The Metastable Phase Responsible for Hardenig in an Al-Mg Alloy Aged at 473K

Koichiro Fukui; Ayaka Mori; Masanori Mitome; Mahoto Takeda

doi:10.4028/www.scientific.net/AMR.748.123

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The Metastable Phase Responsible for Hardenig in an Al-Mg Alloy Aged at 473K
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 748The Metastable Phase Responsible for Hardenig in...

The Metastable Phase Responsible for Hardenig in an Al-Mg Alloy Aged at 473K

Abstract:

The present work investigated precipitation behavior in an Al-17at%Mg alloy isothermally aged at 473K, by means of Vickers microhardness tests, DSC measurements and TEM observations. A quantitative analysis of DSC measurements revealed that the metastable β-phase precipitates mainly contribute to precipitation hardening of this alloy aged at 473K. The present STEM-EDX observations confirmed that the metastable β-phase precipitate has a layer structure with a composition similar to the stable phase (Al₃Mg₂)_.