Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys

Deltell, Alexandre; Escoda, L.; Saurina, J.; Suñol, J.J.

doi:10.3390/met5020695

Cited by 16 publications

(6 citation statements)

References 21 publications

(29 reference statements)

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“…When the Sn content is at its lowest at y = 4, there is a huge increase in χac value. This is mainly due to the change in the magnetic anisotropy from cubic to uniaxial in the latter alloy [31,32,33,34,35,36]. Larger peaks can also be observed at 22, 24, 27 and 28 • C, with these results being similar to the results obtained for the ZFC-FC curves.…”

Section: Magnetic Susceptibilitysupporting

confidence: 84%

Martensitic Transformation and Magnetic Properties of Ni-Mn Quinary Heusler Alloy

Murthy

Sharma

et al. 2022

J. Compos. Sci.

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Ni-Mn-based quinary Heusler alloys have seldom been investigated with respect to their martensitic transformation and mechanical properties for near room temperature transformation. In the current work, we identified and investigated martensitic transformation near room temperature, and the martensitic properties of Ni-Mn-Sn-Fe-In-based quinary Heusler alloys. Alloys prepared in an argon-rich vacuum arc melting furnace. During X-ray diffraction (XRD) analysis, it was identified that the L21 cubic structure austenite phase of the alloy transforms into L10 orthorhombic martensite phase in the case of alloys with greater Fe substitution. The martensitic transformation zone of the alloy is also shifted to the near-room-temperature range of 15–28 °C by changing the stoichiometry of the alloy composition. Magnetic measurements like field heating (FH), field cooling (FC) and zero field cooling (ZFC) indicate the presence of a dual magnetic phase in the alloy, while magnetic susceptibility testing also helped to establish claims regarding the magnetic measurement results.

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Section: Magnetic Susceptibilitysupporting

confidence: 84%

Martensitic Transformation and Magnetic Properties of Ni-Mn Quinary Heusler Alloy

Murthy

Sharma

et al. 2022

J. Compos. Sci.

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“…Figure 5 shows a phase diagram of the martensite start temperature versus e/a. The comparison is performed with data obtained in bulk alloys [27]. Our values are lower due to the lower dimensionality of the samples.…”

Section: Resultsmentioning

confidence: 94%

Martensitic Transformation and Crystalline Structure of Ni50Mn50−xSnx Melt-Spun Heusler Alloys

et al. 2020

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The structure and thermal behavior are key factors that influence the functional response of Ni–Mn–Sn alloys. The present study reports the production as well as the structure and thermal analysis of melt-spun (solidification rate: 40 ms−1) Ni50 Mn50−xSnx (x = 10, 11, 12 and 13 at.%) alloys. X-ray diffraction measurements were performed at room temperature. The austenite state has an L21 structure, whereas the structure of the martensite is 7M or 10M (depending on the Sn/Mn percentage). Furthermore, the structural martensitic transformation was detected by differential scanning calorimetry (DSC). As expected, upon increasing the Sn content, the characteristic temperatures also increase. The same tendency is detected in the thermodynamic parameters (entropy and enthalpy). The e/a control allows the development production of alloys with a transformation close to room temperature.

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“…As discussed above, a first-order structural phase transition occurs between the austenite and martensite phases during MT. While the austenite phase usually has a cubic L21 crystal structure, the martensite phase may have monoclinic 10M and 14M, orthorhombic 4O or unmodulated double tetragonal L10 crystal structures depending on the composition and temperature [8][9][10][11]. XRD patterns of the V0, V1, V2 and V3 samples at RT are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Variation of Electrical Resistivity During Magnetic Field-Induced Martensitic Transformation in Vanadium added NiMnSnB alloys

Кират

2023

Turkish Journal of Science and Technology

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In this study, the structural and electrical properties of Ni49-xVxMn37Sn12B2 (x = 0, 1, 2, and 3) ferromagnetic shape memory alloys were investigated. According to XRD analyzes at room temperature, the x=0 sample was in the martensite phase, the x=1 and 2 samples were in the mixture phase, and the x=3 sample was in the austenite phase. The resistivity analyses depend on temperature showed that all samples exhibited martensitic transformation and the phase transformation temperature decreased with V doping. Magnetoresistance (MR) values were calculated using ρ-T curves performed under 0 T and 1 T magnetic fields. The observed negative MR is consistent with Kataoka's s-d model. As-Af interval was determined and M-H measurements were made at constant temperatures determined in this interval. The results were attributed to the magnetic field-induced phase transformation (MFIPT). In order to examine the effects of MFIPT on the electrical resistivity, the resistivity depend on magnetic field was measured using the same thermal process. The overlapping of the curves in the high magnetic field revealed that the resistivity decreased due to the MFIPT as well as the MR.

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Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys

Cited by 16 publications

References 21 publications

Martensitic Transformation and Magnetic Properties of Ni-Mn Quinary Heusler Alloy

Martensitic Transformation and Magnetic Properties of Ni-Mn Quinary Heusler Alloy

Martensitic Transformation and Crystalline Structure of Ni50Mn50−xSnx Melt-Spun Heusler Alloys

Variation of Electrical Resistivity During Magnetic Field-Induced Martensitic Transformation in Vanadium added NiMnSnB alloys

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