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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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 33; pp. 607 - 611
Main Authors Shen, Lai Di, Li, Ren Xing, Li, Xing Cheng, Chen, Ju Fang
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.10.2010
Subjects
Laser Surface Melting
Magnesium Alloy
Friction
Wear Behaviour
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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.
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