| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Applications III
|
| Presentation Title |
Combining Modelling and Microstructural Studies in Explaining the Laser Parameter Effect on Superalloy Cracking during Selective Laser Melting |
| Author(s) |
Marcus Chunwai Lam |
| On-Site Speaker (Planned) |
Marcus Chunwai Lam |
| Abstract Scope |
High-strength Ni-based superalloys such as IN738LC is known to be difficult for Selective Laser Melting (SLM) due to their high crack susceptibility. Although previous parametric studies on IN738LC and similar alloys indicated the SLM laser parameter as an important factor, the underlying mechanisms are not clear. In this presentation, we are reporting a research on the laser parameter effects utilizing a high-fidelity SLM model incorporating computational fluid dynamic (CFD), finite element analysis (FEA) and the calculation of phase diagram (CALPHAD). Some of the SLM physics involved in the CFD model are phase transformation, boiling, molten liquid flow etc. The thermal field from CFD was processed by FEA to investigate the thermal stress effect. The defects and microstructure were also studied to compare with the models. The result indicates that the laser parameter effect on cracking is originated from interrelated factors such as solidification conditions, thermal stress, and grain structure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Modeling and Simulation |