26 citations · 65 across the 4 of their papers we have counts for
4 papers
Negative Strain-Rate Sensitivity in Metallic Glasses Driven by Rejuvenation-Relaxation Competition: Kinetic Monte Carlo Simulations and a Minimal Effective Model
Tomoaki Niiyama, Akio Ishii, Takahiro Hatano +2
When strain-rate sensitivity (SRS) is negative in metallic glasses, the material becomes weaker as the deformation rate increases, leading to accelerated plastic deformation and, e…
Structural relaxation affecting shear transformation avalanches in metallic glasses
Tomoaki Niiyama, Masato Wakeda, Tomotsugu Shimokawa +1
Avalanche behaviors, characterized by power-law statistics and structural relaxation that induces shear localization in amorphous plasticity, play an essential role in deciding the…
Barrier effect of grain boundaries on the avalanche propagation of polycrystalline plasticity
Tomoaki Niiyama, Tomotsugu Shimokawa
To investigate the barrier effect of grain boundaries on the propagation of avalanche-like plasticity at the atomic-scale, we perform three-dimensional molecular dynamics simulatio…
Atomistic mechanisms of intermittent plasticity in metals: Dislocation avalanches and defect cluster pinning
Niiyama Tomoaki, Shimokawa Tomotsugu
Intermittent plastic deformation in crystals with power-law behaviors has been reported in previous experimental studies. The power-law behavior is reminiscent of self-organized cr…