Multiscale modification of aluminum alloys with deep cryogenic treatment for advanced properties

Matic Jovičević-Klug; Levi Tegg; Patricia Jovičević-Klug; Goran Dražić; László Almásy; Bryan Lim; Julie M. Cairney; Bojan Podgornik

Journal of Materials Research and Technology (Nov 2022)

Multiscale modification of aluminum alloys with deep cryogenic treatment for advanced properties

Matic Jovičević-Klug,
Levi Tegg,
Patricia Jovičević-Klug,
Goran Dražić,
László Almásy,
Bryan Lim,
Julie M. Cairney,
Bojan Podgornik

Affiliations

Matic Jovičević-Klug: Max-Planck Institute for Iron Research, Max-Planck-Str. 1, 40237 Düsseldorf, Germany; Corresponding author.
Levi Tegg: School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Camperdown, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, Camperdown, NSW 2006, Australia
Patricia Jovičević-Klug: Max-Planck Institute for Iron Research, Max-Planck-Str. 1, 40237 Düsseldorf, Germany; Institute of Metals and Technology, Lepi Pot 11, 1000 Ljubljana, Slovenia; Corresponding author.
Goran Dražić: National Institute of Chemistry, Hajdrihova Ulica 19, 1000 Ljubljana, Slovenia
László Almásy: Institute for Energy Security and Environmental Safety, Centre for Energy Research, Konkoly Thege Miklos út 29-33, Budapest 1121, Hungary
Bryan Lim: School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Camperdown, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, Camperdown, NSW 2006, Australia
Julie M. Cairney: School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Camperdown, NSW 2006, Australia; Australian Centre for Microscopy and Microanalysis, The University of Sydney, Camperdown, NSW 2006, Australia
Bojan Podgornik: Institute of Metals and Technology, Lepi Pot 11, 1000 Ljubljana, Slovenia

Journal volume & issue: Vol. 21
pp. 3062 – 3073

Abstract

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Deep cryogenic treatment (DCT) has arisen as a promising green technology to modify the properties of metallic materials. Here we present a substantial (55%) improvement to the wear resistance of an Al-Mg-Si alloy using DCT without any deterioration of other mechanical properties. This improvement is attributed to a slight hardness increase resulting from multiscale microstructural modifications. DCT modifies the morphology of dispersoids as well as the organization and morphology of β’’ precipitates that increase their fraction (25%) at the expense of β’ precipitates. These effects are related to the greater nanoscale mobility and segregation of the alloying elements (Mg, Si) following DCT, resulting from lattice defect recombination. This research provides a fundamental breakthrough in understanding the DCT effect on aluminum alloys, confirming DCT as a feasible CO2-free treatment step towards improvement of aluminum alloys.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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