About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Cast Shop Technology
|
Presentation Title |
Small Scale Oxidation Experiments on AlMg Alloys in Various Gas Fired Furnace Atmospheres |
Author(s) |
Anders Johansson, Egil Solberg, Magnus Skramstad, Thomas Kvande, Johannes Lodin, Nicholas A. Smith-Hanssen, Martin Syvertsen, Anne Kvithyld |
On-Site Speaker (Planned) |
Nicholas A. Smith-Hanssen |
Abstract Scope |
Oxidation is of great interest in the cast house, as oxidation equates to metal loss. Therefore, a method to study the oxidation in a casthouse was developed and tested on AlMg alloys and AlMg alloys with beryllium additions under a variety of atmospheres created by an airfuel or oxyfuel burners. Samples of around 65 grams with between 0 and 5 % Mg were placed in small steel or ceramic crucibles and further placed in a gas-fired box furnace for times between 10 min and 6 hours.
The sample mass was recorded after cooling to quantify the oxidation extent with respect to both alloy and atmosphere. Microscopic analysis of selected samples showed that a MgAl2O4 layer had formed on the surface and that at higher Mg contents internal oxidation occurred resulting in the formation of MgO or MgAl2O4 clusters in the melt. The results show promise for a method to give an increased understanding of the oxidation in the casthouse. |
Proceedings Inclusion? |
Planned: Light Metals |