The Effect of Extended Time Aging on the Mechanical Properties of Vertical Vacuum Cast Aluminum-Manganese and Aluminum-Rare Earth Magnesium Alloys

Basner, Timothy G.; Evans, Mike; Sakkinen, Daniel J.

doi:10.4271/930419

Cited by 7 publications

(1 citation statement)

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“…As a result, the casting processing and geometric parameters may have an overriding influence in the final mechanical properties [1,2,8]. A large number of studies have been carried out in AM series alloys aimed at assessing the effect of Al content [9][10][11], section thickness and casting shape, as well as assessing the effects of the skin [1,2,5,7,8,12] and the porosity level [13,14] on the tensile behavior. However, detailed systematic studies of the effect of solute content on the binary Mg-Al system are lacking, even though most of the commercial alloys are based on this alloy system.…”

Section: Introductionmentioning

confidence: 99%

Solute Content and the Tensile Behavior of High Pressure Die Cast Mg-Al Alloys

Nagasekhar

Cáceres

2007

MSF

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Binary Mg-Al alloys with varying content of aluminium from 0.5 to 12mass% have been studied. The proof stress increase in two steps whereas the ductility exhibits two correlated stepwise drops, as the aluminium content increases. The first increase in strength, and attendant drop in ductility, is observed between 4 and 5 mass% Al. The second stepwise change is observed between 10 and 12 mass% Al. These effects are connected with well defined changes in the microstructure: at 4 mass% a dispersion of β-phase intermetallic particles appears in the core region and a closed cell structure develops near the surface; at 12 mass% Al, the increased volume fraction of the β- phase intermetallics extends the interconnected network of intermetallics to include the core region as well. The micromechanics of the strengthening and decreased ductility are discussed.

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