Aluminum metal matrix composites were used in various fields such as
aircraft, underwater, automobile, aerospace. Several fabrication techniques
were used for the production of these composites. Among the various methods,
the powder metallurgy route provides dimensional accuracy and high
production rates. In this paper, metal matrix composites that include 7075
aluminum alloy chips and Al2O3 particles were produced by using a hot
pressing. The effect of reinforcement amount and T6 heat treatment on the
mechanical and wear properties of the composites were investigated. Al2O3
particles were added by weight of 5, 10 and 15 % and the composites were
produced by hot pressing. T6 heat treatment consisted of a solution
treatment at 480?C for 2 h and artificially aging process at 120?C for 24
h. Wear resistance of the composites was determined by a ball-on-disc dry
sliding wear test. Brinell Hardness of the composites tended to increase
with the increasing Al2O3 reinforcement up to 10 wt.% and with T6 treating.
Particle reinforcement improved the wear resistance up to 10 wt.% Al2O3. In
addition, volumetric material loss tended to decrease after the aging
process.
Cold metal transfer (CMT) welding provides many advantages for welding of dissimilar materials and thin sheets with its superior heat input control mechanism. In this study, AA6061 and AA7075 aluminum alloys were joined with CMT welding. The effect of welding parameters on hardness, tensile strength, and corrosion rate was investigated. The Tafel extrapolation method was carried out to determine the corrosion rates of AA6061 and AA7075 base metals and AA6061–AA7075 joints. Increasing heat input was found to be detrimental for both mechanical properties and corrosion resistance. The outcomes showed that CMT welding produces adequate joints of AA6061–AA7075 in terms of mechanical properties and corrosion resistance, favorably with welding parameters that provide low heat input.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.