| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Assessing the Printability of Metal Alloys for Additive Manufacturing |
| Author(s) |
Raymundo Arroyave, Luke Johnson, Raiyan Seede, Mohamad Mahmoudi, Bing Zhang, Alaa Elwany, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Raymundo Arroyave |
| Abstract Scope |
We propose a methodology for predicting the printability of an alloy, subject to laser powder bed fusion additive manufacturing. Regions in the process space associated with keyhole formation, balling, and lack of fusion are assumed to be strong functions of the geometry of the melt pool, which in turn is calculated for various combinations of laser power and scan speed via a Finite Element thermal model that incorporates a novel vaporization-based transition from surface to volumetric heating upon keyhole formation. Process maps established from the Finite Element simulations agree with experiments for a Ni-5wt.\%Nb alloy and an equiatomic CoCrFeMnNi High Entropy Alloy and suggest a strong effect of chemistry on alloy printability. Uncertainties in the printability maps were quantified via Monte Carlo sampling. The printability maps generated with the proposed method can be used in the selection---and potentially the design---of alloys best suited for Additive Manufacturing. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |