Comparison of the structure of grain boundaries and properties of superplastic 40HNU, 47HNM, and 67KN5B alloys

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发表日期：

2024年11月1日

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D. Yerbolatuly,
F. M. Noskov,
A. E. Makarenko,
E. V. Korotkova,
G. U. Yerbolatova,
G. S. Bektasova,
T. D. Perevalov,
L. N. Izmaylov,
V. N. Cherepanov,
A. V. Nyavro,
A. K. Kuznetsova,
L. I. Kveglis

摘要

A comparison of the structure and properties of 47HNM, 40HNU and 67KN5B alloys possessing superplasticity is performed. It is shown that during superplastic deformation in the grain-boundary layers of these alloys the systems of tetrahedral close-packed clusters with Frank-Kasper structures are formed. The use of cluster models allows attributing the manifestation of ferromagnetic properties in superplastic materials to a change in the electron density. A qualitative agreement with the experiment is confirmed by the calculation of the spectra of spin-polarized electrons performed for the cluster structures.