Atomistic simulation of mechanical properties and crack propagation of irradiated nickel

被引：8

作者：

Ma, Lei ^{[1
]}

Xiao, Shifang ^{[3
]}

Deng, Huiqiu ^{[3
]}

Hu, Wangyu ^{[2
]}

机构：

[1] Hunan Univ Arts & Sci, Coll Phys & Elect Sci, Changde 415000, Peoples R China

[2] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

[3] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2016年 / 120卷

关键词：

Molecular dynamics; Irradiation; Mechanical properties; Crack propagation; MOLECULAR-DYNAMICS; DAMAGE; MICROSTRUCTURE; EVOLUTION; CASCADES; GROWTH; TIP; NI;

D O I：

10.1016/j.commatsci.2016.04.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanical properties and fatigue crack propagation of irradiated Ni were investigated using molecular dynamic simulations. The irradiation specimens were obtained by cascade collision, and the primary knocked-on atom (PKA) energy was 10 keV. Tensile results showed that the irradiation led to the decrease in yield stress and yield strain, and also induced the variation of elastic modulus. Analysis of the microstructure in irradiated Ni showed that the irradiation defects inhibited the dislocation motion so that the extension of slip bands was limited, and caused the density of slip bands decreasing. Beside, the influence of irradiation defects on fatigue crack propagation was investigated. It was found that the irradiation defects could slow down the formation of blunting and slip bands and hindered effectively the fatigue crack propagation at 100 K. At 300 K, the crack attracted irradiation defects together, which accelerated the crack propagation with the formation of many slip bands. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：21 / 28

页数：8

共 50 条

[1] Atomistic simulation of crack propagation along γ-TiAl lamellar interface
Li, W.
Nan, H.
Qian, X. W.
Yin, Y. J.
Xu, Q.
Shen, X.
Yu, W.
Feng, X.
Zhu, L. P.
Zhou, J. X.
[J]. JOINT 5TH INTERNATIONAL CONFERENCE ON ADVANCES IN SOLIDIFICATION PROCESSES (ICASP-5) & 5TH INTERNATIONAL SYMPOSIUM ON CUTTING EDGE OF COMPUTER SIMULATION OF SOLIDIFICATION, CASTING AND REFINING (CSSCR-5), 2019, 529
[2] Atomistic simulation of {0001}<■> crack propagation with Nb precipitates in α-Zr
Hua Ji
Jian Yin
Guo Wei
Wen-Sheng Lai
Bai-Xin Liu
Jian-Bo Liu
[J]. Rare Metals, 2023, 42 (05) : 1663 - 1669
[3] Dynamic crack propagation in copper bicrystals grain boundary by atomistic simulation
Zhou, Yanguang
Yang, Zhenyu
Lu, Zixing
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 599 : 116 - 124
[4] Atomistic simulation of [100](001) crack propagation with Cu precipitates in α-iron
Yin, Jian
Hou, Huaiyu
Wang, Jing Tao
Liu, Xiangbing
Xue, Fei
[J]. INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2021, 194
[5] Atomistic simulation of thermodynamic and mechanical properties of metals
Moriarty, John A.
[J]. Journal of Computer-Aided Materials Design, 1998, 5 (2-3): : 109 - 129
[6] Atomistic simulation of the mechanical properties of nanoporous gold
[J]. Bringa, E.M., 1600, Elsevier Ltd (80):
[7] Atomistic simulation of the mechanical properties of nanoporous gold
Rodriguez-Nieva, J. F.
Ruestes, C. J.
Tang, Y.
Bringa, E. M.
[J]. ACTA MATERIALIA, 2014, 80 : 67 - 76
[8] Atomistic computer simulation of mechanical properties of composites
Steinfath, M
Bruns, W
[J]. MACROMOLECULAR THEORY AND SIMULATIONS, 1997, 6 (04) : 749 - 760
[9] Atomistic simulation of {0001}(1210) crack propagation with Nb precipitates in a-Zr
Ji, Hua
Yin, Jian
Wei, Guo
Lai, Wen-Sheng
Liu, Bai-Xin
Liu, Jian-Bo
[J]. RARE METALS, 2023, 42 (05) : 1663 - 1669
[10] ATOMISTIC CONSIDERATION AND COMPUTER-SIMULATION OF THE INITIATION AND THE PROCESS OF CRACK-PROPAGATION
NISHIOKA, K
TAJIMA, J
ADACHI, Y
TAKAI, T
ARIMITSU, Y
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1994, 176 (1-2): : 271 - 276

← 1 2 3 4 5 →