Digital Commons Network^™

Fabrication And Tribology Of Composite Coatings Incorporating Solid Lubricant Micro-Reservoirs, Canan Gamze Guleryuz

Doctoral Dissertations

The tribological behavior of composite coating incorporating solid lubricant reservoirs has been investigated in this study. A new method, termed " microbeading" was devised to create microscopic reservoirs on the surface of sputter-deposited hard coatings. Pin-on-disk tests were used to evaluate the lubricating performance of these newly devised composite coatings. Three sizes of the reservoirs were investigated: 1.5, 5 and 10 microm. The 10 microm-sized-reservoirs performed better in terms of reducing friction and extending wear life. These coatings were also evaluated with finite element models. It was found that during ball-coating surface interaction, the lowest stresses and calculated work done …

Milling Cutter Software Architecture For Force And Surface Finish Modeling, Cuneyt Yalcin

Doctoral Dissertations

The main goal of this dissertation is to pave the way towards a milling simulation software platform that enables academic modeling research to be easily incorporated into industrial practice. The most significant contribution is creation of numeric structures that enable utilization of any milling cutting force model with any type of milling cutting tool in a computationally efficient manner. Efficiency and accuracy of the force and surface finish modeling are the main focus of this study.

Force modeling is an important part of milling research since it is directly connected to tool health and workpiece quality. A number of force …