Deformation of Ni20W20Cu20Fe20Mo20 high entropy alloy for tensile followed by compressive and compressive followed by tensile loading: A molecular dynamics simulation based study

5th National Conference on Processing and Characterization of Materials

Meraj, Md^1 ; Pal, S.^1

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

769008, India^1

关键词: Atomic diffusions;    Deformation behavior;    Deformation behaviour;    Dominant deformation mechanism;    Dominating factors;    High entropy alloys;    Molecular dynamics simulations;    Twin;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/115/1/012019/pdf
DOI  :  10.1088/1757-899X/115/1/012019

来源: IOP

【 摘 要 】

In this paper, molecular dynamics (MD) simulations based study on deformation behavior during uniaxial tension followed by compression and compression followed by tension after 0.6 pre-strain for Ni20W20Cu20Fe20Mo20 high entropy alloy (20 at. % each element) single crystals has been reported. This MD simulation is carried out at strain rate of 108 s-1 and at the temperature of -10°C. The influence of observed nano twin on deformation behaviour for such two types of loading process (i.e. tensile followed by compressive and compressive followed by tensile) has been investigated thoroughly. It is found that the dominant deformation mechanism is twin for tensile forward loading in Ni20W20Cu20Fe20Mo20 high entropy alloy single crystal, whereas atomic diffusion is the dominating factor for deformation behaviour in compressive reverse loading direction of high entropy alloy.