About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
F-16: Experimental Investigation of MgAl2O4 Spinel Formation in Oxidation of Al-Mg Alloys |
Author(s) |
Young-Ok Yoon, Seong-Ho Ha, Bong-Hwan Kim, Hyun-Kyu Lim, Shae K. Kim |
On-Site Speaker (Planned) |
Young-Ok Yoon |
Abstract Scope |
Al-Mg alloys are active when they are exposed to oxygen at elevated temperature. Al alloys in the range from 1 to 4mass%Mg are widely used in industry. Oxide layer of Al-Mg alloys is characterized by MgO and MgAl2O4 spinel. At elevated temperatures, the alloys containing low Mg content form mainly MgAl2O4 spinel on the surface. Further increase of Mg content leads to MgO formation followed by MgAl2O4 spinel. The formation of the MgO outmost layer takes place by the surface segregation of Mg in the initial oxidation. After that, the oxidation is proceeded with MgAl2O4 spinel beneath the MgO. Growth of the oxide layer is promoted by constant formation of MgAl2O4 spinel. The aim of this study is to experimentally investigate the formation of MgAl2O4 spinel in oxidation of Al-Mg alloys containing a wide range of Mg content based on phase diagrams with oxygen partial pressure. |
Proceedings Inclusion? |
Planned: Light Metals |