Experimental investigation of Aluminium Matrix Composite production and joining

Abstract

Abstract The process of production and joining of traditional materials is well established however a lot more research is needed in the field of composite materials. Generally, by conventional methods, the probability of producing a blemish metal matrix composite (MMC) is high which is undesirous. Hence, the prime challenges are the production of a defect-free MMC and joining them with welding process of high-quality. From the literature of the casting of MMC, the stir casting whereas for a high-quality weld, the friction-stir welding (FSW) is advantageous and hence implemented in the current study. The experimental investigation carried out was divided into different categories as follows: 1) Fabrication of AA7075/TiB2 2) Welding of AA7075/TiB2 by FSW 3) Studying the microstructure and mechanical properties of the weld joint and 4) analyzing the effects of process parameters like tool rotational speed, welding speed and tilt angle on microstructure and mechanical properties on a 6mm thick AA7075/TiB2 FSW joint. The TiB2 particles obtained successfully by the in-situ reaction of inorganic salts K2TIF6 and KBF4 with molten aluminium matrix. The results of this investigation yield a defect-free cast and weld of AA7075/TiB2 FSW joint with improved mechanical properties. All the process parameters were analyzed.