Grain Refinement of Non-ferrous Metals and Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 4384

Special Issue Editors


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Guest Editor
Department of Metal Forming, National University of Science and Technology (MISIS), Moscow, Russia
Interests: solidification; structure; aluminum alloys; casting processes; technology; physical effects on melts; aluminum matrix composite materials; high-entropy alloys; quality improvement; processing of melts; properties of alloys; resource saving
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Faculty of Engineering, University of Kragujevac, 34000 Kragujevac, Serbia
Interests: materials science; materials testing; fatigue; fracture; service life; welding technology; surface regeneration
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Special Issue Information

Dear Colleagues,

Nonferrous alloys are now widespread in all industries—aircraft, rocketry, shipbuilding, automotive, construction, food, etc. The scales of their production are increasing every year.

The application of alloys is due to a set of special and often unique properties possessed by one or another group of light (aluminum, magnesium, titanium, etc.) and heavy (copper, nickel, zinc, etc.) non-ferrous alloys. The required level of mechanical, operational and special properties of various non-ferrous alloys depends on their structure and phase composition, which are determined, first, by the content of various alloying components. In most non-ferrous alloys, a more ordered shape, uniform distribution and dispersed size of structural components are desirable from the point of view of achieving the desired properties of semi-finished products and products.

The technologies for producing non-ferrous alloys, as well as blanks from them and products used in industry, are very diverse. The most widespread is the traditional approach aimed at modifying the structural components of alloys with various impurity additives and special technological methods for melt processing, which, as a result, leads to the refinement of grains, eutectics, intermetallics and various phases during the formation of the structure of alloys, which in turn is accompanied by an improvement in mechanical and other properties.

In this Special Issue, we will consider various resource-efficient technologies for the production and processing of various non-ferrous cast, wrought and special alloys (including physical effects on melts, the use of modifying elements, high cooling rates, etc.), leading to the modification of their structural components and the improvement of the complex properties of blanks and products.

We invite specialists from the academic and industrial communities to participate in our Special Issue, which will allow you to share experience, bring your scientific results and outline ways to further develop research in the areas presented.

Prof. Dr. Vladislav B. Deev
Dr. Dušan Arsić
Guest Editors

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Keywords

  • solidification
  • structure
  • aluminum alloys
  • casting processes
  • technology
  • physical effects on melts
  • aluminum matrix composite materials
  • high-entropy alloys
  • quality improvement
  • processing of melts
  • properties of alloys
  • resource saving

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Published Papers (2 papers)

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Research

24 pages, 31730 KiB  
Article
The Microstructural Refinement of the A356 Alloy Using Semi-Solid and Severe Plastic-Deformation Processing
by Mohamed Abdelgawad Gebril, Mohd Zaidi Omar, Intan Fadhlina Mohamed, Norinsan Kamil Othman, Ahmad Muhammad Aziz and Osama M. Irfan
Metals 2023, 13(11), 1843; https://doi.org/10.3390/met13111843 - 2 Nov 2023
Cited by 1 | Viewed by 1630
Abstract
Improving the engineering properties of A356 alloy is an appealing option for the automotive industry. This study aimed at refining and redistributing Si particles and the eutectic phase by applying T6 heat treatment to a semi-solid A356 alloy, followed by severe plastic deformation [...] Read more.
Improving the engineering properties of A356 alloy is an appealing option for the automotive industry. This study aimed at refining and redistributing Si particles and the eutectic phase by applying T6 heat treatment to a semi-solid A356 alloy, followed by severe plastic deformation (SPD). Using a cooling-slope technique, the as-cast and rheocast samples were subjected to heat treatment prior to being processed using equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) at room temperature. The results show that the brittle Si particles were effectively fragmented and redistributed in the homogenous microstructure. The grain size reduced from 170 μm to 23 μm in the as-cast sample after combining heat treatment and the cooling-slope. This was followed by the ECAP sample after six passes through route A (where the sample is not rotated between each pass), while it reduced to 160 nm after five turns of the HPT process in a heat-treated cooling-slope sample. The hardness of the heat-treated cooling-slope casting samples increased with the ECAP process; there was an increase from 61 HV to 134 HV for the as-cast alloy after six passes through route A. The hardness of the heat-treated cooling-slope sample improved with the HPT process to 211 HV after five turns. Full article
(This article belongs to the Special Issue Grain Refinement of Non-ferrous Metals and Alloys)
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13 pages, 3011 KiB  
Article
AlSi10Mg/AlN Interface Grain Structure after Laser Powder Bed Fusion
by Ivan A. Pelevin, Dmitriy Yu. Ozherelkov, Anton Yu. Nalivaiko, Anna I. Bodyakova, Stanislav V. Chernyshikhin, Boris O. Zotov, Andrey V. Korshunov and Alexander A. Gromov
Metals 2022, 12(12), 2152; https://doi.org/10.3390/met12122152 - 15 Dec 2022
Cited by 7 | Viewed by 2210
Abstract
Details and features of the grain structure near the interface region between the AlN ceramic phase and AlSi10Mg matrix after the laser powder bed fusion (LPBF) were investigated. Aluminum nitride particles were obtained through self-propagating high-temperature synthesis and mechanically mixed with aluminum matrix [...] Read more.
Details and features of the grain structure near the interface region between the AlN ceramic phase and AlSi10Mg matrix after the laser powder bed fusion (LPBF) were investigated. Aluminum nitride particles were obtained through self-propagating high-temperature synthesis and mechanically mixed with aluminum matrix powder. Optimization of the LPBF process parameters resulted in synthesized material free of pores and other defects. Optical microscopy analysis of etched cross-section and more detailed EBSD analysis revealed regions with relatively coarse grains at melting pool boundaries and fine grains in the melt pool core and near the AlN particles. Moreover, a pronounced orientation of fine elongated matrix grains towards the center of the ceramic particle was obtained. The such formed microstructure is attributed to directional heat sink during crystallization due to the higher thermal conductivity of aluminum nitride compared to the AlSi10Mg matrix. On the contrary, poor wettability of AlN by melt partly prevented the formation of such features, thus a combination of these factors determines the final microstructure of the interface in the resulting material. Full article
(This article belongs to the Special Issue Grain Refinement of Non-ferrous Metals and Alloys)
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