| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2020)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2020)
|
| Presentation Title |
Direct Measurement of Stiction/Friction Forces during Microscale Metal Forming Processes: Effects of Size and Surface Coatings |
| Author(s) |
Bin Zhang, Wen Jin Meng, Jennifer Hay, Kurt Johanns |
| On-Site Speaker (Planned) |
Bin Zhang |
| Abstract Scope |
Metal forming processes are characterized by large plastic strains undergone by workpiece materials to form desired shapes and significant relative motion between forming tools and formed materials. The latter makes the nature of this tribological contact critical, due to its significant influence on surface quality of formed parts, material flow, forming load, and tool life. Direct measurement of stiction/friction during microscale metal forming is challenging, and little data exist in the literature. We conducted in-situ compression molding experiments on single crystal Al using microscale cylindrical punches with varying diameters under dry conditions. Measured characteristic molding pressure exhibited a significant dependence on the punch diameter. Stiction/friction forces during the punch pull-out process were measured and analyzed, and their dependence on punch dimensions was examined. Effects of thin ceramic coating on stiction/friction forces were also investigated. Our direct measurement of stiction/friction forces shed light on tribological contact during microscale metal forming processes. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |