About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Functional and Energy Materials
|
Presentation Title |
A-16 (Digital): Quantitative Microstructure Study of Binder-jet Printed and Sintered Ni-Mn-Ga Alloy |
Author(s) |
Chuyuan Zheng, Amir Mostafaei, Pierangeli Rodriguez, Erica Stevens, Ian Nettleship, Markus Chmielus |
On-Site Speaker (Planned) |
Chuyuan Zheng |
Abstract Scope |
Ni-Mn-Ga alloy is a multi-functional ferromagnetic material and exhibits in the modulated martensite phase the magnetic shape memory effect. For enhanced magnetic-field-induced strain (MFIS), porosity is included to reduce twin-twin and twin-grain boundary interactions. Binder-jet printing and subsequent partial sintering provides an approach to introduce controlled porosity in a manner that is consistent with near-net shaping of green bodies suitable for practical applications. However, the process-structure relationships between binder-jet printing and the microstructure of the sintered alloy remain unstudied. In this work, the effect of sintering temperature and time was systematically evaluated. Micrographs were quantitatively analyzed to reveal the mesoscale microstructural evolution during sintering. Micro-CT was used to characterize, in 3D, the large defects generated during printing to establish their consequent effect on the final microstructure. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |