Publication: Investigation of the effect of electric pulse heat treatment of rapid-quenched Ti50Ni25Cu25 alloy ribbons with a thin surface crystal layer on the structure formation from an amorphous state
Дата
2020
Авторы
Khabibullina, I. A.
Mashchenko, V. I.
Sivtsova, G. V.
Sitnikov, N. N.
Shelyakov, A. V.
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© Published under licence by IOP Publishing Ltd.This work is devoted to the study of the influence of electric pulse heat treatment of rapid-quenched Ti50Ni25Cu25 alloy ribbons (at. %) with a surface crystal layer. The object of the study was a rapid-quenched layered amorphous-crystal ribbon with a thickness of about 30 GMSH. A three-dimensional finite element mesh generator with built-in pre-and post-processing facilities. http://gmsh.info/m and a width of about 1.5 mm, in which a thin surface crystal layer (2.5 μm) was present on the non-contact side relative to the quenching wheel. The alloy samples were subjected to electric pulse treatment by passing a single pulse of electric current through the sample with a variable duration. For comparison, samples of the alloy were obtained, crystallized by standard isothermal heat treatment. The samples were characterized by means of scanning electron microscopy techniques, energy dispersive X-ray analysis and differential scanning calorimetry. It was shown that electric pulse treatment with an exposure time of less than 1 second leads to a significant change in the formed crystalline structure in comparison with the structure obtained by isothermal treatment. The microstructure of such samples in cross section is characterized by an uneven distribution of crystals over the thickness of the ribbon: columnar crystals are observed from the contact and non-contact sides of the ribbon, and large crystals are present in the inner part of the ribbon.
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Investigation of the effect of electric pulse heat treatment of rapid-quenched Ti50Ni25Cu25 alloy ribbons with a thin surface crystal layer on the structure formation from an amorphous state / Khabibullina, I.A. [et al.] // Journal of Physics: Conference Series. - 2020. - 1560. - № 1. - 10.1088/1742-6596/1560/1/012039