Issue |
Manufacturing Rev.
Volume 9, 2022
|
|
---|---|---|
Article Number | 5 | |
Number of page(s) | 12 | |
DOI | https://doi.org/10.1051/mfreview/2022005 | |
Published online | 07 February 2022 |
Research Article
Structural analysis, mechanical and damping behaviour of Al-Zn based composites reinforced with Cu and SiC particles
1
Materials Design and Structural Integrity Research Group, Department of Metallurgical and Materials Engineering, Federal University of Technology Akure, P.M.B. 704, Ondo State, Nigeria
2
Centre for Nanoengineering and Tribocorrosion, School of Mining, Metallurgy and Chemical Engineering, Faculty of Engineering & the Built Environment, University of Johannesburg, Johannesburg, South Africa
3
School of Chemical and Metallurgical Engineering and DSI-NRF Centre of Excellence in Strong Materials: all University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
4
African Academy of Sciences, P.O. Box 24916-00502, Nairobi, Kenya
* e-mail: kalanemek@yahoo.co.uk
Received:
6
August
2021
Accepted:
15
January
2022
The structural characteristics, mechanical and damping properties of stir-cast Al-10 wt.% Zn based composites developed using 6 and 8 wt.% Cu, and 8 wt.% SiC particles as reinforcements, were investigated. The low porosity (<4%), near absence of dissolved Cu in the Al-Zn matrix, and marginal presence of melt reaction-induced intermetallic phases, attest to the soundness of the castings. Besides hardness, the strength parameters − ultimate tensile strength (149.33 MPa and 138.64 MPa) and specific strength (54.3 MPa cm3 g−1 and 51.16 MPa cm3 g−1) − of the Al-Zn composites reinforced with 6 and 8 wt.% Cu, were superior to that of the unreinforced Al-Zn alloy (103.47 MPa) and the 8 wt.% SiC reinforced composite (130.5 MPa). The fracture toughness (17.32 MPa m1/2 and 13.66 MPa m1/2) and percentage elongation (15% and 12.5%) of the 6 and 8 wt.% Cu reinforced Al-Zn composites, also surpassed that reinforced with SiC (KIC − 12.28 MPa m1/2; % εf − 9.5%). Improved matrix/particles interphase bonding and the inherent ductile and tough nature of Cu over SiC, were cited responsible for the improved strength-ductility-toughness balance of the Al-Zn/Cu composites over that reinforced with SiC. The damping properties were generally temperature sensitive, with all compositions exhibiting increase in damping capacity at test temperatures 100–200 °C.
Key words: Al-Zn/Cup composite / interface bonding / metallic reinforcement / mechanical properties / damping capacity / microstructure
© K.K. Alaneme et al., Published by EDP Sciences 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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