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Effect of Sn addition on microstructure, mechanical and casting properties of AZ91 alloy
Highlights ► Refinement of Mg17Al12 phase took place as Sn was added into the AZ91 alloy. ► Up to 47% increase in strength was achieved by 0.5wt.% Sn addition to AZ91 alloy. ► Melt fluidity increased with 0.5wt.% Sn content then decreased rapidly. ► Hot tear susceptibility decreased with 0.5wt.% Sn addition above which it increased.
Abstract In this study, effect of Sn addition on microstructure, mechanical and the casting properties of AZ91 magnesium alloy have been studied. Results from the microstructural analysis showed that refinement of Mg17Al12 phase took place and new Mg2Sn phase was formed as Sn was added into the AZ91 alloy. Fluidity increased with 0.5wt.% Sn content then decreases rapidly as the Sn content exceeded above 0.5wt.%. Hot tear susceptibility (HTS) decreased with 0.5wt.% Sn addition to AZ91 magnesium alloy above which it increased considerably. Tensile strength and elongation increased by addition of up to 0.5wt.% Sn above which it decreased with increasing Sn content. The increase of mechanical properties was attributed to transformation of lamellar to fully divorced eutectic β phases by 0.5wt.% Sn addition existed in grain boundaries of the magnesium matrix. The reduction in the mechanical properties above 0.5wt.% Sn was attributed to formation of clustered Mg2Sn phase.
Effect of Sn addition on microstructure, mechanical and casting properties of AZ91 alloy
Highlights ► Refinement of Mg17Al12 phase took place as Sn was added into the AZ91 alloy. ► Up to 47% increase in strength was achieved by 0.5wt.% Sn addition to AZ91 alloy. ► Melt fluidity increased with 0.5wt.% Sn content then decreased rapidly. ► Hot tear susceptibility decreased with 0.5wt.% Sn addition above which it increased.
Abstract In this study, effect of Sn addition on microstructure, mechanical and the casting properties of AZ91 magnesium alloy have been studied. Results from the microstructural analysis showed that refinement of Mg17Al12 phase took place and new Mg2Sn phase was formed as Sn was added into the AZ91 alloy. Fluidity increased with 0.5wt.% Sn content then decreases rapidly as the Sn content exceeded above 0.5wt.%. Hot tear susceptibility (HTS) decreased with 0.5wt.% Sn addition to AZ91 magnesium alloy above which it increased considerably. Tensile strength and elongation increased by addition of up to 0.5wt.% Sn above which it decreased with increasing Sn content. The increase of mechanical properties was attributed to transformation of lamellar to fully divorced eutectic β phases by 0.5wt.% Sn addition existed in grain boundaries of the magnesium matrix. The reduction in the mechanical properties above 0.5wt.% Sn was attributed to formation of clustered Mg2Sn phase.
Effect of Sn addition on microstructure, mechanical and casting properties of AZ91 alloy
Turen, Yunus (author)
2013-02-12
7 pages
Article (Journal)
Electronic Resource
English
Effect of Sn addition on microstructure, mechanical and casting properties of AZ91 alloy
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