Deformation and strengthening of SiC reinforced Al-MMCs during in-situ micro-pillar compression

This study investigates the deformation of Al-based metal matric composites (MMCs) under in-situ micro-pillar compression. Different sizes of SiC nanoparticles, namely 55 nm and 700 nm, were used as reinforcing medium in the MMCs. Such in-situ compression shows real time deformation of materials and...

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Bibliographic Details
Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 763; p. 138141
Main Authors Basak, A.K., Pramanik, A., Prakash, C.
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 19.08.2019
Elsevier BV
Subjects
Aluminum base alloys
Compression
Deformation
Edge dislocations
Metal matrix composites
Micro-pillar
MMC
Nanoparticles
Particulate composites
Shear bands
SiC
Stress-strain curves
Stress-strain relationships
Time compression
Work hardening
MMC
Compression
Micro-pillar
Deformation
SiC
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Summary:This study investigates the deformation of Al-based metal matric composites (MMCs) under in-situ micro-pillar compression. Different sizes of SiC nanoparticles, namely 55 nm and 700 nm, were used as reinforcing medium in the MMCs. Such in-situ compression shows real time deformation of materials and helps to correlate materials’ response with corresponding stress-strain curves. It was shown that, MMCs exhibit higher yield strength compared to monolithic Al, thanks to effective load bearing among reinforcement and matrix. Whereas monolithic Al experience substantial work hardening, MMCs experience blocking of dislocations and slip/shear bands by the presence of reinforcing nanoparticle. These gives rise superior strength on MMCs compared to monolithic Al6061 alloy, which is about two times higher.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.138141