Effect of T7 heat treatment on the dry sliding friction and wear properties of the SiC-reinforced AA 2014 aluminium matrix composites produced by vacuum infiltration

Abstract

Dry sliding wear properties of SiC-reinforced AA 2014 aluminium matrix composites produced by vacuum infiltration method were investigated using a pin-on-disc test machine after examining their microstructural and mechanical properties. It was observed that the porosity of the composites decreased with increasing volume ratio up to 2% SiC; above this level, porosity of the composites reached almost constant levels. The hardness of the composites increased continuously with increasing SiC content. It was observed that T7 heat treatment increased the wear resistance and removed the dendritic structure of the produced composites. The highest wear resistance was obtained from AA 2014-2%SiC composite both as-cast and heat-treated conditions. Wear resistance of the composites tested was observed to be strongly dependent on their porosity rather than their other properties.

The Effects of B4C Amount on Hardness and Wear Behaviours of 7075-B4C Composites Produced by Powder Metallurgy Method

“…In these studies, various carbides and oxides (such as SiC, Al 2 O 3 B 4 C, TiC, AlN, TiN, Al 4 C 3 ) have been used as reinforcement phase [10][11][12][13]. Some recent studies used B 4 C as reinforcement phase due to its low density and higher hardness compared to SiC and Al 2 O 3 [10,14,15]. In metal matrix composite production, the reinforcement phase is done using the casting or the powder metallurgy method.…”

“…There are many recent studies that used 7XXX Al alloys as matrix material, which have the highest resistance among all Al alloys [1,[7][8][9]. In these studies, various carbides and oxides (such as SiC, Al 2 O 3 B 4 C, TiC, AlN, TiN, Al 4 C 3 ) have been used as reinforcement phase [10][11][12][13]. Some recent studies used B 4 C as reinforcement phase due to its low density and higher hardness compared to SiC and Al 2 O 3 [10,14,15].…”

Corrosion Behaviour and Electrical Conductivity of Reinforced TiAl3and B4C Hybrid Aluminium Composites

“…However, it is rather difficult to bring those properties in monolithic materials. In order to solve this problem, researchers usually benefit from various reinforcement materials so as to introduce new material systems as a solution [4][5][6][7]. Al 2 O 3 and SiC are the most common reinforcement elements used in the production of particle reinforced composites.…”

An Investigation of Abrasive Wear Behaviour of Al 2014-SiC Composites

“…Composite materials with high levels of resistance are commonly used in different fields of engineering. Composites with Al matrix are manufactured with different techniques such as molding, compression molding, infiltration and powder metallurgy [6,7]. However, one of the possible problems with the molding is that the reinforcing components may only partially mix in the matrix or not at all.…”