|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Microstructure Simulation for Solidification of Magnesium–Zinc–Yttrium Alloy by Multi-phase-field Method Coupled with CALPHAD Database
| Title: | Microstructure Simulation for Solidification of Magnesium–Zinc–Yttrium Alloy by Multi-phase-field Method Coupled with CALPHAD Database |
| Authors: | Minamoto, Satoshi Browse this author | | Nomoto, Sukeharu Browse this author | | Hamaya, Atsushi Browse this author | | Horiuchi, Toshiaki Browse this author | | Miura, Seiji Browse this author →KAKEN DB |
| Keywords: | magnesium alloy | | CALPHAD | | solidification | | phase field method |
| Issue Date: | 15-Dec-2010 |
| Publisher: | Iron and Steel Institute of Japan |
| Journal Title: | ISIJ International |
| Volume: | 50 |
| Issue: | 12 |
| Start Page: | 1914 |
| End Page: | 1919 |
| Publisher DOI: | 10.2355/isijinternational.50.1914 |
| Abstract: | The Mg–Zn–Y alloys show a good mechanical strength which can be achieved with the precipitation hardening by intermediate phases (X, W and I phase) in Mg solid solution (α phase). However, an accurate control of the microstructure formation is required in order to obtain good mechanical properties. In this study, experimental observations of microstructures of the Mg–Zn–Y system have been performed. Then we have focused on developing CALPHAD (CALculation of PHAse Diagrams) thermodynamic database to obtain the Gibbs free energy to draw phase diagram of the system and to understand the precipitation behavior of the intermediate phases. In order to understand the formation of microstructures, we have performed simulations of solidification of the alloy with use of multi-phase-field method. At the beginning the solidification process has been calculated for a large area, then the zoomed in region of the lamellar structures of the α phase and the W phase have been analyzed. Resulting optimum lamellar spacing reproduce experimental one well. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/75175 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 三浦 誠司
|
