| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Fatigue and Fracture III
|
| Presentation Title |
Fatigue Life Prediction of Additively Manufactured IN718 Using Crystal Plasticity Modeling with Experimental Validation |
| Author(s) |
Veerappan Prithivirajan, Michael D Sangid |
| On-Site Speaker (Planned) |
Veerappan Prithivirajan |
| Abstract Scope |
The inherent defects such as porosity associated with materials produced by selective laser melting (SLM) limits their usage in safety-critical applications. In this work, the fatigue behavior of a Ni- based super alloy, Inconel 718 (IN 718), produced by SLM is studied using crystal plasticity finite element (CP-FE) simulations and experimental tools such as electron backscatter diffraction (EBSD), high energy x-ray diffraction microscopy (HEDM), and synchrotron-based X-ray micro-computed tomography. Multiple factors such as grain sizes and orientations, neighbor interactions, twins, pore size and pore interactions influence the fatigue behavior of these materials which could be captured using the CP-FE simulations. In this study, a fatigue life prediction model is developed based on the micromechanical fields obtained from the CP-FE simulations. The life model is used to obtain the fatigue life scatter of multiple 3D synthetic microstructures (created from EBSD data), and is subsequently validated with the experimental test results. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |