About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Additive Manufacturing: Materials Design and Alloy Development VII – Design With Multi-Modal and Field Data by Integrating Uncertainty
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| Presentation Title |
Towards a Multiscale Model for Fatigue in Additively Manufactured Polycrystalline Materials |
| Author(s) |
Somnath Ghosh, Lucas Lucas Prata Ferreira, Nolan Strauss, Isabella Snyder, Anthony Rollett |
| On-Site Speaker (Planned) |
Somnath Ghosh |
| Abstract Scope |
Predicting fatigue life in additively manufactured parts with location-dependent material microstructures and properties is a challenging undertaking. This talk will discuss a multiscale modeling and life prediction platform for LPBF-based Ti-6Al-4V and IN718 alloys that is being developed in the NASA STRI IMQCAM. Specifically, the development of a highly efficient parametrically-upscaled constitutive model (PUCM) and fatigue crack model will be addressed. It bridges length scales through the explicit representation of statistical functions of morphological and crystallographic descriptors of the microstructure and defects in the form of representative aggregated microstructural parameters (RAMPs) in PUCM constitutive coefficients. Image-based microstructural crystal plasticity-phase field models of deformation and fatigue crack growth are first developed to create a microstructure response database (MRDB). Machine learning tools subsequently operate on the MRDB to generate PUCM parameters as explicit functions of RAMPs. The model will explore the role of defects and microstructure on part-level damage evolution. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, ICME, Computational Materials Science & Engineering |