| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cast Shop Technology
|
| Presentation Title |
Heat Treatment of Mg-containing Aluminum Alloys 5182 and 6016 in an Oxidizing Atmosphere with 4 % CO<sub>2</sub> |
| Author(s) |
Cathrine K. W. Solem, Per Erik Vullum, Gabriella Tranell, Ragnhild Aune |
| On-Site Speaker (Planned) |
Cathrine K. W. Solem |
| Abstract Scope |
Oxidation of aluminum (Al) during production is a widely known problem, and magnesium (Mg) as a typical alloying element increases the oxidation rate with increasing content. It has been established that small additions of CO<sub>2</sub> (≥ 4%) in an oxidizing atmosphere have significant inhibiting effect on the oxidation rate of AA5182 (AlMg4.5Mn0.4) and AA6016 (AlSi1.2Mg0.4) discs in the view of oxide layer thickness and mass gain when heat treated at 750°C for 7h. The phases present in each alloy have now been identified and compared with discs heated in synthetic air and argon under the same experimental conditions. The XRD analyses revealed the presence of MgO and MgAl<sub>2</sub>O<sub>4</sub> for all discs, and Mg<sub>2</sub>C<sub>3</sub> for the 5182 alloy when heated in the CO<sub>2</sub> gas mixture. The CO<sub>2</sub>-mixture also resulted in a nanometer-thin amorphous C-layer retarding the evaporation of Mg and inhibiting the oxidation rate for both alloys. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Other, |