About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Architected Structures and Multifunctional Metamaterials
|
| Presentation Title |
Understanding and Modeling the Effect of Thermal History on the
Structure and Functional Properties of TPMS Lattices Fabricated by Laser Powder Bed Fusion |
| Author(s) |
Hunter Goddard, Mihir Darji, Kunal Gide, Shaghayegh Bagheri, Prahalada K. Rao |
| On-Site Speaker (Planned) |
Prahalada K. Rao |
| Abstract Scope |
Laser powder bed fusion (LPBF) enables manufacturing of complex TPMS lattices. However, achieving consistent surface and geometric integrity remains a fundamental challenge. These build flaws are strongly governed by the spatiotemporal temperature distribution, called thermal history, induced in the part during fabrication. Despite its importance, the causal influence of thermal history on the functional performance of LPBF-fabricated TPMS lattices remains poorly understood, largely due to the computational expense of resolving thin-wall lattice features using conventional finite element thermal models. Accordingly, the objective of this work is to predict the effect of the lattice topology (design) and process conditions on thermal history of LPBF-processed TPMS lattices, and subsequently, correlate the thermal history to part quality in terms of surface integrity and geometric deviation. To realize this objective, we present a mesh-free, graph-based computational modeling framework to predict the part-level thermal history of LPBF-processed Inconel 718 TPMS lattices. |