| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Micromechanical Modeling of Porosity Defects in Additively Manufactured Alloys |
| Author(s) |
Krzysztof S. Stopka, Michael Sangid |
| On-Site Speaker (Planned) |
Krzysztof S. Stopka |
| Abstract Scope |
Additively manufactured (AM) components can offer substantial manufacturing cost and time savings. However, much work remains to develop industry standards for the rapid qualification of AM components for use in fatigue-critical applications. Internal defects are of high concern because they cannot be remedied as easily as other imperfections (e.g., surface roughness by grinding or polishing, residual stresses by heat treatment, etc.). Structural defects produced by laser powder bed fusion (LPBF) may include lack of fusion, gas porosity, and linear pore alignment. In this work, the stress and strain fields around these key defects are investigated using micromechanical crystal plasticity simulations of Ni-base superalloy IN718 in the low cycle fatigue (LCF) regime. The results will aid in the development of a standard for the rapid qualification of AM components alongside future experimental studies and reduced-order modeling. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Composites |