Title: Surface and subsurface deformation characteristics of cemented tungsten carbide under nanoscratching
Authors: Rudy Irwan; Han Huang
Addresses: School of Mechanical and Mining Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia ' School of Mechanical and Mining Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia
Abstract: Surface and subsurface deformation characteristics of cemented tungsten carbide during nanoscratching were systematically investigated. Nanoscratch tests were performed at various normal loads and different scratch velocities and the surface and subsurface after scratching were examined using scanning electron microscopy. The results indicated that the deformation of cemented tungsten carbide was significantly influenced by the microstructure of the material. The deformation of subsurface structure was caused by combination of plastic deformation of cobalt binders, relocation of tungsten carbide grains, fractures and chipping.
Keywords: surface deformation; subsurface deformation; cemented tungsten carbide; nanoscratching; microstructure; fracture mechanisms; nanotechnology; nanoscratch tests; plastic deformation; cobalt binders; grain relocation; fracture; chipping.
International Journal of Surface Science and Engineering, 2013 Vol.7 No.2, pp.122 - 134
Received: 15 Mar 2012
Accepted: 14 May 2012
Published online: 05 May 2013 *