Fundamental abrasive contact at high speeds: Scratch testing in experiment and simulation

The understanding and experimentation of abrasive wear mechanisms at high speeds is still poorly investigated in literature. This mainly due to a lack suitable, well-instrumented test rigs for fundamental, single events. Standard scratch tests, which are often utilized studies abrasion phenomena, operate the low-speed range up some mm/s, while applications suffering from exceeding 1 m/s (e.g., rolling, grinding, machining). Numerical approaches, especially particle-based methods, allow simulation such fast deformation processes, but rely on hardening models that require precise knowledge material parameters. Thus, Johnson-Cook model was parametrized using data high-speed compression tests pure aluminum. A series with increasing depths were then simulated Material Point Method (MPM). Experimentation done pendulum rig equipped Rockwell C diamond cone. By adjusting balance point swing arm ∼1 m length, velocity 6.8 achieved its tip as measured camera. Scratches several performed, their force signals acquired. Post-test analyses comprised topography measurements EBSD cross-sections scratches investigate microstructural changes event. Scratch topographies compared favorably between experiment extent strain significantly reduced experiments. calibration sensor successful now allows investigation new alloys determination parameters under conditions.