| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development III -- Super Materials and Extreme Environments
|
| Presentation Title |
Solidification Condition and Its Effects on Microstructure in Metal-power Bed Fusion Processes |
| Author(s) |
Yuichiro Koizumi |
| On-Site Speaker (Planned) |
Yuichiro Koizumi |
| Abstract Scope |
The solidification in Powder Bed Fusion (PBF) type additive manufacturing (AM) leads to material properties different from those obtained by conventional processes. We have examined the relationship between the solidification condition and grain structures in the PBF process by combining experiments and computer simulations. We found that equiaxed grains are formed even when columnar grains are expected according to the conventional columnar-equiaxed transition theory when the fluid velocity in melt-pools is as high as hundreds of mm/s. Phase-field simulations suggested that the solute segregation becomes more significant with increasing cooling rate. These findings are essential for developing new alloys suitable for AM. Reference: [1] Zhao et al. Additive Manufacturing 2019;26:202. [2] Sun et al. Acta Materialia 2015;86:305. [3] Wei et al. Additive Manufacturing 2018;24:103. [4] Ueki et al. Metals 2020;10:71. [5] Ding et al. Materials Science & Engineering A 2019;764:138058. [6] Sun et al. Additive Manufacturing 2018;23:457. |
| Proceedings Inclusion? |
Planned: |