Morphology and Thermal Stability of Metastable Precipitates Formed in an Al-Mg Alloy Aged at 373K and 473K

Koichiro Fukui; Ryota Watanabe; Mahoto Takeda

doi:10.4028/www.scientific.net/AMM.799-800.212

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Morphology and Thermal Stability of Metastable Precipitates Formed in an Al-Mg Alloy Aged at 373K and 473K
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 799-800Morphology and Thermal Stability of Metastable...

Morphology and Thermal Stability of Metastable Precipitates Formed in an Al-Mg Alloy Aged at 373K and 473K

Abstract:

The present work has investigated precipitation behavior in an Al-17at%Mg alloy isothermally aged at 373K and 473K, by means of Vickers micro-hardness tests, DSC measurements and TEM observations. The present DSC measurements have revealed that the metastable β′-phase precipitates mainly contributed to precipitation hardening of this alloy in isothermal aging at 373K and 473K. The TEM observations have confirmed that the β ' phase precipitates were formed in the {001} planes of Al matrices in platelet shapes.