Nano-Indentation of Aluminium Reinforced Metallic Glass Composites: A Molecular Dynamics Study

7th National Conference on Processing and Characterization of Materials

Yadav, D.^1 ; Gupta, P.^1 ; Yedla, N.^1

Computational Materials Engineering Group Metallurgical, Materials Engineering Department, National Institute of Technology, Rourkela

769008, India^1

关键词: Embedded-atom method;    Load-displacement curve;    Metallic glass composites;    Molecular dynamics simulations;    Reinforced composites;    Simulation boxes;    Spherical diamond;    Volume percentage;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/338/1/012036/pdf
DOI  :  10.1088/1757-899X/338/1/012036

来源: IOP

【 摘 要 】

Molecular dynamics (MD) simulations are performed for nanoindentation on metal (Al)-metallic glass (Cu50Zr50) reinforced composites to investigate the mechanical properties and the effects of volume percentage on behavior of the load-displacement curves. The interaction among Al-Cu-Zr is modelled using a EAM (Embedded Atom Method) potential. Simulation box size of 100 Å (x) × 100 Å (y) × 100 Å (z) is modelled for investigating the properties of the sintered models by altering the volume percentage on the scale of 5%-20%. Nanoindentation is done along y-direction with a spherical diamond indenter at temperature of 300 K with constant indentation speed of 100 m/s. NVT ensemble is used with a timestep of 0.002 ps. Investigations on the effect of volume percentage show that as volume percentage of Metallic Glass (MG) increases, the corresponding Load required to penetrate inside the sample also increases. As a result of this Hardness also increase as volume percentage varies from 5% to 20%.