The effects of homogenization time on the crystal structure and hardness of NiMnGaMo alloy

Dal, Serkan; Demirel, Bilal; Eskil, Murat

doi:10.1016/j.jestch.2020.04.005

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…Scientific development on Heusler alloys has shown the great versatility that this new class of compounds offers. Alloys in this category have attracted attention due to their important characteristics such as magnetic shape memory effect, magnetocaloric effect, and large magnetoresistance effect [1][2][3] . During the past two decades, intensive attention has been devoted to these multifunctional alloys due to their great potential for applications in magnetic sensing, actuation and magnetic refrigeration 4 .…”

Section: Introductionmentioning

confidence: 99%

Structural, Thermal and Magnetic Characterization of Polycrystalline Ni-Mn-Ga Ferromagnetic Shape Memory Alloys

Batista,

Quirino,

Souto

et al. 2023

Mat. Res.

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Shape memory alloys (SMA) are now widely studied in academia and have increasing usage in industry, as they allow efficient performance compared to mechanic actuators with reduced dimensions and the possibility of sensing temperature through the material itself. A subclass of the SMAs are the alloys with magnetic shape memory, still little explored as intelligent materials in Brazil. They combine the best properties of SMAs and common magnetostrictive materials. The magnetic shape memory alloys (MSMA) can be activated not only by the presence of a thermal stimulus, but also by the presence of an applied magnetic field. In this research, the polycrystalline magnetic shape memory alloys Ni 51.3 Mn 24 Ga 24.7 and Ni 54 Mn 21 Ga 25 were manufactured and characterized. Differential scanning calorimetry, X-Ray diffraction, energy dispersive X-ray spectrometry and scanning electron microscopy analyzes were performed to thermoanalytically and crystallographically characterize the alloys. Magnetic characterizations were also performed using Magnetic force microscopy. The results of the characterizations showed that the production process and the heat treatment were satisfactory for the fabrication of the ferromagnetic polycrystalline alloys. Besides that, the compositions Ni 51.3 Mn 24 Ga 24.7 and Ni 54 Mn 21 Ga 25 , presented austenitic and martensitic 5M structures, respectively, at room temperature and it was possible to observe the alignment of the magnetic domains after magnetization.

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Section: Introductionmentioning

confidence: 99%

Structural, Thermal and Magnetic Characterization of Polycrystalline Ni-Mn-Ga Ferromagnetic Shape Memory Alloys

Batista,

Quirino,

Souto

et al. 2023

Mat. Res.

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“…Some methods can be used to adjust the required transformation temperatures depending on the applications of NiTi SMAs [7,8]. For example, changing the element ratios of the alloy, adding different elements, changing the homogenization temperature, and quenching conditions [9,10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermal Behavior and Microstructure of Carbon Added NiTi Shape Memory Alloys

ERCAN

2022

International Journal of Innovative Engineering Applications

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Original scientific paperThis study aims to examine the thermal and microstructural properties of NiTiC1 and NiTiC2 shape memory alloys (SMAs) produced by arc-melting method. It was observed that additive C did not alter the phase transformation order which remained as one-step (𝐵2 ↔ 𝐵19′). Additionally, the effect of C addition on thermal properties of the Ni-riched NiTi alloy(s), including temperature hysteresis, enthalpy, entropy, and Gibbs free energies were also determined. An increase in the amount of C noticeably reduced the detectable grain size and thus decreased the elastic energy of the alloy. In DSC analysis, the presence of martensitic phases in the alloys was determined below the room temperature. The presence of B2 austenite, Ni4Ti3 precipitate, and TiC phases were detected in XRD analyses, which were supported by SEM-EDX results. Grain boundaries were clearly observed and precipitates were found to be homogeneously distributed.

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Manipulation of microstructure evolution and deformation behavior in Ni–Mn–Ga shape memory alloys with varied Ni/Ga under uniaxial cyclic compression

Wang,

Ding,

Chen

et al. 2024

Rare Met.

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The effects of homogenization time on the crystal structure and hardness of NiMnGaMo alloy

Cited by 4 publications

References 31 publications

Structural, Thermal and Magnetic Characterization of Polycrystalline Ni-Mn-Ga Ferromagnetic Shape Memory Alloys

Structural, Thermal and Magnetic Characterization of Polycrystalline Ni-Mn-Ga Ferromagnetic Shape Memory Alloys

Investigation of Thermal Behavior and Microstructure of Carbon Added NiTi Shape Memory Alloys

Manipulation of microstructure evolution and deformation behavior in Ni–Mn–Ga shape memory alloys with varied Ni/Ga under uniaxial cyclic compression

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