Abstract
Microstructures and element distribution at the interface between a worn tool surface and a residue of low carbon cutting steel, which was left behind and accumulated on the tool surface during its machining, were observed and analyzed by transmission electron microscopy (TEM) and laser-assisted three dimensional atom-probe tomography (LA3DAP). The residue of the machined steel was composed of fine ferrite grains a few hundred nanometers in size, which were considered to be a result of a grain refinement process by severe plastic deformation. Tungsten carbide (WC) particles embedded in the tool were sharply worn out at the interface, thus the interface was found to be flat and sharp in nanometers scale. Since the deposited steel on the worn tool surface was so tightly bound that the interface was successfully analyzed by LA3DAP in transverse direction. It was shown that tungsten atoms from the WC particles had diffused into the deposited steel with a distance of approximately 10 nm from the interface. It has been suggested that the tool wear upon machining low carbon cutting steels proceeds mainly by the diffusion of tool component elements into the deposited iron, in which accelerated diffusion occurs due to the fast diffusion paths created by severe plastic strains introduced during machining.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
