| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Modeling Hot Cracking in Metal Additive Manufacturing |
| Author(s) |
Eric Clough, Brennan Yahata, Mark O'Masta, Hunter Martin, Matthew Begley |
| On-Site Speaker (Planned) |
Eric Clough |
| Abstract Scope |
Hot cracking in metals occurs when liquid films, present at grain boundaries in the final stages of solidification, cavitate to accommodate thermal and solidification shrinkage. The initiation and growth of these hot cracks is a complex phenomenon dictated by the interaction between geometric, thermal, mechanical, and alloy solidification factors. Despite significant advancements in the understanding of hot cracking over the past >80 years, the phenomenon has yet to yield to a quantitative and predictive theory.
In this seminar we will present a computational multi-physics model of hot cracking that rigorously accounts for phase transformations, microstructural effects, thermal and mass diffusion, fluid flow, solid mechanics, and fluid-solid interactions. We compare our modeling results to classical hot cracking experiments of binary and ternary alloys, and discuss the implications of our findings on alloy design and processing parameter optimization in the context of additive manufacturing. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |