About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Functional and Energy Materials
|
Presentation Title |
Experimental Investigation of Melt Pool Geometry, Microstructure, and Texture in NiMnGa Fabricated via Laser Powder Bed Fusion |
Author(s) |
Yao Xu, Sneha Prabha Narra |
On-Site Speaker (Planned) |
Yao Xu |
Abstract Scope |
Polycrystalline NiMnGa has been fabricated by laser powder bed fusion (LPBF). However, the major disadvantage of polycrystalline NiMnGa is the low magnetic-field-induced-strain because of the strain incompatibility. One possible solution is to attain a microstructure with textured columnar grains. Hence, it is critical to map the effect of primary deposition parameters on NiMnGa solidification microstructure. In this work, single-bead melt tracks were deposited at different power, velocity, and spot size combinations to investigate the available processing space for LPBF processes. Grain size, orientation, composition, and melt pool geometry information were studied using SEM and optical microscopy. NiMnGa melt tracks with textured columnar grains can be achieved by altering the solidification conditions and melt pool geometry. In addition, grain size and evaporation are also a function of processing parameters. This work establishes a comprehensive understanding of the effect of primary deposition parameters on the as-fabricated NiMnGa microstructure. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |