A Numerical Simulation of a Ni-based Bulk Metallic Glass During Compressive Deformation and Fracture

Liang Weizhong,Ning Zhiliang,An Yongliang,Liu Ailian

doi:10.1590/1516-1439.322014

Abstract

On the basis of compression tests, uni-axial compression deformation and fracture behaviors of NiTiZrAlCuSi bulk metallic glass samples with different dimensions have been studied by numerical simulation approaches. Finite element models for compression simulation have been developed using ABAQUS software. Shear damage models were employed to reproduce the compression deformation and fracture process of the Ni-based amorphous alloys. Mises stress distribution and equivalent plastic strain obtained numerically during compression were analyzed. The simulation results were consistent with those of the compression experiment tests. The smaller of the samples exhibited larger plasticity and higher fracture strength when compared with the bigger one.

Highlights

Bulk metallic glasses (BMGs) have shown excellent mechanical properties,including high strength, large elastic strain limit, which makes them ideal for structural and functional applications[1,2,3]
Until now, considerably less simulation has been performed for the deformation and fracture in Ni-based BMGs samples with different diameters at room temperature
The stress indicator is shown on the right side of each figure in order to indicate the stress upon deformation and fracture

Summary

Introduction

Bulk metallic glasses (BMGs) have shown excellent mechanical properties,including high strength, large elastic strain limit, which makes them ideal for structural and functional applications[1,2,3]. Their poor ductility at room temperature has significantly limited their application as a potential engineering material[4,5,6]. Distribution of stress and state of equivalent strain in Zr-based BMGs during the compression process were presented. Go et al.[9] analyzed the stress distribution of laminated BMG/metal composites via computer simulation using the ABACUS program during a uni-axial fracture.

Experimental and Numerical Procedure

Results and Discussion

Conclusion