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research-article

On microstructure and wear behavior of microwave processed composite clad

[+] Author and Article Information
Sarbjeet Kaushal

Mechanical Engineering Department, Thapar University, Patiala, 147001, India
sarbjeet.kaushal@thapar.edu

Dheeraj Gupta

Mechanical Engineering Department, Thapar University, Patiala, 147001, India
dheeraj.gupta@thapar.edu

Hiralal Bhowmick

Mechanical Engineering Department, Thapar University, Patiala, 147001, India
hiralal.bhowmick@thapar.edu

1Corresponding author.

ASME doi:10.1115/1.4035844 History: Received December 09, 2016; Revised January 15, 2017

Abstract

In the present study, wear resistance composite cladding of Ni based + 20% WC8Co (wt %) was developed on SS-304 substrate using domestic microwave oven at 2.45 GHz and 900 W. The clad was developed within 300 s of microwave exposure using microwave hybrid heating technique. The clad was characterized through scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD),Vicker's micro-hardness and dry sliding wear test. Microstructure study revealed that the clad of approximately 1.25 mm thickness was developed by partial mutual diffusion with substrate. It was observed that the developed clad was free from visible interfacial cracks with significantly less porosity (~1.2%). XRD patterns of the clad confirmed the presence of Cr23C6, NiSi and NiCr phases that eventually contributed to enhancement in clad micro-hardness. Vicker's micro-hardness of the processed clad surface was found to be 840 ± 20 HV, which was four times that of SS-304 substrate. In case of clad surface, wear mainly occurs due to debonding of carbide particles from the matrix while plastic deformation and strong abrasion are responsible for removal of material from SS-304 substrate.

Copyright (c) 2017 by ASME
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