Effect of Severe Plastic Deformation on Structure Refinement and Mechanical Properties of the Al-Zn-Mg-Fe-Ni Alloy

This paper identifies the mechanisms of phase and structural transformations during severe plastic deformation by shearing under pressure (high-pressure torsion) of an Al-Zn-Mg-Fe-Ni-based aluminum alloy depending on different initial states of the material (an ingot after homogenizing annealing and...

Full description

Saved in:
Bibliographic Details
Published in:Metals (Basel ) 2021-02, Vol.11 (2), p.296
Main Authors: Brodova, Irina, Rasposienko, Dmitriy, Shirinkina, Irina, Petrova, Anastasia, Akopyan, Torgom, Bobruk, Elena
Format: Article
Language:English
Subjects:
Al-Zn-Mg alloy
Alloys
Aluminides
Aluminum
Composite materials
Deformation effects
Dynamic recrystallization
Elongation
Ferrous alloys
fragmentation
Grain size
high pressure torsion
Intermetallic phases
Iron
Magnesium
Mechanical properties
Metallurgical constituents
Methods
Microhardness
nanocomposite
Nanocomposites
nanomaterials
Nickel
Phase transitions
Plastic deformation
Powder metallurgy
Shearing
Silicon carbide
Tensile strength
Tensile tests
Ultimate tensile strength
Yield strength
Yield stress
Zinc
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper identifies the mechanisms of phase and structural transformations during severe plastic deformation by shearing under pressure (high-pressure torsion) of an Al-Zn-Mg-Fe-Ni-based aluminum alloy depending on different initial states of the material (an ingot after homogenizing annealing and a rod produced by radial-shear rolling). Scanning and transmission electron microscopy are used to determine the morphological and size characteristics of the structural constituents of the alloy after high-pressure torsion. It has been found that, irrespective of the history under high-pressure torsion, fragmentation and dynamic recrystallization results in a nanostructural alloy with a high microhardness of 2000 to 2600 MPa. Combined deformation processing (high-pressure torsion + radial-shear rolling) is shown to yield a nanocomposite reinforced with dispersed intermetallic phases of different origins, namely Al9FeNi eutectic aluminides and MgZn2, Al2Mg3Zn3, and Al3Zr secondary phases. The results of uniaxial tensile testing demonstrate good mechanical properties of the composite (ultimate tensile strength of 640 MPa, tensile yield strength of 628 MPa, and elongation of 5%).
ISSN:2075-4701
2075-4701
DOI:10.3390/met11020296