Majumdar, J. Dutta ; Galun, R. ; Mordike, B. L. ; Chandra, B. Ramesh ; Manna, I. (2006) Laser composite surfacing of a magnesium alloy with chromium carbide Lasers in Engineering, 16 (5-6). pp. 349-359. ISSN 0898-1507
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Abstract
The present study concerns improving the wear resistance of a Mg alloy (MEZ) by melting the surface with a high power laser and simultaneously injecting hard particles, of Cr2C3 +(25mm -40mm) into the surface. The laser processing was carried out using a continuous wave CO2 laser, Model: Rofin Sinar, RS 10000, with a beam diameter of 4 mm and a focal point 30 mm above the surface. Following laser processing, a detailed investigation of the microstructures, compositions and phases were undertaken and mechanical (wear resistance) and electrochemical (pitting corrosion resistance) properties of the surface layer were evaluated in details. The microstructure of the surface layer consists of uniformly dispersed Cr2C3 precipitates in grain-refined matrix. The micro-hardness and wear resistance of the surface layer were significantly improved as compared to the base metal.
Item Type: | Article |
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Source: | Copyright of this article belongs to Old City Publishing, Inc.. |
Keywords: | Magnesium; Chromium Carbide; Micro-hardness; Wear; Corrosion |
ID Code: | 18872 |
Deposited On: | 17 Nov 2010 12:29 |
Last Modified: | 17 May 2016 03:31 |
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