Journal ArticleDOI
Processing, microstructure, and mechanical behavior of cast magnesium metal matrix composites
TLDR
In this article, a liquid mixing and casting process that can be used to produce SiC particulate-reinforced magnesium metal matrix composites via conventional foundry processes is presented.Abstract:
Magnesium metal matrix composites (MMCs) have been receiving attention in recent years as an attractive choice for aerospace and automotive applications because of their low density and superior specific properties. This article presents a liquid mixing and casting process that can be used to produce SiC particulate-reinforced magnesium metal matrix composites via conventional foundry processes. Microstructural features, such as SiC particle distribution, grain refinement, and particle/matrix interfacial reactions of the cast magnesium matrix composites, are investigated, and the effects of solidification-process parameters and matrix alloys (pure Mg and Mg-9 pct Al-1 pct Zn alloy AZ91) on the microstructure are established. The results of this work suggest that in the solidification processing of MMCs, it is important to optimize the process parameters both to avoid excessive interfacial reactions and simultaneously achieve wetting, so that a good particle distribution and interfacial bonding are obtained. The tensile properties, strain hardening, and fracture behavior of the AZ91/SiC composites are also studied and the results are compared with those of the unreinforced AZ91 alloy. The strengthening mechanisms for AZ91/SiC composite, based on the proposed SiC particle/matrix interaction during deformation, are used to explain the increased yield strength and elastic modulus of the composite over the magnesium matrix alloy. The low ductility found in the composites is due to the early appearance of localized damages, such as particle cracking, matrix cracking, and occasionally interface debonding, in the fracture process of the composite.read more
Citations
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Challenges and advances in nanocomposite processing techniques
TL;DR: In this article, the results from numerous studies on various methods for manufacturing nanocomposites with improved properties and retained nanostructures are discussed in detail in detail and recent advances are discussed.
Journal ArticleDOI
Properties and deformation behaviour of Mg–Y2O3 nanocomposites
TL;DR: In this paper, composite of Mg reinforced with 0.5, 1 and 2 vol.% of Y2O3 nanoparticles were fabricated using disintegrated melt deposition technique.
Journal ArticleDOI
Development of novel carbon nanotube reinforced magnesium nanocomposites using the powder metallurgy technique
TL;DR: In this paper, a carbon nanotube reinforced magnesium was synthesized using the powder metallurgy technique followed by hot extrusion and up to 0.3 wt% of CNTs were added as reinforcements.
Journal ArticleDOI
Development of high performance magnesium nano-composites using nano-Al2O3 as reinforcement
Syed Fida Hassan,Manoj Gupta +1 more
TL;DR: In this paper, the effect of presence of nano-Al2O3 as reinforcement and its increasing amount with the microstructural and mechanical properties of magnesium nano-composites was investigated.
Journal ArticleDOI
A Review on Mechanical and Tribological Behaviors of Stir Cast Aluminum Matrix Composites.
TL;DR: In this paper, a review on the mechanical and tribological properties of stir cast aluminum matrix composites containing single and multiple reinforcement is presented, which shows an increase in its tensile and yield strength.
References
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Journal ArticleDOI
Aspects of fracture in particulate reinforced metal matrix composites
TL;DR: In this article, the tensile deformation and fracture behavior of the aluminium alloy 6061 reinforced with SiC has been investigated, and it is suggested that macroscopic fracture is initiated by the SiC particle clusters that are present in these composites as a result of the processing.
Journal ArticleDOI
Solidification Processing Of Metal Matrix Composites
Andreas Mortensen,I. Jin +1 more
TL;DR: In this article, the basic physics of materials processes where a reinforcing phase is combined with bulk molten metal are reviewed, with a focus on thermodynamics, mechanics, and chemistry of wetting.
Journal ArticleDOI
Effects of heat treatment and reinforcement size
TL;DR: In this paper, the effects of heat-treatment, matrix microstructure, and reinforcement size on the evolution of damage, in the form of SiCp cracking, during uniaxial tension testing of an aluminum-alloy based composite have been determined.
Journal ArticleDOI
Particulate fracture during deformation of a spray formed metal-matrix composite
TL;DR: In this paper, the mechanisms of deformation and failure in a 2618 Al alloy reinforced with 15 vol pct SiC particilates were studied and compared with those of the unreinforced alloy, processed by spray forming as well.
Journal ArticleDOI
Processing-microstructure relationships in compocast magnesium/SiC
TL;DR: In this paper, the feasibility of the compocasting process applied to the AZ91 D magnesium alloy-SiC particles system was investigated, and three temperature-time processing sequences were investigated: stirring temperature maintained above liquidus; stirring temperature in the semi-solid temperature range; and lastly an imposed temperature rise above the liquidus after stirring in the mushy zone.