Novel investigation on tribological behavior of microwave synthesized functionally graded claddings. (April 2022)

• Record Type: Journal Article
• Authors: Kaushal, Sarbjeet; Gupta, Dheeraj; Bhowmick, Hiralal
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 236:Number 8(2022)
• Page Start: 4336
• Page End: 4345
• Publication Date: 2022-04
• Subjects: Microwave cladding -- functionally graded materials -- dry sliding wear -- fractography; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/09544062211045892
• Languages: English
• ISSNs: 0954-4062

Abstract

In this study, functional performance of Ni/Cr3 C2 functionally graded claddings (FGCs) was investigated under dry sliding wear environment. The Ni/Cr3 C2 -based FGCs were produced by varying Cr3 C2 fraction (Ni-XCr3 C2 ) (X=10%–30% by weight) using microwave irradiation. The FGC layers were composed of cellular-structure with reinforced particles dispersed randomly inside Ni-based matrix. Variation of Cr3 C2 particles inside Ni matrix exhibited significant impact on micro-structural and mechanical properties. The microhardness profile of the FGC layers showed an increase in hardness value with an increase in the amount of reinforced Cr3 C2 particles. FGC top layers showed the maximum value of micro-hardness of 555 ± 34 HV. Functional performance of microwave processed FGCs was studied through the pin-on-disk tribometer under varying sliding velocity and sliding distances. For comprehension study, wear study was also carried out on microwave processed single layer clads with compositions corresponding to FGC layers. The FGC sample showed better wear resistance than all single clad layers and substrate material. The FGC sample exhibited 1.6 times less wear rate than the Ni-based + 30% Cr3 C2 single layer clad. The worn-out surfaces of FGC and single-layer-clads showed presence of multiples cracks and grooves, which resulted in their weight loss during dry sliding contact. Material debonding and the formation of craters and cracks are the main phenomena responsible for the wear loss in the FGC surface.