The Self-Organized Critical Behavior in Pd-based Bulk Metallic Glass
AbstractBulk metallic glasses (BMGs) deform irreversibly through shear banding manifested as serrated-flow behavior during compressive tests. The strain-rate-dependent plasticity under uniaxial compression at the strain rates of 2 × 10−2, 2 × 10−3, and 2 × 10−4·s−1 in a Pd-based BMG is investigated. The serrated flow behavior is not observed in the stress-strain curve at the strain rate of 2 × 10−2·s−1. However, the medial state occurs at the strain rates of 2 × 10−3·s−1, and eventually the self-organized critical (SOC) behavior appears at the strain rate of 2 × 10−4·s−1. The distribution of the elastic energy density shows a power-law distribution with the power-law exponent of −2.76, suggesting that the SOC behavior appears. In addition, the cumulative probability is well approximated by a power-law distribution function with the power-law exponent of 0.22 at the strain rate of 2 × 10−4·s−1. The values of the goodness of fit are 0.95 and 0.99 at the strain rates of 2 × 10−3 and 2 × 10−4·s−1, respectively. The transition of the dynamic serrated flows of BMGs is from non-serrated flow to an intermediate state and finally to the SOC state with decreasing the strain rates. View Full-Text
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Wang, Z.; Li, J.; Zhang, W.; Qiao, J.; Wang, B. The Self-Organized Critical Behavior in Pd-based Bulk Metallic Glass. Metals 2015, 5, 1188-1196.
Wang Z, Li J, Zhang W, Qiao J, Wang B. The Self-Organized Critical Behavior in Pd-based Bulk Metallic Glass. Metals. 2015; 5(3):1188-1196.Chicago/Turabian Style
Wang, Zhong; Li, Jiaojiao; Zhang, Wei; Qiao, Junwei; Wang, Baocheng. 2015. "The Self-Organized Critical Behavior in Pd-based Bulk Metallic Glass." Metals 5, no. 3: 1188-1196.