Prediction of fracture loci for Cu_47.5Zr_47.5Al₅

Due to the difficulty of preparing large bulk metallic glasses (BMGs) samples and expensive cost, there are few reports for the fracture loci of BMGs. We proposed a method of plotting fracture loci in the stress and strain spaces to reveal the law of fracture loci of BMGs in the wide stress triaxiality range. The fracture loci of Cu_47.5Zr_47.5Al₅ in stress and strain spaces were investigated by using the proposed method. The different shapes of fracture loci were found under tensile and compressive stress states_. Based on the fracture loci of Cu_47.5Zr_47.5Al₅, the plasticity of Cu_47.5Zr_47.5Al₅ is concentrated under special compressive states, such as uniaxial compression and balanced biaxial compression states. Additionally, stress triaxiality and Lode parameter largely affect the plasticity of BMGs.