The Effect of Thermodeformation Treatment on the Structure
and Strengthening of the Al–7.1% Zn–2.8% Mg–1.4% Ni–1.1% Fe
Alloy Produced via Casting in an Electromagnetic Crystallizer

N. A. Belov; Белов Н. А.; V. N. Timofeev; Тимофеев В. Н.; S. O. Cherkasov; Черкасов С. О.; M. M. Motkov; Мотков М. М.; A. F. Musin; Мусин А. Ф.

doi:10.31857/S0015323022601106

The Effect of Thermodeformation Treatment on the Structure and Strengthening of the Al–7.1% Zn–2.8% Mg–1.4% Ni–1.1% Fe Alloy Produced via Casting in an Electromagnetic Crystallizer

Authors: Belov N.A.¹, Timofeev V.N.², Cherkasov S.O.¹, Motkov M.M.², Musin A.F.¹
Affiliations:
1. MISiS National University of Science and Technology
2. Siberian Federal University
Issue: Vol 124, No 4 (2023)
Pages: 436-443
Section: ПРОЧНОСТЬ И ПЛАСТИЧНОСТЬ
URL: https://rjmseer.com/0015-3230/article/view/662882
DOI: https://doi.org/10.31857/S0015323022601106
EDN: https://elibrary.ru/VHXIBF
ID: 662882

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Abstract
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Abstract

A calculation technique (Thermo-Calc software code) and experimental methods (scanning and transmission electron microscopy and X-ray spectral analysis) have been used to study the effect of thermodeformation treatment on the structure and strengthening of the Al–7.1% Zn–2.8% Mg–1.4% Ni–1.1% Fe alloy produced via casting in an electromagnetic crystallizer (EMC). It has been shown that at a cooling rate higher than 103 K/s, the entire amount of iron, which exceeds its content in the grade AZ6NF alloy (GOST 4784–2019) by two times, is bound into eutectic inclusions of the Al9FeNi phase of a submicron size. The
combination of high hardness (more than 190 HV) and ductility indicates the advantages of applying the EMC technology to this alloy.

Keywords

aluminum alloys, 7XXX series, phase composition, microstructure, electromagnetic crystallizer

References

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