Evaluation of Microstructure, Hardness, and Tensile Properties: A Comparative Study of Stir Cast and Extruded Al7005/Glass-/Fly-Ash-Reinforced Hybrid MMCs

Praveen Kumar Swamy, Shantharaja Mylaraiah, Dadapeer Basheer, Samson Jerold Samuel Chelladurai
2021 Advances in Materials Science and Engineering  
The effect of extrusion ratio and addition of glass and fly ash on microstructural, mechanical properties, and fracture behavior of Al composites is examined. Both the composites and hybrid composites are prepared by the liquid metallurgical technique. Microstructure, extrusion effect on hardness, tensile properties, and fracture are studied using an optical micrograph, hardness tester, Universal Testing Machine, and scanning electron microscope, respectively. Experimental results show that
more » ... easing the extrusion ratio leads to a significant enhancement in mechanical properties such as tensile, compression, and yield strength and Young's modulus, but results in a small reduction of ductility. It has been revealed that the presence of glass and fly ash improve the mechanical properties significantly with a slight reduction in ductility compared to the Al alloy. Fracture behaviour of the base alloy and composites show intergranular ductile and brittle cleavage mode failure as observed by SEM.
doi:10.1155/2021/8601484 fatcat:btdsfrc7kfaldfyr2rndxfutae