Abstract
A new material model based on dislocation dynamics was developed specifically for cold spraying (CS) under supersonic impact conditions. It can adequately capture the following four physical phenomena occurring within nanoseconds: (1) strain hardening, (2) normal-range strain rate hardening, (3) ultrahigh-strain-rate hardening, and (4) thermal softening/hardening. The parameters of the new material model for pure Ni were systematically determined by mathematical fitting. Moreover, a cold spray experiment focusing on a single Ni microparticle was carried out and the particle’s deformation was measured, which agreed well with the simulated one, thereby proving the high accuracy of this material model.
| Translated title of the contribution | Ultrahigh-Strain-Rate-Dependent Material Modeling and Experimental Observation for Studying Cold-Spray-Induced Extreme Plastic Deformation in Pure Nickel Particles |
|---|---|
| Original language | Japanese |
| Pages (from-to) | 121-126 |
| Number of pages | 6 |
| Journal | Journal of the Japan Society for Technology of Plasticity |
| Volume | 63 |
| Issue number | 740 |
| DOIs | |
| State | Published - 2022 |