The interaction of crack and dislocations in cyclic loading in the body-centered cubic (BCC) crystal

被引：3
|
作者：
Sheng, Yue [1 ]
Yang, Hongda [1 ]
Zhang, Jiding [1 ]
Jiang, Xiaoyu [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mech & Engn, Chengdu, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2023年 / 292卷
基金：
中国国家自然科学基金;
关键词：
Cyclic loading; Crack propagation; Dislocations; Grain boundary; Shielding effect; TRANSMISSION ELECTRON-MICROSCOPY; GRAIN-BOUNDARY; FATIGUE; GROWTH; MICROSTRUCTURES; PROPAGATION; TIPS;
D O I：
10.1016/j.engfracmech.2023.109558
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In engineering, the mode of fatigue crack propagation in crystals is very important for studying the first stage of fatigue crack propagation. In this paper, a model of fatigue crack propagation in crystals is established by using the discrete dislocation method. The propagation rate of fatigue cracks in different crystals and the dislocation movement and distribution on the slip plans (SP) in front of cracks during loading and unloading are obtained by calculation the model. The effects of different dislocation motion behaviors on fatigue crack growth rate during loading and unloading are analyzed, including dislocation emission, rebound and annihilation. Compared with the case without considering dislocation shielding effect, the influence of dislocation shielding effect on fatigue crack propagation is given. At the same time, the effects of different grain sizes and different grain boundary (GB) angles on fatigue crack propagation are studied.
引用
收藏
页数：10
相关论文
共 50 条
  • [1] Interaction of slip dislocations with grain boundaries in body-centered cubic bicrystals
    Gemperle, A
    Gemperlová, J
    Zárubová, N
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 387 : 46 - 50
  • [2] INTERACTION BETWEEN DISLOCATIONS AND INTERSTITIAL ATOMS IN BODY-CENTERED CUBIC METALS
    COCHARDT, AW
    SCHOEK, G
    WIEDERSICH, H
    ACTA METALLURGICA, 1955, 3 (06): : 533 - 537
  • [3] MOBILITY OF DISLOCATIONS IN BODY-CENTERED CUBIC METALS
    KROUPA, F
    SESTAK, B
    CESKOSLOVENSKY CASOPIS PRO FYSIKU SEKCE A, 1977, 27 (04): : 342 - 353
  • [4] The motion of edge dislocations in body-centered cubic metals
    Duesbery, MS
    Xu, W
    SCRIPTA MATERIALIA, 1998, 39 (03) : 283 - 287
  • [5] SCANNING ELECTRON FRACTOGRAPHY OF BODY-CENTERED CUBIC (BCC) METALS
    VASILEV, AD
    SCANNING ELECTRON MICROSCOPY, 1986, 1986 : 917 - 932
  • [6] FRACTURE MECHANISMS AND TOUGHNESS OF BODY-CENTERED CUBIC (BCC) METALS
    TREFILOV, VI
    FIRSTOV, SA
    VASILIEV, AD
    DOKLADY AKADEMII NAUK SSSR, 1988, 300 (04): : 862 - 865
  • [7] Interaction between cracks and dislocations in body-centered cubic crystals under mixed loads
    Sheng, Yue
    Yang, Hongda
    Ma, Wentao
    Jiang, Xiaoyu
    ENGINEERING FRACTURE MECHANICS, 2023, 292
  • [8] SLIP PLANES AND THE ENERGY OF DISLOCATIONS IN A BODY-CENTERED CUBIC STRUCTURE
    CHEN, NK
    MADDIN, R
    ACTA METALLURGICA, 1954, 2 (01): : 49 - 51
  • [9] Impact of magnetism on screw dislocations in body-centered cubic chromium
    Bienvenu, Baptiste
    Fu, Chu Chun
    Clouet, Emmanuel
    ACTA MATERIALIA, 2020, 200 : 570 - 580
  • [10] ZONAL TWINNING DISLOCATIONS IN BODY-CENTERED CUBIC-CRYSTALS
    BRISTOWE, PD
    CROCKER, AG
    PHILOSOPHICAL MAGAZINE, 1976, 33 (02): : 357 - 362
12345