Study on CO2 Laser Welding of AZ31 Magnesium Alloy Sheet Produced by Strip Casting Process

Jun Wei Zhang; Xiao Dong Hu; Dan Zhang

doi:10.4028/www.scientific.net/AMR.228-229.1012

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 228-229Study on CO2 Laser Welding of AZ31 Magnesium Alloy...

Study on CO₂ Laser Welding of AZ31 Magnesium Alloy Sheet Produced by Strip Casting Process

Abstract:

Strip casting process is a kind of promising near net shape technology for producing magnesium alloys strip. The microstructure and mechanical properties of CO2 laser welded as-cast AZ31 magnesium alloy sheet were investigated. The microstructure of base material (BS) was typical columnar dendritic structure. A significant grain refinement occurred in the fusion zone (FZ) due to the rapid cooling, while an obvious grain coarsening occurred in the heat affected zone (HAZ). The tensile strength and elongation at fracture of weld joints were reduced due to the weld depression caused by high heat input. The hardness in the FZ was the highest due to fine grains, while there was a decrease in hardness of the HAZ, but little variation compared with the hardness of the BS.

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Periodical:

Advanced Materials Research (Volumes 228-229)

Pages:

1012-1016

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.228-229.1012

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Online since:

April 2011

Authors:

Jun Wei Zhang, Xiao Dong Hu, Dan Zhang

Keywords:

Laser Welding, Magnesium Alloy, Strip Casting

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