Abstract
In this paper an attempt has been made to review machining characteristics, tribological and corrosion behaviour of aluminum alloy 7075 hybrid composite utilizing different types of reinforcements. Many investigations revealed that application of various new techniques like friction stir processing, electric discharge machining and abrasive water jet machining are found to be the successful for enhancing the machining characteristics of hybrid composite. It was found in many researches that the introduction of hard ceramic phase with soft reinforcement phase into the matrix improves the tribological characteristics along with other mechanical properties. The corrosion rate was found to be higher for the composite with poor interface between matrix and reinforcement. Also, many researchers reported about the enhancement of corrosion resistance due to heat treatment, employing friction stir processing technique and optimized addition of reinforcement.
Highlights
In this review an attempt has been made by author to shed light on the various researches conducted on the machining characteristics, tribological and corrosion behaviour of AA 7075 hybrid composite
Many of the researchers used friction stir processing technique in order to achieve uniform dispersion of reinforcement particles in the matrix and ultra-fine equi axed grains. They were successful in achieving that at low tool travelling speed. Properties such as hardness and wear resistance were significantly improved after friction stir processing
Further the optimization of process parameter such as current, voltage, pulse on time and pulse off time was done and their effect on material removal rate, surface roughness and power consumption were analysed by using RSM technique
Summary
Alumnium alloy 7075 is one of the most popular alloys due to its excellent characteristic properties such as very high strength to weight ratio, good ductility, high toughness, low density, high thermal conductivity and good formability. The problem with this alloy is that they possess very poor wear resistance attributed to severe plastic deformation and material removal under different wear conditions. In this review an attempt has been made by author to shed light on the various researches conducted on the machining characteristics, tribological and corrosion behaviour of AA 7075 hybrid composite
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