Plasticity and melting characteristics of metal Al with Ti-cluster under shock loading

Dong Lin Luan; Ya Bin Wang; Guo Meng Li; Lei Yuan; Jun Chen

doi:10.1088/1674-1056/abe1a0

Plasticity and melting characteristics of metal Al with Ti-cluster under shock loading

Dong Lin Luan, Ya Bin Wang^*, Guo Meng Li, Lei Yuan, Jun Chen^*

^*Corresponding author for this work

School of Mechatronical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Impurity agglomeration has a significant influence on shock response of metal materials. In this paper, the mechanism of Ti-clusters in metal Al under shock loading is investigated by non-equilibrium molecular dynamics simulations. Our results show that the Ti-cluster has obvious effects on the dislocation initiation and melting of bulk Al. First, the Ti clusters induces the strain concentrate and leads the dislocations to be initiated from the interface of Ti cluster. Second, dislocation distribution from the Ti-cluster model results in a formation of a grid-like structure, while the dislocation density is reduced compared with that from the perfect Al model. Third, the critical shock velocity of dislocation from the Ti-cluster model is lower than from perfect Al model. Furthermore, it is also found that the temperature near the interface of Ti-cluster is 100 K-150 K higher than in the other areas, which means that Ti-cluster interface melts earlier than the bulk area.

Original language	English
Article number	073103
Journal	Chinese Physics B
Volume	30
Issue number	7
DOIs	https://doi.org/10.1088/1674-1056/abe1a0
Publication status	Published - Jul 2021

Keywords

dislocation
impurity cluster
molecular dynamics
shock loading

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10.1088/1674-1056/abe1a0

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@article{0c6b11b2d34a46d1a5c161abbfa00107,

title = "Plasticity and melting characteristics of metal Al with Ti-cluster under shock loading",

abstract = "Impurity agglomeration has a significant influence on shock response of metal materials. In this paper, the mechanism of Ti-clusters in metal Al under shock loading is investigated by non-equilibrium molecular dynamics simulations. Our results show that the Ti-cluster has obvious effects on the dislocation initiation and melting of bulk Al. First, the Ti clusters induces the strain concentrate and leads the dislocations to be initiated from the interface of Ti cluster. Second, dislocation distribution from the Ti-cluster model results in a formation of a grid-like structure, while the dislocation density is reduced compared with that from the perfect Al model. Third, the critical shock velocity of dislocation from the Ti-cluster model is lower than from perfect Al model. Furthermore, it is also found that the temperature near the interface of Ti-cluster is 100 K-150 K higher than in the other areas, which means that Ti-cluster interface melts earlier than the bulk area.",

keywords = "dislocation, impurity cluster, molecular dynamics, shock loading",

author = "Luan, {Dong Lin} and Wang, {Ya Bin} and Li, {Guo Meng} and Lei Yuan and Jun Chen",

note = "Publisher Copyright: {\textcopyright} 2021 Chinese Physical Society and IOP Publishing Ltd.",

year = "2021",

month = jul,

doi = "10.1088/1674-1056/abe1a0",

language = "English",

volume = "30",

journal = "Chinese Physics B",

issn = "1674-1056",

publisher = "IOP Publishing Ltd.",

number = "7",

}

TY - JOUR

T1 - Plasticity and melting characteristics of metal Al with Ti-cluster under shock loading

AU - Luan, Dong Lin

AU - Wang, Ya Bin

AU - Li, Guo Meng

AU - Yuan, Lei

AU - Chen, Jun

PY - 2021/7

Y1 - 2021/7

N2 - Impurity agglomeration has a significant influence on shock response of metal materials. In this paper, the mechanism of Ti-clusters in metal Al under shock loading is investigated by non-equilibrium molecular dynamics simulations. Our results show that the Ti-cluster has obvious effects on the dislocation initiation and melting of bulk Al. First, the Ti clusters induces the strain concentrate and leads the dislocations to be initiated from the interface of Ti cluster. Second, dislocation distribution from the Ti-cluster model results in a formation of a grid-like structure, while the dislocation density is reduced compared with that from the perfect Al model. Third, the critical shock velocity of dislocation from the Ti-cluster model is lower than from perfect Al model. Furthermore, it is also found that the temperature near the interface of Ti-cluster is 100 K-150 K higher than in the other areas, which means that Ti-cluster interface melts earlier than the bulk area.

AB - Impurity agglomeration has a significant influence on shock response of metal materials. In this paper, the mechanism of Ti-clusters in metal Al under shock loading is investigated by non-equilibrium molecular dynamics simulations. Our results show that the Ti-cluster has obvious effects on the dislocation initiation and melting of bulk Al. First, the Ti clusters induces the strain concentrate and leads the dislocations to be initiated from the interface of Ti cluster. Second, dislocation distribution from the Ti-cluster model results in a formation of a grid-like structure, while the dislocation density is reduced compared with that from the perfect Al model. Third, the critical shock velocity of dislocation from the Ti-cluster model is lower than from perfect Al model. Furthermore, it is also found that the temperature near the interface of Ti-cluster is 100 K-150 K higher than in the other areas, which means that Ti-cluster interface melts earlier than the bulk area.

KW - dislocation

KW - impurity cluster

KW - molecular dynamics

KW - shock loading

UR - http://www.scopus.com/inward/record.url?scp=85110952607&partnerID=8YFLogxK

U2 - 10.1088/1674-1056/abe1a0

DO - 10.1088/1674-1056/abe1a0

M3 - Article

AN - SCOPUS:85110952607

SN - 1674-1056

VL - 30

JO - Chinese Physics B

JF - Chinese Physics B

IS - 7

M1 - 073103

ER -

Plasticity and melting characteristics of metal Al with Ti-cluster under shock loading

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Keywords

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