| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Journal of the American Ceramic Society Awards Symposium
|
| Presentation Title |
Micromechanics of Machining and Wear in Hard and Brittle Materials |
| Author(s) |
Brian R Lawn, Oscar Borrero-Lopez, Han Huang, Yu Zhang |
| On-Site Speaker (Planned) |
Yu Zhang |
| Abstract Scope |
Hard and brittle solids with covalent/ionic bonding are used in a wide range of modern-day manufacturing technologies. Optimization of a shaping process can shorten manufacturing time and cost of component production, while extending component longevity. The same process can contribute to wear and fatigue degradation in service. Educated development of advanced finishing protocols for this class of solids requires a comprehensive understanding of damage mechanisms at small-scale contacts from a materials perspective. Here, we present basic science of deformation and removal modes pertinent to contact events in the context of brittle and ductile machining as well as severe and mild wear. Essentials of brittle–ductile transitions in micro- and nano-indentation fields are outlined, with distinctions between blunt and sharp contacts, axial and sliding loading, and brittle and quasiplastic materials. The central role of microstructure in damage modes and material removal mechanisms is highlighted. Pathways to future research—experimental, analytical, and computational—are indicated. |