|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Late News Poster Session
|J-52: Towards a Magnetic Field Induced Strain in Additive Manufactured NiMnGa Shape Memory Alloys
|Robert Chulist, Anna Wójcik, Maciej Kowalczyk, Łukasz Żrodowski, Norbert Schell, Rafał Wróblewski, Wojciech Maziarz
|On-Site Speaker (Planned)
Selective laser melting (SLM) process was used to manufacture NiMnGa-based polycrystalline samples. The initial powders were firstly prepared by ball milling process producing a fine particle size of about 20 µm. Depending on the composition and printing parameters three distinct types of martensite crystal structures, namely simple tetragonal, and two monoclinic modulated i.e. 10M and 14M were obtained. The localized heating/cooling conditions produce a layered microstructure with a strong fiber <100> texture along the growth direction. The crystal structure and crystallographic texture drastically change when laser oscillation mode is chosen. The results are discussed with respect to crystallographic texture, printing mode, heat treating process, and the resulting magnetic field-induced strain. The financial support by National Centre for Research and Development of Poland is acknowledged for funding (TECHMATSTRATEG 2/410941/4/NCBR/ 2019).
|Additive Manufacturing, Phase Transformations, Characterization