| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Light Metal Technology
|
| Presentation Title |
Investigation on the Grain Refinement of Mg-Al Alloys by Superheating Process Using Rapid Solidification Process |
| Author(s) |
Sungsu Jung, Yongho Park, Youngcheol Lee |
| On-Site Speaker (Planned) |
Sungsu Jung |
| Abstract Scope |
Superheating process is a relatively simple method of controlling only the temperature of the metal without adding nucleants or refining agents. In previous studies, it has been reported that the nuclei for α-Mg grains are generated through the superheating process, but the definitive analysis of the potential nuclei has not been accomplished yet. In this study, the rapid solidification process was used to identify nuclei for α-Mg grains produced through the superheating process. Through the superheating process, the Al8Mn5 particles were transformed into metastable Al10Mn3 particles, and it was thought that Al10Mn3 promotes the grain formation of Mg-Al alloys during the solidification process. This study presents a new possibility that the phase transformation of Al-Mn particles may be the cause of grain refinement of Mg-Al alloys induced by the superheating process. Additional research is underway to analyze the crystallographic mismatching between magnesium and these particles. |