| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Micromechanical Modeling Driven Design of Fatigue Resistant Metal Additive Manufacturing Solutions |
| Author(s) |
Anssi Laukkanen, Matti Lindroos, Tatu Pinomaa, Tom Andersson, Tomi Suhonen |
| On-Site Speaker (Planned) |
Anssi Laukkanen |
| Abstract Scope |
Arguably the most critical performance dominating metal additive manufacturing (AM) materials and parts is their resistance to fatigue. We present an integrated computational materials engineering (ICME) methodology where the driver for establishing and designing the fatigue performance of AM solutions is micromechanical evaluation of fatigue. The approach is based on explicitly assessing fatigue critical material features at the microstructural scale, such as inclusions, porosity, surface roughness and followingly evaluating plastic slip to fatigue damage interactions. To support ICME workflows we include defect formation and rapid solidification simulations at powder bed scale, which provides the possibility to address fatigue resistance over the process-structure-properties-performance chain. The computational means are demonstrated with use cases consisting of maraging steels, high entropy and nickel based alloys. The results provide insights how ICME driven approaches can be used to design better fatigue resistant AM solutions and reliably control their respective properties in critical high end applications. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |