstructure and this treatment was beneficial for the corrosion and wear resistance of the alloy. Long-term linear polarisation resistance and Electrochemical Impedance Spectroscopy measurements confirmed that the polarisation resistance values of laser treated material were twice as high as that for the untreated material. This improved behaviour was due to the finer and more homogenous microstructure of the laser treated surface. The laser treatment also increased surface hardness two times and reduced the wear rate by 25% due to grain refinement and solid solution strengthening.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Trans Tech Publications Inc.
Department/Centre: Others
Date Deposited: 25 Mar 2010 07:11
Last Modified: 25 Mar 2010 07:11
URI: http://eprints.iisc.ernet.in/id/eprint/26374

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