| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Prediction of Large Regions of Microstructure and Phase Distributions for Additive Manufactured Alloys Prediction of the Microstructure, Resultant Phases and Hardness of Additively Manufactured Ti6Al4V |
| Author(s) |
Shunyu Liu, Kyung-min Hong, Yung C. Shin |
| On-Site Speaker (Planned) |
Yung C. Shin |
| Abstract Scope |
In this presentation, a quantitative link between thermal history and resulting solidification as well as solid-state phase transformation throughout multi-track Ti6Al4V built by laser direct deposition (LDD) is systematically established using three combined multi-physics predictive models. A three-dimensional (3D) LDD model was first employed to simulate the thermal behavior, from which the extracted temperature field was coupled to a 3D cellular automaton (CA) model to simulate the comparative growth of β grains during solidification. A phase prediction model was then incorporated with the simulated heating/cooling rates to quantify the β→α/α’ transformation in the final microstructure. Based on the predicted volume fractions of α and α’ in fusion zone and heat affected zone, microhardness for a given position in the deposition was assessed. The predicted thermal history, distribution and growth pattern of solidified β grains and microhardness were all in a good agreement with experimental measurements and microstructural characterization. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, ICME, Modeling and Simulation |