Microstructural evolution in WC-Co cermet reinforced - A17075 metal matrix composites by stir casting

International Conference on Advances in Materials and Manufacturing Applications 2016

Gopal Krishna, U.B.^1 ; Ranganatha, P.^1 ; Auradi, V.^1 ; Mahendra Kumar, S.^2 ; Vasudeva, B.^1

RandD Centre, Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka

572103, India^1

RandD Centre, Department of Mechanical Engineering RV, College of Engineering, Bangalore, Karnataka

560059, India^2

关键词: Aluminium metal matrix composites;    Enhanced properties;    Grinding media;    High strength;    Micro-structural characterization;    Uniform distribution;    WC-Co cermets;    X-ray diffraction studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012090/pdf
DOI  :  10.1088/1757-899X/149/1/012090

来源: IOP

【 摘 要 】

Aluminium metal matrix composites (AMMCs) are preferred because of their enhanced properties like high strength to weight ratio, stiffness and wear resistance. In the present work, an attempt is made to develop cermet (WC-Co) reinforced with Al7075 metal matrix composite by stir casting technique. WC-Co cermet is reduced to an average size of 10μm through ball milling using Alumina as grinding media. Ball milled WC-Co Cermet in an amount of 6 wt. % is used as reinforcement in Al7075 matrix. Microstructural characterization of the prepared composites is carried out using SEM/EDX and XRD studies. X-ray diffraction studies have revealed the peaks corresponding to α-Al, WC, Co and minor Al5W phases. SEM/EDX characterization revealed the uniform distribution of cermet in Al matrix. Further studies also revealed that, addition of WC-Co cermet to Al7075 matrix has resulted in improvement in hardness and Densities of Al7075 matrix.