Tensile plasticity with enhanced β-relaxation in high-energy metallic glass wires

Herein, uniform high-quality Fe-, Ni-, and Co-based metallic glass wires (MGWs) were successfully synthesized by the Taylor-Uitovsky method. The MGWs exhibited universal and enhanced beta-relaxation and a higher-energy state compared with conventional MGs with the same composition, which can be regarded as highly rejuvenated MGs. Notably, the enhancement of the energy tuning rate of MGWs was 216.38%, which is the highest value obtained from various methods. It was found that the enhanced beta-relaxation was related to the high energy induced by structural heterogeneities, which resulted in excellent mechanical properties such as improved fracture strength of 3240 MPa and large tensile plastic strain of 1.7%. This work offers new insights into overcoming the tradeoff between strength and tensile plasticity in the MG family through the preparation of high-energy MGs via beta-relaxation.

Automated summary

Uniform high-quality Fe-, Ni-, and Co-based metallic glass wires (MGWs) were synthesized successfully by the Taylor-Uitovsky method. These MGWs exhibited universal and enhanced beta-relaxation and a higher-energy state, resulting in excellent mechanical properties.