|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||L-56: High Resolution STEM and LM STEM DPC Studies of Ni-Mn-Ga Based Precursor Powders and 3D Printed Magnetic Shape Memory Alloys
||Pawel M. Czaja, Anna Wójcik, Robert Chulist, Maciej Kowalczyk, Wojciech Maziarz
|On-Site Speaker (Planned)
||Pawel M. Czaja
The Ni-Mn-Ga based magnetic shape memory alloys have been longed researched with reference to the magnetic field induced strain (MFIS) offering high frequency actuation response and strain output of up to 12% in single crystalline alloy, depending on martensite crystal structure. The structure itself is sensitive to composition and fabrication routes. Special consideration should be given to alloys produced by additive manufacturing in respcet of various powder feed sources, compositional homogeneity and resulting microstructure of 3D printed parts. In this contribution advanced high resolution scanning transmission electron microscopy (HR-STEM) and low magnification STEM (LM STEM) combined with differential phase contrast analysis (DPC) are applied to pin point minute local compositional changes, structure identity and magnetic domain arrangements in precursor powders and in as selected laser melted Ni-Mn-Ga based magnetic shape memory alloys.
Acknowledgement: National Centre for Research and Development (NCBiR) of Poland is acknowledged for funding (TECHMATSTRATEG 2/410941/4/NCBR/ 2019).
||Characterization, Additive Manufacturing, Magnetic Materials