Abstract
The influence of particle shape, orientation, and volume fractions, as well as loading conditions, on the mechanical behavior of Ta particles reinforced with bulk metallic glass matrix composite is investigated in this work. A Matlab program is developed to output the MSC.Patran Command Language (PCL) in order to generate automatically two-dimensional (2D) micromechanical finite element (FE) models, in which particle shapes, locations, orientations, and dimensions are determined through a few random number generators. With the help of the user-defined material subroutine (UMAT) in ABAQUS, an implicit numerical method based on the free volume model has been implemented to describe the mechanical response of bulk metallic glass. A series of computational experiments are performed to study the influence of particle shapes, orientations, volume fractions, and loading conditions of the representative volume cell (RVC) on its composite mechanical properties.
Highlights
Bulk metallic glass (BMG) as an amorphous alloy has attracted much attention due to its extreme high strengths, superior elastic limits, etc. [1]
Unlike pure BMGs, the second reinforced phase can block the propagation of the main shear band and generate a few of minor shear deformation zone, which can make the plastic deformation be distributed widely instead of the localization that is seen in pure BMGs [9,10]
We study the influence of the microstructures and loading conditions on the mechanical properties of metallic glass matrix composites (MGMCs) through the periodic boundary conditions, which are realized with a multi-point constraint subroutine MPC in ABAQUS
Summary
Bulk metallic glass (BMG) as an amorphous alloy has attracted much attention due to its extreme high strengths, superior elastic limits, etc. [1]. The macroscopic response of MGMCs is some kind of statistical average of the microstructural factors, such as particle volume fraction, shape, orientation, and spatial spacing, as well as interface strength and residual stress, etc. It is extremely expensive and time-consuming, Appl. Abdeljawad et al applied a two-dimensional (2D) phase-field model to examine the effects of BMG composite microstructures, e.g., the area fraction and the characteristic length scale of the ductile dendritic particles, on the mechanical properties of MGMCs [15]. A series of numerical studies are performed to analyze the influence of particle volume, shape, and orientation, as well as the loading conditions on the macroscopic stress–strain relationships and damage evolution in MGMCs
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