Effect of water film on the plastic deformation of monocrystalline copper

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96824-96831 ◽  
Author(s):  
Junqin Shi ◽  
Yanan Zhang ◽  
Kun Sun ◽  
Liang Fang
Keyword(s):  
Molecular Dynamics ◽  
Plastic Deformation ◽  
Molecular Dynamics Simulations ◽  
Deformation Behavior ◽  
Water Film ◽  
Effect Of Water ◽  
Plastic Deformation Behavior ◽  
Dynamics Simulations

The effect of a water film on the plastic deformation behavior and mechanism of monocrystalline copper are studied by molecular dynamics simulations.

scholarly journals Plastic Deformation Behavior of Bi-Crystal Magnesium Nanopillars with a { 10 1 ¯ 2 } Twin Boundary under Compression: Molecular Dynamics Simulations

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 750
Author(s):  
Xiaoyue Yang ◽  
Shuang Xu ◽  
Qingjia Chi
Keyword(s):  
Molecular Dynamics ◽  
Plastic Deformation ◽  
Molecular Dynamics Simulations ◽  
Twin Boundary ◽  
Basal Slip ◽  
Boundary Migration ◽  
Plastic Deformation Process ◽  
Plastic Deformation Behavior ◽  
Schmid Factor ◽  
Dynamics Simulations

In this study, molecular dynamics simulations were performed to study the uniaxial compression deformation of bi-crystal magnesium nanopillars with a { 10 1 ¯ 2 } twin boundary (TB). The generation and evolution process of internal defects of magnesium nanopillars were analyzed in detail. Simulation results showed that the initial deformation mechanism was mainly caused by the migration of the twin boundary, and the transformation of TB into (basal/prismatic) B/P interface was observed. After that, basal slip as well as pyramidal slip nucleated during the plastic deformation process. Moreover, a competition mechanism between twin boundary migration and basal slip was found. Basal slip can inhibit the migration of the twin boundary, and { 10 1 ¯ 1 } ⟨ 10 1 ¯ 2 ⟩ twins appear at a certain high strain level ( ε = 0.104). In addition, Schmid factor (SF) analysis was conducted to understand the activations of deformation modes.

High-density liquid-like component facilitates plastic flow in a model amorphous silicon system

2003 ◽  
Vol 806 ◽  
Author(s):  
Michael J. Demkowicz ◽  
Ali S. Argon
Keyword(s):  
Molecular Dynamics ◽  
Plastic Flow ◽  
Deformation Behavior ◽  
Strain Softening ◽  
Low Density ◽  
Unstressed State ◽  
Plastic Deformation Behavior ◽  
Silicon System ◽  
Amorphous Si ◽  
Dynamics Simulations

ABSTRACTMolecular dynamics simulations show that plastic deformation behavior of model Stillinger-Weber amorphous Si is very sensitive to the density of the initial unstressed state. Low-density systems exhibit a pronounced yield phenomenon, strain softening, and a dramatic drop in pressure during deformation at constant volume. This behavior is explained by the interplay in every system of the prevailing solid-like and liquid-like components, with the latter being denser and more amenable to plastic flow.

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