ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Friction stir processing of squeeze cast A356 with surface compacted graphene nanoplatelets (GNPs) for the synthesis of metal matrix composites

Kumar, Ajay P and Madhu, H C and Pariyar, Abhishek and Perugu, Chandra S and Kailas, Satish V and Garg, Uma and Rohatgi, Pradeep (2020) Friction stir processing of squeeze cast A356 with surface compacted graphene nanoplatelets (GNPs) for the synthesis of metal matrix composites. In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 769 .

[img]
Preview
PDF
mat_sci_eng_str_mat_pro_mic_pro_769_2020.pdf - Published Version

Download (4MB) | Preview
Official URL: https://dx.doi.org/10.1016/j.msea.2019.138517

Abstract

Friction stir processing (FSP) was applied to graphene nanoplatelets (GNPs) physically compacted on the surface of squeeze cast A356 alloy to incorporate GNPs within the matrix and to improve its mechanical properties. Squeeze casting resulted in finer size silicon and intermetallic compounds in cast microstructure, and subsequently FSP further refined the microstructure of squeeze cast A356 alloy, and GNP reinforced A356 alloy. The finer Si particles, intermetallics and graphene dispersed in the matrix increased the yield and ultimate tensile strength of FSP squeeze cast A356 alloy compared to the results reported in prior literature for FSP A356 alloy. Eutectic Si needles have been converted to fine spherical particles during FSP and were uniformly distributed within the nugget zone. The crystallite size of GNPs which were physically adhered to the surface of squeeze cast alloy prior to FSP decreased after FSP as a result of deformation. Thus, a combination of squeeze casting, and friction stir processing and incorporation of GNPs reinforcement in the A356 matrix is a promising route to further improve its mechanical properties.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to ELSEVIER SCIENCE SA
Keywords: Metal-matrix composites (MMCs); Graphene; Mechanical properties; Microstructures; Fractography
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 01 Jan 2020 09:02
Last Modified: 01 Jan 2020 09:02
URI: http://eprints.iisc.ac.in/id/eprint/64186

Actions (login required)

View Item View Item