Augmented mechanical properties of magnesium AZ91 reinforced with graphene

Abstract

Graphene has been impressing us in recent years by boasting some very spectacular things. Its outstanding mechanical properties made the material to be used in composites for amplifying the strength. Mechanical properties usually take precedence for magnesium alloy when it would be used as a structure material. The main focus of this project is to manufacture magnesium reinforced metal matrix composites using graphene nano powder through stir casting to enhance the mechanical properties. The uniform distribution of graphene nano powder and its large specific surface area per volume is embedded in magnesium matrix leads to increase in micro hardness, tensile solidity, fracture exertion of the composite. Compared with standard single crystal magnesium, the Mg AZ91 with 0.3 and 0.7 wt % graphene nano powder composite indicates improvement in mechanical properties. In addition to standard procedures for the tests and dissection of mechanical properties of synthesized composite, de-wintor invertor trinocular metallurgical microscopy, is used to investigate the phase segmentation, grain size and phase contrast. Additionally, Mechanical properties of synthesized composites of two different composition of graphene were compared.

Comprehensive Study on the Properties of AZ91/x-Si3N4 Composites for Their Prospective Application

“…In other words, the hardness and elongation are related to the strength of the composites. The percentage elongation in this study is consistent with previous publications [5,6].…”

“…It is noteworthy that materials with higher strength also tend to have higher hardness. The strength values obtained in this study are comparable to earlier findings [5,6]. The increase in strength of the composites can be attributed to the presence of hard reinforcement particles.…”

“…Li et al [6] fabricated an AZ91/CNT composite by a powder metallurgy technique and described an improvement in the strength and elongation. A Mg (AZ91) alloy reinforced with a graphene nanopowder composite showed an enhancement in mechanical properties [5]. Ramanujan et al [15] and Junliu Ye et al [16] studied a AZ31 alloy reinforced with eggshell particulates and Ti particles and discussed various mechanical properties such as the Young's modulus, impact strength, elongation, wear behavior, etc.…”