Investigation on the Plasticity of Window Glasses at Room Temperature Using Vickers Microindentation and Single Point Diamond Turning

摘要

Mechanical processes involving material removal in brittle materials typically generate surface and sub-surface damage. In the case of the fabrication of optical components, it becomes essential that the process produce a damage free surface, since any surface damage may affect the performance of the component. In this work, Vickers micro-indentation and diamond turning of soda-lime-silicate (B270) preliminary tests were carried out. Results showed that this material presents restrict plasticity both for small indentation loads and for sub-micron cutting conditions. Ductile mode material removal took place at particular depths of cut and feed-rates.