DETERMINATION OF THE THIXOCASTING TEMPERATURES OF AZ91D AND OTHER Mg ALLOYS USING A QUENCHING METHOD

Giguère, Nicolas; Amira, S.; Tremblay, R.; Loong, C.A.; Dubé, D.

doi:10.1179/cmq.2008.47.2.163

Cited by 2 publications

(1 citation statement)

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“…where T L is the liquidus temperature of the alloy and is taken as 868 K [7]. As there are no values in the literature with which to compare these density values, an approximation of the atomic volume of metallic mixtures is used.…”

Section: Resultsmentioning

confidence: 99%

Physical Properties of AZ91D Measured Using the Draining Crucible Method: Effect of SF6

Roach

Henein

2012

Int J Thermophys

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The draining crucible (DC) technique was used for measurements on AZ91D under Ar and SF 6 . The DC technique is a new method developed to simultaneously measure the physical properties of fluids, the density, surface tension, and viscosity. Based on the relationship between the height of a metal in a crucible and the outgoing flow rate, a multi-variable regression is used to calculate the values of these fluid properties. Experiments performed with AZ91D at temperatures from 923 K to 1173 K indicate that under argon, the surface tension (N · m −1 ) and density (kg · m −3 ) are [0.63 − 2.13 × 10 −4 (T − T L )] and [1656 − 0.158(T − T L )], respectively. The viscosity (Pa · s) has been determined to be [1.455 × 10 −3 − 1.209 × 10 −5 (T − T L )] over the temperature range from 921 K to 967 K superheat. Above 967 K, the viscosity of the alloy under argon seems to be constant at (2.66 × 10 −4 ± 8.67 × 10 −5 ) Pa · s. SF 6 reduces the surface tension of AZ91D.

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Section: Resultsmentioning

confidence: 99%