Influence of Laser Surface Melting on Wear Resistance of AZ91D Magnesium Alloy
In the present study, an attempt has been made to improve the surface hardness and wear resistance of magnesium alloy AZ91D by laser surface melting (LSM) with a 2kW continuous wave CO2 laser. The microstructure of the laser surface melted zone consists of fine dendrites with an average grain size o...
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Published in | Applied Mechanics and Materials Vol. 33; pp. 607 - 611 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Zurich
Trans Tech Publications Ltd
01.10.2010
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Subjects | |
Online Access | Get full text |
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Summary: | In the present study, an attempt has been made to improve the surface hardness and wear resistance of magnesium alloy AZ91D by laser surface melting (LSM) with a 2kW continuous wave CO2 laser. The microstructure of the laser surface melted zone consists of fine dendrites with an average grain size of less than 10μm. Micro hardness of the melted zone was improved to 70-85HV as compared to 53HV of the substrate. The wear behavior of the laser surface melted layer was investigated using a ball-on-flat apparatus under dry sliding condition. Compared with the as-received AZ91D, the wear volume of the laser surface melted layer was decreased by 51%, the wear resistance of the laser surface melted layer was improved significantly. |
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Bibliography: | Selected, peer reviewed papers from the 2nd International Conference on Functional Manufacturing Technologies (ICFMT 2010), Aug.6-9 2010, Harbin, Heilongjiang, China |
ISBN: | 0878492364 9780878492367 |
ISSN: | 1660-9336 1662-7482 1662-7482 |
DOI: | 10.4028/www.scientific.net/AMM.33.607 |