Effect of Length and Cross-Sectional Area on Ni3Fe Alloy Plasticity

Mikhail D. Starostenkov; Mohamed Mahmud Aish

doi:10.4028/www.scientific.net/AMR.1013.242

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1013Effect of Length and Cross-Sectional Area on Ni3Fe...

Effect of Length and Cross-Sectional Area on Ni₃Fe Alloy Plasticity

Abstract:

Molecular Dynamics (MD) simulations have been carried out on ultrathin Ni₃Fe alloy with face-centered cubic (FCC) lattice upon application of uniaxial tension at nanolevel with a speed of 20 m/s. the deformation corresponds to the direction <001>. To the calculated block of crystal - free boundary conditions are applied in the directions <100>, <010>. Morse potential was employed to carry out three dimensional molecular dynamics simulations. A computer experiment is performed at a temperature corresponding to 300 K. MD simulation used to investigate the effect of long of ultrathin Ni₃Fe alloy on the nature of deformation and fracture. The engineering stress–time diagrams obtained by the MD simulations of the tensile specimens of these ultrathin Ni₃Fe alloy show a rapid increase in stress up to a maximum followed by a gradual drop to zero when the specimen fails by ductile fracture. The feature of deformation energy can be divided into four regions: quasi-elastic, plastic, flow and failure. The yield strength decreased with increasing long of alloy, but increases with increasing the cross sectional area. Plasticity disappear when the length of the allays is too large. The results showed that breaking position depended on the alloy length.

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Periodical:

Advanced Materials Research (Volume 1013)

Pages:

242-248

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1013.242

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Online since:

October 2014

Authors:

Mikhail D. Starostenkov*, Mohamed Mahmud Aish

Keywords:

Breaking, Feature of Deformation, Molecular Dynamics (MD) Simulations, Morse Potential, Ultrathin Alloy, Yield Strength

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