Fractographic and three body abrasion behaviour of Al-Garnet-C hybrid chill cast composites

International Conference on Materials, Alloys and Experimental Mechanics 2017

材料科学;金属学;机械制造

Bandekar, Nityanand^1 ; Anantha Prasad, M.G.^2

Department of Mechanical Engineering, SDM Institute of Technology, Ujire

574240, India^1

Department of Mechanical Engineering, Jyothy Institute of Technology, Bangalore, India^2

关键词: Carbon reinforcements;    Composite samples;    Fracture behaviour;    Hybrid composites;    Micro-structural characterization;    Three body abrasion;    Tribological behaviour;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/225/1/012290/pdf
DOI  :  10.1088/1757-899X/225/1/012290

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Fractographic and tribological behaviour of hybrid composite of aluminum alloy LM13 matrix with garnet and carbon was investigated. Conventional stir casting technique was used to fabricate the composites with chill cast technique. Various chill materials like Copper, Steel, Iron and Silicon carbide were used to improve the directional solidification. The garnet being added ranges from 3 to 12 wt-% in steps of 3wt-% and constant 3wt-% of carbon. The experiment evaluates the mechanical, fractographic and three body abrasion behaviour of the hybrid composites for various parameters of load, garnet and chills. Microstructural characterization of the composite samples revealed a uniform distribution of reinforcements with minimum clustering. SEM was used for examine worn surfaces. The addition of garnet and carbon reinforcement decreases the wear rate of hybrid composites. Fracture behaviour showed the changes from ductile mode to brittle mode of failure. Further, directional chilling with copper chill improves the wear resistance of the composites.