Excellent plasticity of a new Ti-based metallic glass matrix composite upon dynamic loading
作者： R.F. Wu , Z.M. Jiao , Y.S. Wang , Z. Wang , Z.H. Wang
DOI: 10.1016/J.MSEA.2016.09.057
关键词: Flow stress 、 Plasticity 、 Softening 、 Dynamic range compression 、 Composite number 、 Materials science 、 Dynamic loading 、 Amorphous metal 、 Composite material 、 Flexural strength 、 Mechanical engineering 、 General Materials Science 、 Mechanics of Materials 、 Condensed matter physics
摘要: Abstract Quasi-static and dynamic compressive properties of in-situ Ti 60 Zr 14 V 12 Cu 4 Be 10 bulk metallic glass matrix composites containing ductile dendrites were investigated. Upon quasi-static loading, the composite exhibits a high fracture strength ~2,600 MPa, combined with considerable plasticity ~40% at room temperature. However, upon an excellent ~16% can be obtained due to abundant dislocations severe lattice distortions within multiplication shear bands analyzed by transmission-electron microscopy. A constitutive relationship is Johnson-Cook model, which employed model flow stress behavior. In addition, under compression, adiabatic temperature rise increases increasing strain rates, resulting in that softening effect obviously enhanced during deformation.
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