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Nanoindentation and cavitation-induced fragmentation study of primary Al3Zr intermetallics formed in al alloys

Nanoindentation and cavitation-induced fragmentation study of primary Al3Zr intermetallics formed in al alloys

Priyadarshi, Abhinav, Subroto, Tungky, Conte, Marcello, Pericleous, Koulis ORCID: 0000-0002-7426-9999, Eskin, Dmitry, Prentice, Paul and Tzanakis, Iakovos (2020) Nanoindentation and cavitation-induced fragmentation study of primary Al3Zr intermetallics formed in al alloys. In: Light Metals 2020. The Minerals, Metals & Materials Series (MMMS) . Springer, Cham, Switzerland, pp. 168-173. ISBN 978-3030364083 ISSN 2367-1181 (Print), 2367-1696 (Online) (doi:https://doi.org/10.1007/978-3-030-36408-3_23)

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Abstract

Mechanical properties of primary Al3Zr crystals and their in situ fragmentation behaviour under the influence of a single laser induced cavitation bubble have been investigated using nanoindentation and high-speed imaging techniques, respectively. Linear loading of 10 mN was applied to the intermetallics embedded in the Al matrix using a geometrically well-defined diamond nano-indenter to obtain the mechanical properties at room temperature conditions. Primary Al3Zr crystals were also extracted by dissolving the aluminium matrix of an Al-3wt% Zr alloy. The extracted primary crystals were also subjected to cavitation action in deionized water to image the fracture sequence in real time. Fragmentation of the studied intermetallics was recorded at 500,000 frames per second. Results showed that the intermetallic crystals fail by brittle fracture mode most likely due to the repeatedly-generated shock waves from the collapsing bubbles. The results were interpreted in terms of fracture mechanics using the nanoindentation results.

Item Type: Conference Proceedings
Title of Proceedings: Light Metals 2020
Uncontrolled Keywords: Ultrasonic melt treatment, Cavitation, Fragmentation, Intermetallic crystal, Nanoindentation, High-speed imaging
Subjects: Q Science > QA Mathematics
Faculty / Department / Research Group: Faculty of Liberal Arts & Sciences
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA)
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Faculty of Liberal Arts & Sciences > Department of Mathematical Sciences
Last Modified: 28 Feb 2020 10:55
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/26866

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