Dendrite size dependence of tensile plasticity of in situ Ti-based metallic glass matrix composites

• Published in: Journal of alloys and compounds Vol. 583; pp. 593 - 597
• Main Authors: Zhang, T., Ye, H.Y., Shi, J.Y., Yang, H.J., Qiao, J.W.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 2014; Elsevier
• Subjects: Alloys; Amorphous materials; Applied sciences; Bulk amorphous materials; Dendritic structure; Ductility; Elasticity. Plasticity; Evolution; Exact sciences and technology; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metallic glasses; Metals. Metallurgy; Particulate composites; Plastic deformation; Tensile deformation; Titanium; Tensile deformation; Bulk amorphous materials; Plastic deformation; Metal matrix composite; Ductility; Tensile property; Titanium base alloys; Composite material; Dendrite; Dislocation; Metallic glasses; Transition metal alloy; Plasticity; Microstructure; Shear band
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.08.201

•The three composites showed better tensile strength than conventional Ti alloys.•The deformation behavior was divided into three stages, each stage was discussed.•Relations of dendrite size and plasticity was described by an inverted U-shaped curve.•Deformation micromechanisms focus on evolution of dislocations and shear bands.
Three Ti-based metallic glass matrix composites (MGMCs) with different sizes of dendrites exhibit excellent mechanical properties. Different sizes of dendrites lead to different tensile properties, the size of dendrites plays an important role in gaining the tensile ductility of the in situ MGMCs. The dependences of the ductility and the size of the dendrites in the in situ MGMCs can be illustrated by an inverted U-shaped curves. The tensile deformation behavior of the present composites is classified into three stages, each stage and effects of the changed sizes of dendrites are investigated by focusing on the evolution of dislocations in dendrites and shear bands in amorphous matrix.