Experimental investigation on Mechanical tribological and machining Behavior of friction stir processed az91 Magnesium based metal matrix Composites

Abstract

Generally, weight reduction is one of the major concerns and newlineoperating condition of the material is another important concern for increasing newlinethe demand for newer materials. In the last two decades, the usage of newlinemagnesium alloys has been getting increased widely, in order to enhance the newlinequality of the engineering applications in the fields of aerospace, automobile, newlinestructural and defense. Magnesium is one of the lightest materials with a newlinedensity of 1.74 g/cm3. This is comparatively 78% weight less than steel and newline35% weight less than aluminium. The applications of magnesium and its newlinealloys are limited because of their poor surface properties. Besides, most of newlinethe failure arises from the surfaces of the materials which reduces the newlinemechanical and wear characteristics. The poor surface properties of AZ91 newlinemagnesium alloys leads to many researchers developing appropriate surface newlinemodification through suitable manufacturing techniques. In this way, the newlineaddition of reinforcements (metal or non-metal) enrich the mechanical, wear, newlineand other properties of magnesium alloys. newlineMany of the industrial applications may not require bulk properties newlinemodification; so, the surface modification is required to upgrade their newlineproperties. Surface modification techniques such as physical modification newlinetechniques and chemical modification techniques have been used for the past newlineseveral years. In recent years, Friction Stir Processing (FSP) is used for newlinesurface modification and development of the surface composites. newline