Abstract
Primary solidification of ternary compounds Al20Mn2Ce and Al10Mn2Ce were analyzed through the coupling of the thermodynamic modeling and classic nucleation theory. Thermodynamic models of Al20Mn2Ce and Al10Mn2Ce were developed using the CALPHAD approach based on first-principles calculated enthalpy of formation and experimental data obtained from this work and the literature. The analysis suggested that despite the larger thermodynamic driving force for nucleation of Al10Mn2Ce, nucleation is preferred for the Al20Mn2Ce phase in the highly undercooled liquid due to its smaller interfacial energy. Therefore, manufacturing methods with rapid cooling rates will favor primary solidification of Al20Mn2Ce for Al-rich Al–Ce–Mn alloys.
| Original language | English |
|---|---|
| Article number | 156048 |
| Journal | Journal of Alloys and Compounds |
| Volume | 844 |
| DOIs | |
| State | Published - Dec 5 2020 |
Funding
YY would like to thank Cecil Carmichael to cast the alloy. Research was performed at the U.S. Department of Energy's Manufacturing Demonstration Facility, located at Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. Research was co-sponsored the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office and Vehicle Technologies Office Propulsion Materials Program. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (<http://energy.gov/downloads/doe-public-access-plan>). YY would like to thank Cecil Carmichael to cast the alloy. Research was performed at the U.S. Department of Energy’s Manufacturing Demonstration Facility, located at Oak Ridge National Laboratory. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. Research was co-sponsored the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy , Advanced Manufacturing Office and Vehicle Technologies Office Propulsion Materials Program .
Keywords
- Al-Mn-Ce alloys
- Nucleation
- Primary solidfication
- Thermodynamics