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A Study on the Mechanical Properties of Spray-cast Al 6061 Alloy with Variation of Mg/Si Content  

Lee, Jae-Sung (Division of Material Science & Engineering, Inha University)
Kim, Myung-Ho (Division of Material Science & Engineering, Inha University)
Publication Information
Journal of Korea Foundry Society / v.28, no.4, 2008 , pp. 179-183 More about this Journal
Abstract
Mechanical properties of the spray-cast Al 6061 alloy with variation of Mg/Si addition were investigated. After spray-cast, hot extrusion was performed at $460^{\circ}C$ then followed ageing treatment to the T6 condition. SEM, EDX, and XRD were used to characterize a ${\beta}(Mg_{2}Si)$ precipitate. The amount of ${\beta}$ precipitate was calculated from the XRD measurements. Hardness, ultimate tensile strength and elongation were tested then compared with those of the Al 6061 alloys made by ingot metallurgy (I/M) and powder metallurgy (P/M). The ultimate tensile strength and elongation of the spray-cast Al 6061 alloy were 318MPa and 16.5%, respectively. These properties were improved in the 2.2 wt%Mg and 1.3wt%Si addition up to 349MPa of UTS and 12.5% of elongation, mainly due to increased amount of a fine supersaturated ${\beta}(Mg_{2}Si)$ precipitate.
Keywords
Spray-cast; Supersaturation; Al 6061; $Mg_{2}Si$; Mechanical properties;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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