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Enhanced ductility and strength in a cast Al–Mg alloy with high Mg content.
- Source :
-
Materials Science & Engineering: A . Mar2021, Vol. 806, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- Cast Al–Mg alloys with high Mg content have attracted considerable interest as a result of exceptionally low mass density and enhanced Mg solid-solution strengthening effect. However, poor ductility in this class of cast Al–Mg alloys originating from the increased amount of brittle Al 3 Mg 2 phase presents a challenge. This work aims to improve ductility of a cast Al-10 wt%Mg alloy by prolonging time and/or increasing temperature during solid-solution treatment, hence minimizing the amount of the Al 3 Mg 2 phase. The amounts of Al 3 Mg 2 decrease and the concentrations of solute Mg increase with prolonging time and/or increasing temperature, improving both ductility and strength. Solid-solution treatment at 425 °C for 9 h or at 438 °C for 3 h induces complete dissolution of the Al 3 Mg 2 phase, achieving an average uniform elongation of ~27% accompanied by an average 0.2% offset yield strength of ~186 MPa. The mechanisms improving both ductility and strength are discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *DUCTILITY
*MAGNESIUM alloys
*ALLOYS
*ALUMINUM alloys
Subjects
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 806
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 148806190
- Full Text :
- https://doi.org/10.1016/j.msea.2021.140806