Molecular dynamics simulation of strengthening dependence on precipitate Cr composition in Fe-15at.%Cr alloy

Ibrahim, Sherif A.; Wang, Qingyu; Zhang, Yue; Ado, Mohammed; Chung, Gyang Davou; Azeem, Musaddaq

doi:10.1016/j.micron.2020.102823

Cited by 8 publications

(2 citation statements)

References 41 publications

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“…In this study, the simulation results were examined by common neighbor analysis and dislocation extraction algorithm (DXA) embedded in OVITO software package. [ 20 ]…”

Section: Methodsmentioning

confidence: 99%

Molecular Dynamics Simulation of Interaction between Edge Dislocations and Stable β‐Phase Precipitates in Aluminum Alloy

Li,

Qiu,

Kong

et al. 2023

Physica Status Solidi (b)

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Stable precipitate takes the essential role for material strengthening in Al‐Mg‐Si alloys. To reveal how the stable precipitate works in material strengthening, a molecular dynamics model is carried out to show the interaction between the edge dislocations and the plate‐shaped β phase of Mg2Si. The critical resolved shear stress (CRSS) is related to the precipitate characteristics including sizes and thickness directions. The CRSS increases with the increase of the precipitate size. When the thickness direction of precipitate changes from [001] to [100], the CRSS increases from 326.76 MPa to 368.7 MPa. This phenomenon is mainly affected by the interaction length between dislocation and β phase. With the increase of interaction length, the interaction time for dislocation to overcome pinning increases. The critical bending angle of dislocation can be affected by the interaction time and shear strain rate. The relationship between the critical bending angle and the CRSS in Al‐Mg‐Si alloy is then established.This article is protected by copyright. All rights reserved.

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“…In this study, the simulation results were examined by common neighbor analysis and dislocation extraction algorithm (DXA) embedded in OVITO software package. [ 20 ]…”

Section: Methodsmentioning

confidence: 99%

Molecular Dynamics Simulation of Interaction between Edge Dislocations and Stable β‐Phase Precipitates in Aluminum Alloy

Li,

Qiu,

Kong

et al. 2023

Physica Status Solidi (b)

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“…This phenomenon is also observed by Ibrahim. [30] Shear deformation is the main mode of plastic deformation for aluminum alloys in microscale. But to reveal the role of precipitate on strengthening, the tensile loading was applied to the MD model, as shown in Figure 3.…”

Section: Effect Of Precipitate Size On Strengtheningmentioning

confidence: 99%

Mechanism on Material Strengthening of Metastable Precipitate and Edge Dislocation in Al–Mg–Si Alloy

Kong

Liu²,

Zhang

2023

Physica Status Solidi (b)

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The metastable precipitate β″ plays a key role in material strengthening in Al–Mg–Si alloys. To investigate the mechanism on material strengthening of metastable precipitates, the interaction between β″ metastable precipitates and edge dislocations is studied using molecular dynamics. It is indicated in the results that the precipitate can be overcome by shearing without the formation of Orowan loops in case of smaller precipitate sizes. By increasing the temperature and reducing the shear strain rate, the critical resolved shear stress (CRSS) can be decreased. Larger precipitate sizes can lead to higher CRSS due to larger interaction area. Shear deformation can be clearly found on the precipitate when dislocations interact with the precipitate. When newly generated dislocations further interact with the sheared precipitate, the strengthening can be reduced due to the smaller cut width. This is the reason that strain hardening decreases with the increase of plastic deformation in macro scale.

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Molecular dynamics simulations to quantify the interaction of a rigid and impenetrable precipitate with an edge dislocation in Cu

Tsugawa

Hayakawa

Iwase

et al. 2022

Computational Materials Science

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Molecular dynamics simulation of strengthening dependence on precipitate Cr composition in Fe-15at.%Cr alloy

Cited by 8 publications

References 41 publications

Molecular Dynamics Simulation of Interaction between Edge Dislocations and Stable β‐Phase Precipitates in Aluminum Alloy

Molecular Dynamics Simulation of Interaction between Edge Dislocations and Stable β‐Phase Precipitates in Aluminum Alloy

Mechanism on Material Strengthening of Metastable Precipitate and Edge Dislocation in Al–Mg–Si Alloy

Molecular dynamics simulations to quantify the interaction of a rigid and impenetrable precipitate with an edge dislocation in Cu

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