Abstract
Abstract
Deformation-induced rejuvenation is a promising strategy to improve the macroscopic plasticity of metallic glasses (MGs). Here, molecular dynamics simulations are performed to investigate the rejuvenated MGs’ atomic structure and mechanical behavior with high-pressure torsion (HPT) processing. The HPT induces the formation of soft and hard regions in MGs, which dramatically improves the microstructural heterogeneity. Potential energy, pair distribution function, short-range order, medium-range order, and vibrational behavior in HPT-deformed MGs are characterized. The microstructure of soft regions similar to the configuration slightly above the glass transition temperature can be adjusted by torsion angle, ultimately controlling the transformation of MGs from brittleness to ductility. These findings provide valuable guidelines for the design of MGs with enhanced deformability.
Funder
Hundred-Talent Program of Hebei Province
Natural Science Foundation for Excellent Young Scholars of Hebei Province
National Natural Science Foundation of China
Key R&D Program of China
Science and Technology Plan of Colleges and Universities of Education Department of Hebei Province
Subject
Computer Science Applications,Mechanics of Materials,Condensed Matter Physics,General Materials Science,Modeling and Simulation
Cited by
5 articles.
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