Influence of pretreatment on microstructure, mechanical properties and fracture features of Ni₃Al samples synthesized by spark plasma sintering | Izvestiya vuzov. Fizika. 2021. № 8. DOI: 10.17223/00213411/64/8/74

Influence of pretreatment on microstructure, mechanical properties and fracture features of Ni₃Al samples synthesized by spark plasma sintering

A comparative study of microstructure parameters and mechanical properties characteristics of consolidated Ni₃Al samples obtained by spark plasma sintering after preliminary mechanical activation of a short duration and mixing in a mortar has been carried out. It was found that grain size of the material with preliminary mechanical activation is several times smaller than that of sintering after mixing in a mortar. This feature is manifested in the differences in the values of microhardness and short-term strength. The annealing temperature effect on structure parameters and mechanical properties level of Ni₃Al samples is revealed depending on the pretreatment used. It is assumed that the formation of a high-defect structural state, characterized by fine grains combined with increased microdistortions level, during mechanical activation predetermines the strength properties of the material both after spark plasma sintering and after deformation and thermal action.

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Keywords

nickel-aluminum system, intermetallic Ni₃Al, mechanical activation, spark plasma sintering, structure, mechanical properties

Authors

Name	Organization	E-mail
Osipov D.A.	Institute of Strength Physics and Materials Science of SB RAS; National Research Tomsk State University	osipov_ff_tsu@mail.ru
Smirnov I.V.	Institute of Strength Physics and Materials Science of SB RAS; National Research Tomsk State University	smirnov_iv@bk.ru
Grinyaev K.V.	Institute of Strength Physics and Materials Science of SB RAS; National Research Tomsk State University	kvgrinyaev@inbox.ru
Korotaev A.D.	Institute of Strength Physics and Materials Science of SB RAS; National Research Tomsk State University	korotaev@phys.tsu.ru
Pinzhin Yu.P.	Institute of Strength Physics and Materials Science of SB RAS; National Research Tomsk State University	pinzhin@phys.tsu.ru
Ditenberg I.A.	Institute of Strength Physics and Materials Science of SB RAS; National Research Tomsk State University	ditenberg_i@mail.ru
Korchagin M.A.	Institute of Solid State Chemistry and Mechanochemistry SB RAS	korchag@solid.nsc.ru
Esikov M.A.	Lavrentiev Institute of Hydrodynamics SB RAS	esikov@hydro.nsc.ru
Mali V.I.	Lavrentiev Institute of Hydrodynamics SB RAS	mali@hydro.nsc.ru

Всего: 9

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$Influence of pretreatment on microstructure, mechanical properties and fracture features of Ni<sub>3</sub>Al samples synthesized by spark plasma sintering | Izvestiya vuzov. Fizika. 2021. № 8. DOI: 10.17223/00213411/64/8/74$