Effect of Hot Extrusion through Mathematically Contoured Die on Mechanical and Tribological Characteristics of the AMC Prepared through P/M Route

3rd International Conference on Materials and Manufacturing Engineering 2018

Kumar Mohapatra, Sambit^1 ; Maity, Kalipada^2 ; Ghadei, Sataya Brata^3 ; Khan, Akhtar^2

School of Mechanical Engineering, KIIT University, Odisha, Bhubaneswar

751024, India^1

Department of Mechanical Engineering, NIT Rourkela, Odisha

769008, India^2

Mahindra and Mahindra Ltd., Tamil Nadu

603004, India^3

关键词: Aluminium matrix composites;    Cold compaction;    Comparative analysis;    Cosine die;    Density distributions;    Secondary processing;    Tribological characteristics;    Tribological properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/390/1/012008/pdf
DOI  :  10.1088/1757-899X/390/1/012008

来源: IOP

【 摘 要 】

Thermo mechanical treatment of the components prepared by powder metallurgy route instigates the extensive research, due to its ameliorated impacts on the properties. In this research aluminium matrix composites (AMCs) {Al (92)-Mg (5) +Gr (1) + Zn (2)} have been prepared by following powder metallurgy route with dual axial cold compaction and subsequent sintering. Hot extrusion was considered as the secondary processing operation for the AMCs. Mathematical contoured die was utilised for the extrusion to avoid severe surface defects. Comparative analysis of different mechanical as well as tribological properties of the specimen before and after extrusion was focused. Extrusion engenders significant amount of improvements of the properties those are attributed to excellent bond strength and uniform density distribution due to high compressive stress. To furnish the suitable explanation scanning electron microscopies have been performed for the wear surfaces.