Effect of heat treatment on martensitic transformation of Ni47Mn40Sn13 ferromagnetic shape memory alloy prepared by mechanical alloying

Varzaneh, A. Ghotbi; Kameli, P.; Zahedi, V.R; Karimzadeh, F.; Salamati, H.

doi:10.1007/s12540-015-4537-0

Cited by 24 publications

(6 citation statements)

References 32 publications

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“…In this context, the metallic particle production, their characterization and properties optimization are milestones to get valuable functional composites [29][30][31][32][33]. Mechanical milling is a simple method to produce micro and nanoparticles but unfortunately produces huge internal stress, defects and deformations that strongly modifies properties of the bulk alloy [34][35][36][37][38][39]. As an example, the high density of the anti-phase boundaries linked to dislocations produced during the milling process [40] or the local atomic disordering in boundary region [29] promotes antiferromagnetic coupling between Mn moments and consequently a reduction in the saturation magnetization of both martensitic and austenitic phases.…”

Section: Introductionmentioning

confidence: 99%

Influence of Structural Defects on the Properties of Metamagnetic Shape Memory Alloys

Pérez-Landazábal

Sánchez-Alarcos

Recarte

et al. 2020

Metals

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The production of μ-particles of Metamagnetic Shape Memory Alloys by crushing and subsequent ball milling process has been analyzed. The high energy involved in the milling process induces large internal stresses and high density of defects with a strong influence on the martensitic transformation; the interphase creation and its movement during the martensitic transformation produces frictional contributions to the entropy change (exothermic process) both during forward and reverse transformation. The frictional contribution increases with the milling time as a consequence of the interaction between defects and interphases. The influence of the frictional terms on the magnetocaloric effect has been evidenced. Besides, the presence of antiphase boundaries linked to superdislocations helps to understand the spin-glass behavior at low temperatures in martensite. Finally, the particles in the deformed state were introduced in a photosensitive polymer. The mechanical damping associated to the Martensitic Transformation (MT) of the particles is clearly distinguished in the produced composite, which could be interesting for the development of magnetically-tunable mechanical dampers.

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Section: Introductionmentioning

confidence: 99%

Influence of Structural Defects on the Properties of Metamagnetic Shape Memory Alloys

Pérez-Landazábal

Sánchez-Alarcos

Recarte

et al. 2020

Metals

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“…32 Residual stress is also retained when the samples are cycled through the phase transformation, 33 being one of the main causes of the degradation of the MT, the deformation behavior, and the shape memory effect. 34 Additionally, the presence of defects induced during the synthesis of nanoparticles may inhibit the MT 35 and influence the ferromagnetic (FM) interactions. 36 Thus, the characterization of defects, the local stress-state, and their influence on the MT will provide a more proper tuning of the structural and magnetic properties of these alloys for more extensive applications.…”

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confidence: 99%

119Sn Mössbauer spectroscopy for assessing the local stress and defect state towards the tuning of Ni-Mn-Sn alloys

Unzueta

López-García

Sánchez-Alarcos

et al. 2017

Applied Physics Letters

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The influence of defects and local stresses on the magnetic properties and martensitic transformation in Ni 50 Mn 35 Sn 15 is studied at macroscopic and atomic scale levels. We show that both the structural and magnetic properties of the alloy are very sensitive to slight microstructural distortions. Even though no atomic disorder is induced by milling, the antiphase boundaries linked to dislocations promote the antiferromagnetic coupling of Mn, resulting in a significant decrease in the saturation magnetization. On the other hand, the temperature range of the transformation is considerably affected by the mechanically induced local stresses, which in turn does not affect the equilibrium temperature between the austenitic and martensitic phases. Finally, we demonstrate that the recovery of the martensitic transformation is directly related to the intensity of the non-magnetic component revealed by 119 Sn M€ ossbauer spectroscopy. This result opens the possibility of quantifying the whole contribution of defects and the local stresses on the martensitic transformation in Ni-Mn-Sn alloys.Published by AIP Publishing. [http://dx.

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“…The Cd-doping effect on the MCE properties has been explored by the indirect and direct measurements of the magnetic field-induced entropy change and adiabatic temperature change, respectively. [42]. The powders were compressed and encapsulated in a quartz tube under Ar atmosphere to avoid oxidation during heat treatments.…”

Section: Introductionmentioning

confidence: 99%

Cd-doping effects in Ni–Mn–Sn: experiment and ab-initio study

Ghazinezhad¹,

Kameli²,

Varzaneh³

et al. 2022

J. Phys. D: Appl. Phys.

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Martensitic transformation (MT), magnetic properties, and magnetocaloric effect (MCE) in Heusler-type Ni47Mn40Sn13-xCdx (x = 0, 0.75, 1, 1.25 at. %) metamagnetic shape memory alloys (MetaMSMAs) are investigated, both experimentally and theoretically, as a function of doping with Cd. Ab-initio computations reveal that the ferromagnetic (FM) configuration is energetically more favorable in the cubic phase than the antiferromagnetic (AFM) state in undoped and doped alloys as well. Moreover, it is revealed that the alloys in the ground state exhibit a tetragonal structure confirming the existence of MT, in agreement with the experiments. It was indicated, both in theory and practice, that a reduction of the unit cell volume and an increase of the MT temperature as a function of the Cd doping. Indirect estimations of MCE in the vicinity of MT were carried out by using thermomagnetization curves measured under different magnetic fields up to 5 T. The results demonstrated that the doped alloys exhibit enhanced values of the inverse MCE comparable with those of Ni-Mn-based MetaMSMAs. Maximum magnetic entropy change in a field change of 2 T increases from 3.0 for the undoped alloy to 3.4 and 5.0 for the alloys doped with 0.75 and 1 at.% of Cd, respectively. The inverse and conventional MCE were explored by direct measurements of the adiabatic temperature change under the magnetic field change of 1.96 T. The Cd doping increased the maximum of inverse MCE by nearly 78% from 0.9 K to 1.6 K for the undoped and doped alloys, respectively. The results depicted that Cd doping can effectively tailor the structural, magnetic, and MCE properties of the Ni–Mn–Sn MetaMSMAs.

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Effect of heat treatment on martensitic transformation of Ni47Mn40Sn13 ferromagnetic shape memory alloy prepared by mechanical alloying

Cited by 24 publications

References 32 publications

Influence of Structural Defects on the Properties of Metamagnetic Shape Memory Alloys

Influence of Structural Defects on the Properties of Metamagnetic Shape Memory Alloys

119Sn Mössbauer spectroscopy for assessing the local stress and defect state towards the tuning of Ni-Mn-Sn alloys

Cd-doping effects in Ni–Mn–Sn: experiment and ab-initio study

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