On the impact of additive manufacturing processes on the microstructure and magnetic properties of Co–Ni–Ga shape memory Heusler alloys

doi:10.1002/adem.202200069

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DOI Доступ к ресурсу на сайте издателя				10.1002/adem.202200069

Title: On the impact of additive manufacturing processes on the microstructure and magnetic properties of Co–Ni–Ga shape memory Heusler alloys
Creator: Scheibel, Franziska
Creator: Lauhoff, Christian
Creator: Riegg, Stefan
Creator: Krooß, Philipp
Creator: Bruder, Enrico
Creator: Adabifiroozjaei, Esmaeil
Creator: Molina-Luna, Leopoldo
Creator: Böhm, Stefan
Creator: Chumlyakov, Yuri I.
Creator: Niendorf, Thomas
Creator: Gutfleisch, Oliver
Subject: аддитивные технологические процессы
микроструктура
магнитные свойства
Гейслера сплавы
Date: 2022
DOI: 10.1002/adem.202200069
Description: Microstructure design allows to prevent intergranular cracking and premature failure in Co–Ni–Ga shape memory alloys. Favorable grain boundary configurations are established using additive manufacturing techniques, namely, direct energy deposition (DED) and laser powder bed fusion (L-PBF). L-PBF allows to establish a columnar grain structure. In the Co–Ni–Ga alloy processed by DED, a microstructure with strong ⟨001⟩ texture is obtained. In line with optimized microstructures, the general transformation behavior is essential for performance. Transition parameters such as transition temperature and thermal hysteresis depend on chemical composition, homogeneity, and presence of precipitates. However, these parameters are highly dependent on the processing method used. Herein, the first-order magnetostructural transformation and magnetization properties of Co–Ni–Ga processed by DED and L-PBF are compared with single-crystalline and as-cast material. In the alloy processed by L-PBF, Ga evaporation and extensive formation of the ferromagnetic Co-rich γ'-phase are observed, promoting a very wide transformation range and large thermal hysteresis. In comparison, following DED, the material is characterized by minor chemical inhomogeneity and transition and magnetization behavior being similar to that of a single crystal. This clearly renders DED-processed Co–Ni–Ga to become a promising candidate material for future shape memory applications. © 2022 The Authors. Advanced Engineering Materials published by Wiley-VCH GmbH.

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collection(s): Сибирский физико-технический институт
Identifier: koha:000924027
https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000924027
Type: статьи в журналах
Source: Advanced engineering materials. 2022. Vol. 24, № 10. P. 2200069 (1-11)
Language: eng

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Сибирский физико-технический институт On the impact of additive manufacturing processes on the microstructure and magnetic properties of Co–Ni–Ga shape memory Heusler alloys