About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Functional and Structural Thin Films and Coatings & Honorary Palkowski Session
|
Presentation Title |
Enhancing Cutting Performance for Difficult-to-cut Workpiece by Oxide Hard Coating |
Author(s) |
Joonbong Lee, Ki Buem Kim, Taekjib Choi |
On-Site Speaker (Planned) |
Joonbong Lee |
Abstract Scope |
Advanced cutting tools for difficult-to-cut workpiece materials (i.e. titanium alloy) need long life time to require higher accurate process and lower production cost. Hard coating layers, consisted of metal-nitride, oxide and carbide, can be adopted to improve their cutting performances and wear resistance. During cutting process, the tools with only nitride hard coating layer occurs uncontrollable oxidation layer and internal thermal stress which can be caused poor life time issues. In order to improve coating properties, nano-crystalline oxide heterostructure is conducted on tungsten carbide based cutting tools. Furthermore, nano-laminated structures which consisted of mechanical enhancement oxide layer (Hf, Zr and Al based oxide) and functional oxide layer (V, Bi and Ti) can relieve internal stress on hard coating layer. They can improve mechanical properties of hardness, which are compressive macrostress generated during its growth, plastic deformation induced by dislocation, nanostructure of materials, and cohesive forces between atoms of neighboring grains. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Surface Modification and Coatings, Thin Films and Interfaces |