Abstract
Continuous carbon fiber reinforced magnesium alloy pieces in SMC Ti-6Al-4V shell have been fabricated using pressure infiltration. Similar temperatures (~700°C) for superplastic formation of the shell and melting of the alloy allow this to be done in one step. The quality of infiltration of the molten alloys is found to be proportional to load. A limiting parameter in increasing the infiltration pressure is the strength of the welded bonds. Structure, fracture parameters and mechanical properties are discussed.
Highlights
Lightweight composite materials have attractive properties and, are attractive for manufacturing of critical components and parts of aviation and space technology, power and transport devices
Despite the fact that it is traditionally believed that magnesium alloys have low corrosion and erosion resistance, which makes it difficult to use metal matrix composites (MMC) based on them, some sources show better corrosion resistance of magnesium alloys than aluminium ones [2, 3]
Magnesium alloys have one more feature - the low Young modulus, which is a drawback when using non-reinforced magnesium alloys, but being as part of MMC, magnesium alloys, have a damping ability and help to reduce the level of vibrations and noise that occur during operation of products
Summary
Lightweight composite materials have attractive properties and, are attractive for manufacturing of critical components and parts of aviation and space technology, power and transport devices. Magnesium and aluminium alloys are the most promising ones to be applied as matrix material. Low density of components and high strength of carbon fibers provide MMC with significant advantages over traditional titanium alloys [3, 4]. The choice of a particular magnesium alloy to produce a composite is due to the following factors: its strength, cast properties and good adhesion to carbon fiber. Liquid magnesium alloy itself does not wet carbon fibers either at atmospheric pressure or in low vacuum, and does not form a chemical bond with it. One can overcome this problem through use of magnesium alloy with moderate (8-10%) aluminum content. AZ91magnesium alloy is used as the matrix material in the present research
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