Microstructural origins of martensite stabilization in Ni49Co1Mn37.5Sn6.5In6 metamagnetic shape memory alloy

Paweł Czaja , Janusz Przewoźnik , Maciej Kowalczyk , Anna Wierzbicka-Miernik , Jerzy Morgiel , Wojciech Maziarz


Ordering effects in the Ni49Co1Mn37.5Sn6.5In6 alloy were studied by subjecting the alloy to annealing at 1220 K followed by water quenching and to subsequent annealing at 1070 K followed by slow cooling. Martensitic transformation temperature increases by 10 K owing to the slow cooling process, which further invites a change in the martensite structure: 6M → 10M. Across the transformation, regardless of the heat treatment applied, austenite phase is paramagnetic and it transforms into a weakly magnetic martensite. Magnetic moment of martensite is boosted due to slow cooling (ΔμeffM=1μB). Observed behaviours are associated with the changes in the degree of atomic ordering. Irrespective of the magnetic state of martensite, ordering process mitigates the transformation temperature most likely through the interaction with the free energy difference and through the influence of antiphase domains on the twinning stress.
Author Paweł Czaja - [Instytut Metalurgii i Inzynierii Materialowej Polskiej Akademii Nauk]
Paweł Czaja,,
, Janusz Przewoźnik - [AGH University of Science and Technology (AGH)]
Janusz Przewoźnik,,
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
, Maciej Kowalczyk (FMSE / DCFM)
Maciej Kowalczyk,,
- Division of Construction and Functional Materials
, Anna Wierzbicka-Miernik - [Instytut Metalurgii i Inzynierii Materialowej Polskiej Akademii Nauk]
Anna Wierzbicka-Miernik,,
, Jerzy Morgiel - [Instytut Metalurgii i Inzynierii Materialowej Polskiej Akademii Nauk]
Jerzy Morgiel,,
, Wojciech Maziarz - Instytut Metalurgii i Inżynierii Materiałowej im. Aleksandra Krupkowskiego Polskiej Akademii Nauk (IMIM) [Polish Academy of Sciences (PAN)] [Instytut Metalurgii i Inzynierii Materialowej Polskiej Akademii Nauk]
Wojciech Maziarz,,
Journal seriesJournal of Materials Science, ISSN 0022-2461, [1573-4803 ]
Issue year2019
Publication size in sheets0.65
Keywords in EnglishCobalt alloys; Cooling; Free energyIndium alloys; Magnetic moments; Manganese alloys; Martensitic transformations; Shape memory effect; Tin alloys
ASJC Classification2210 Mechanical Engineering; 2211 Mechanics of Materials; 2500 General Materials Science
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 14-01-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.065; WoS Impact Factor: 2018 = 3.442 (2) - 2018=3.021 (5)
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