| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Compositional Redistribution, Phase Transformation, Microstructural Development in SS316L/IN718 Bimetallic Structure Fabricated by Laser Powder Bed Fusion |
| Author(s) |
Asif Mahmud, Nicolas Ayers, Thinh Huynh, Kevin Graydon, Yongho Sohn |
| On-Site Speaker (Planned) |
Asif Mahmud |
| Abstract Scope |
This work reports on compositional intermixing, phase transformations, microstructural development in SS316L/IN718 bimetallic structure fabricated by laser powder bed fusion (LPBF). Fully dense and crack free SS316L/IN718 bimetallic structures (cylinders with a diameter of 10 mm, height of 12 mm and support structure 4 mm) were produced using a laser power of 200 W, laser scan speed of 800 mm/s, hatch spacing of 0.12 mm and slice thickness of 0.03 mm. The XRD pattern revealed the dominant presence of austenitic (FCC) phase. Cross-sectional microstructure near the interface of the SS316L/IN718 bimetallic structure consisted of typical cellular/columnar structure. Intermixing of primary solvents, Ni and Fe was observed for approximately 200 µm in distance, and their intermixing rate was estimated to be in the order of 10-3 m2/s based on the effective time assumption of 1.0 ms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Phase Transformations |