Effect of cooling rate on the mechanical properties of amorphous alloy: From the perspective of heterogeneity
Yezeng He, Jiaojiao Qin, Reza Behmadi, Nahid Hojati, Qi He, Changjiu Chen, Haishun Liu, Weiming Yang, Akbar Hojjati–Najafabadi
Abstract
Amorphous alloys have garnered attention for the unique disordered structure, exceptional properties and promising application potential. The cooling rate during preparation is crucial for shaping their structure and properties. This study primarily investigates the effects of cooling rates on the structural and mechanical heterogeneity of amorphous alloys. The results show that increasing the cooling rate leads to a decrease in the strain required to form shear bands, and the germination regions of shear bands usually have low relative elastic modulus. Additionally, the Spearman coefficient indicates a strong positive correlation between the reduced elastic modulus and the icosahedral structure. Moreover, as cooling rates increase, the alloy exhibits a concomitant increase in both structural and mechanical heterogeneity.