About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Rapid Alloy Design via Additively Manufacturing Compositionally Graded Materials |
Author(s) |
Siyuan Wei, Yakai Zhao, Pei Wang, Upadrasta Ramamurty |
On-Site Speaker (Planned) |
Yakai Zhao |
Abstract Scope |
Currently, there has been extensive work done on laser powder bed fusion (L-PBF) fabricated metallic parts, but most of the alloys explored are those designed for conventional methods. Hence, metal L-PBF is still in its nascent stage, with the exploration of new alloy chemistries and/or fabrication of components with unique functional and/or mechanical properties being relatively unexplored. For the former, in-situ alloying offers significant potential in terms of exploring the composition-microstructure-property relationship by easily adjusting the powder feedstock mixtures. Here, in-situ alloying is utilized in building compositionally graded Fe-Al alloys. Microstructural characterization of the fabricated coupons shows a columnar to equiaxed grain structure transition with increasing Al content along the building direction, which is induced by the constitutional undercooling. This method is promising in rapidly examining composition-microstructure-property relationship of various classes of alloys and then sheds light on new paradigm of alloy design. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Iron and Steel, Solidification |