B2-L10 thermoelastic transformation on Ni50Mn29Sb12.5Co8.5 shape memory Heusler alloy

Autor: Murat Eskil, Kemal Aldaş
Přispěvatelé: Sabire Yazıcı Fen Edebiyat Fakültesi
Rok vydání: 2022
Předmět:
Zdroj: Applied Physics A. 128
ISSN: 1432-0630
0947-8396
Popis: In this study, a series of practically unique and valuable properties that occur with the structural phase transformation on the Shape Memory Ni50Mn29Sb12,5Co8,5 Heusler alloy with comparing different homogenization times, were investigated. From the results of X-ray diffraction (XRD) measurements carried out in this study, B2 → Θ (L10) structural phase transformation was observed. It has been understood that the alloy exhibits a ferromagnetic transition via Vibrating Sample Magnetometer (VSM) as well as the thermoelastic martensitic transformation detected by Differential Scanning Calorimetry (DSC) investigations. At the same time, it has been determined that the paramagnetic β phase has B2 type bcc lattice structure. It has been determined that β (B2) → Θ (L10) diffusionless phase transformation, which is considered as a structural phase transition occurring in the material, includes a martensitic mechanism with narrow temperature hysteresis. It was determined that the average lattice parameter of the B2 lattice was 2.956 Å. It was understood that the thick 110B2 reflection was divided into 110B2 and 111L10 peaks according to the measurements made between 42° and 44° angles. The diffraction peaks obtained in the study prove the existence of parallel L10 lamellae of the martensite phase with habit plane boundaries close to {110}B2. All these findings were supported by scattering electron microscope (SEM) and metal microscopy studies.
Databáze: OpenAIRE
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