Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effect of High Energy Ball Milling Time on the Density and Mechanical Properties of W-7%Ni-3%Fe Alloy

A. V. Nokhrin
* ORCID logo ,
N. V. Malekhonova
* ,
V. N. Chuvil’deev
,
N. V. Melekhin
,
A. M. Bragov
,
A. R. Filippov
,
M. S. Boldin
ORCID logo ,
E. A. Lantsev
,
N. V. Sakharov
Version 1 : Received: 17 April 2023 / Approved: 18 April 2023 / Online: 18 April 2023 (08:12:49 CEST)

A peer-reviewed article of this Preprint also exists.

Nokhrin, A.V.; Malekhonova, N.V.; Chuvil’deev, V.N.; Melekhin, N.V.; Bragov, A.M.; Filippov, A.R.; Boldin, M.S.; Lantsev, E.A.; Sakharov, N.V. Effect of High-Energy Ball Milling Time on the Density and Mechanical Properties of W-7%Ni-3%Fe Alloy. Metals 2023, 13, 1432. Nokhrin, A.V.; Malekhonova, N.V.; Chuvil’deev, V.N.; Melekhin, N.V.; Bragov, A.M.; Filippov, A.R.; Boldin, M.S.; Lantsev, E.A.; Sakharov, N.V. Effect of High-Energy Ball Milling Time on the Density and Mechanical Properties of W-7%Ni-3%Fe Alloy. Metals 2023, 13, 1432.

Abstract

The present work was aimed at the investigation of effect of High Energy Ball Milling (HEBM) time on the sintering kinetics, structure, and properties of heavy tungsten alloy (HTA) W-7%Ni-3%Fe. The HTA samples were obtained from the nanopowders (20-80 nm) by conventional liquid phase sintering (LPS) in hydrogen and by Spark Plasma Sintering (SPS) in vacuum. The HTA density was shown to depend on the HEBM time non-monotonously that originates from the formation of non-equilibrium solid solutions in the W-Ni-Fe systems during HEBM. The SPS kinetics of the HTA nanopowders was shown to have a two-stage character, the intensity of which depends on the Coble diffusion creep rate and on the intensity of diffusion of the tungsten atoms in the crystal lattice of the -phase. The kinetics of sintering of the initial submicron powders have a single-stage character originating from the intensity of the grain boundary diffusion in the -phase. The dependencies of the hardness and of the yield strength on the grain sizes were found to obey the Hall-Petch relation. The hardness, strength, and dynamic strength in the compression tests of the fine-grained tungsten alloys obtained by SPS and LPS were studied.

Keywords

tungsten alloys; nanopowders; high energy ball milling; spark plasma sintering; strength

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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