Metallic glasses(MGs)are promising structural materials with high strength,large elastic strain limit and enhanced wear resistance.On the way to tune the mechanical performance of MGs,numerous efforts have been devote...Metallic glasses(MGs)are promising structural materials with high strength,large elastic strain limit and enhanced wear resistance.On the way to tune the mechanical performance of MGs,numerous efforts have been devoted to investigating the effect of hydrostatic pressure(σh)on the mechanical properties and deformation mechanisms of MGs.The application of sufficiently large magnitudes ofσh to MGs has been considered a feasible way to improve strength and delocalize plastic deformation in MGs.In this paper,we review recent studies on pressure-dependent thermodynamic properties,mechanical strength and hardness,as well as elevated ductility of MGs due to the pressure-induced change of deformation and failure mechanisms.Observations of intriguing mechanical behaviors of MGs,and the corresponding theoretical modeling and atomistic understanding of plastic deformation in MGs under pure hydrostatic pressure and more general stress states are discussed.These findings not only deepen the understanding of pressure-dependent mechanical behaviors of MGs,but also point out the potential of tuning mechanical behaviors of MGs through stress engineering.展开更多
基金the financial support from the National Natural Science Foundation of China(12222210,12172324)Zhejiang University K.P.Chao’s High Technology Development Foundation,and computational support from the Super Cloud Computing Center in Beijing.
文摘Metallic glasses(MGs)are promising structural materials with high strength,large elastic strain limit and enhanced wear resistance.On the way to tune the mechanical performance of MGs,numerous efforts have been devoted to investigating the effect of hydrostatic pressure(σh)on the mechanical properties and deformation mechanisms of MGs.The application of sufficiently large magnitudes ofσh to MGs has been considered a feasible way to improve strength and delocalize plastic deformation in MGs.In this paper,we review recent studies on pressure-dependent thermodynamic properties,mechanical strength and hardness,as well as elevated ductility of MGs due to the pressure-induced change of deformation and failure mechanisms.Observations of intriguing mechanical behaviors of MGs,and the corresponding theoretical modeling and atomistic understanding of plastic deformation in MGs under pure hydrostatic pressure and more general stress states are discussed.These findings not only deepen the understanding of pressure-dependent mechanical behaviors of MGs,but also point out the potential of tuning mechanical behaviors of MGs through stress engineering.
