Microstructure and mechanical properties of high-pressure-assisted solidification of in situ AlMg2Si composites

Tong, X, Zhang, D, Wang, K, Lin, J, Liu, Y, Shi, Z, Li, Y, Lin, J and Wen, C 2018, 'Microstructure and mechanical properties of high-pressure-assisted solidification of in situ AlMg2Si composites', Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing, vol. 733, pp. 9-15.


Document type: Journal Article
Collection: Journal Articles

Title Microstructure and mechanical properties of high-pressure-assisted solidification of in situ AlMg2Si composites
Author(s) Tong, X
Zhang, D
Wang, K
Lin, J
Liu, Y
Shi, Z
Li, Y
Lin, J
Wen, C
Year 2018
Journal name Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
Volume number 733
Start page 9
End page 15
Total pages 7
Publisher Elsevier BV
Abstract In this study, an AlMg2Si composite was solidified under a high pressure of 3 GPa and the effects on microstructural evolution, mechanical properties including hardness, friction, and wear behavior, and compression properties were investigated. The results indicate that the composite solidified under high pressure exhibited significantly enhanced hardness, compressive properties, wear, and friction resistance compared to the as-cast and solid solutiontreated (ST) composites. The hardness of the composites under high-pressure solidification was 2.25 times and 1.37 times those of the as-cast and ST composites, respectively. The compressive yield strength, elastic modulus, and compressive strain were 121.5 MPa, 29.6 GPa, and 22.3% for the as-cast composite, 146.1 MPa, 44.5 GPa, and 35.8% for the ST composite, and 151.3 MPa, 49.3 GPa, and > 75% for the high-pressure-solidified composite, respectively. The friction coefficient of the composite under high-pressure solidification was only 44% of that of the as-cast composite and 67% of that of the ST composite. The wear modes were adhesive wear and abrasive wear for the as-cast composite, but only abrasive wear for the composite solidified under high pressure; the fracture mode transformed from cleavage fractures in the as-cast composite to quasi-cleavage fractures in the composite solidified under high pressure.
Subject Aerospace Materials
Automotive Engineering Materials
Composite and Hybrid Materials
Keyword(s) AlMg2Si composites
Friction and wear behavior
High-pressure solidification
Mechanical properties
Microstructure
DOI - identifier 10.1016/j.msea.2018.07.032
Copyright notice © 2018 Elsevier B.V. All rights reserved.
ISSN 0921-5093
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