[S5] S5 Multi-scale analysis of elementary processes in plasticity(IX)

4:10 PM - 4:30 PM JST(7:10 AM - 7:30 AM UTC)

[S5.11] Onset condition and Dominant Factors of Negative Strain-Rate Sensitivity in Metallic Glasses

○Tomoaki Niiyama¹, Akio Ishii², Takahiro Hatano², Tomotsugu Shimokawa¹, Shigenobu Ogata² (1. Kanazawa Univ., 2. Osaka Univ.)

Keywords:

metallic glasses,strain-rate sensitivity,kinetic Monte Carlo simulation

We reproduced negative strain-rate sensitivity in metallic glasses using STZ-based coarse-grained kMC simulations incorporating a KWW-type activation barrier. We constructed a theoretical model that identifies the dominant factors and reveals the onset condition of the sensitivity.