Effects of element specific Co substitution in Ni-Mn-Ga-Fe and accelerated grain growth during heat treatment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10483531" target="_blank" >RIV/00216208:11320/24:10483531 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=NLSgAQF4.N" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=NLSgAQF4.N</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2024.175994" target="_blank" >10.1016/j.jallcom.2024.175994</a>
Alternative languages
Result language
angličtina
Original language name
Effects of element specific Co substitution in Ni-Mn-Ga-Fe and accelerated grain growth during heat treatment
Original language description
The substitution of small amounts of Co and Fe into Ni-Mn-Ga-based ferromagnetic shape memory alloys (FSMAs) is widely recognized for its ability to finely tune their multifunctional properties. This study investigated the effects of the substitution of each of the parent elements, in amounts of Co = 1, 3, and 5 (at.%), on the crystalline structure transformation temperature, microstructure, and magnetic properties of the nominal alloy Ni50Mn25Ga20Fe5. An induction melting technique was used to fabricate a series of 10 alloys with and without Co-substitution. In addition to determining the evolution of its magnetic and structural characteristics, Co-doping has been found to have an unexpected and beneficial effect on the grain microstructure. The findings of the study revealed that the Ni49Co1Mn25Ga20Fe5 alloy exhibited significant grain growth while demonstrating the mixed 10 M + 14 M martensitic crystal structure at ambient temperature. Separating an oriented grain of 1 x 2 mm enabled the experimental demonstration of magnetic field-induced structural rearrangement through twin-domain motion. Varying the levels of Co-substitution and the specific element being substituted allows tuning between the stabilisation of cubic austenite, modulated martensites (10 M or 14 M), or a non-modulated martensite at ambient temperature. Using standard melting facilities to fabricate large grains of polycrystalline ingots with 10 M + 14 M Co-doped Ni-Mn-Ga-Fe actuating elements offers a practical advantage over growing single crystals.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Alloys and Compounds
ISSN
0925-8388
e-ISSN
1873-4669
Volume of the periodical
1005
Issue of the periodical within the volume
listopad
Country of publishing house
CH - SWITZERLAND
Number of pages
9
Pages from-to
175994
UT code for WoS article
001297432000001
EID of the result in the Scopus database
2-s2.0-85201264631