Effect of hydrogen on the dislocation evolution in an aluminum alloy under cyclic loading by two-dimensional discrete dislocation dynamics

被引：5
|
作者：
Hasunuma, Shota [1 ]
Hayase, Tomoyuki [1 ]
机构：
[1] Aoyama Gakuin Univ, Dept Mech Engn, 5-10-1 Fuchinobe,Chuo Ku, Sagamihara, Kanagawa 2525258, Japan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 176卷
关键词：
Hydrogen; Environmental effects; Numerical modeling; Aluminum alloys; Crack nucleation; FATIGUE-CRACK GROWTH; FCC STAINLESS-STEELS; LOW-STRAIN FATIGUE; NUMERICAL SIMULATIONS; SURFACE GRAINS; BEHAVIOR; MICROSTRUCTURE; PLASTICITY;
D O I：
10.1016/j.ijfatigue.2023.107856
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The aim of this research is to reveal the effect of hydrogen on fatigue crack initiation in an aluminum alloy. First, the effect of hydrogen on the dislocation movement, that is, the hydrogen-enhanced localized plasticity (HELP), was modeled. Two mechanisms of HELP were modeled: reduction of the dislocation interaction stress and an increase of the dislocation velocity by hydrogen. Next, simulations of the early stage of crack initiation were performed by discrete dislocation dynamics with the HELP model. The simulation results indicated that HELP accelerates fatigue crack initiation and the increase of the dislocation velocity by hydrogen is the main mechanism of HELP.
引用
收藏
页数：13
相关论文
共 50 条
  • [21] DYNAMICS OF DISLOCATION MEDIATED MELTING OF A TWO-DIMENSIONAL ELECTRON LATTICE
    MAST, DB
    GUO, CJ
    STAN, MA
    MEHROTRA, R
    RUAN, YZ
    DAHM, AJ
    SURFACE SCIENCE, 1984, 142 (1-3) : 100 - 103
  • [22] Simulation of the dynamics of a two-dimensional dislocation-disclination ensemble
    Mikaelyan, KN
    Seefeldt, M
    Gutkin, MY
    Klimanek, P
    Romanov, AE
    PHYSICS OF THE SOLID STATE, 2003, 45 (11) : 2104 - 2109
  • [23] Effective mobility of BCC dislocations in two-dimensional discrete dislocation plasticity
    Katiyar, T.
    Van der Giessen, E.
    COMPUTATIONAL MATERIALS SCIENCE, 2021, 187
  • [24] The effect of electric current on dislocation activity in pure aluminum: A 3D discrete dislocation dynamics study
    Xu, Zhutian
    Li, Xia'nan
    Zhang, Rui
    Ma, Jun
    Qiu, Diankai
    Peng, Linfa
    INTERNATIONAL JOURNAL OF PLASTICITY, 2023, 171
  • [25] The effects of grain size and dislocation source density on the strengthening behaviour of polycrystals: a two-dimensional discrete dislocation simulation
    Biner, SB
    Morris, JR
    PHILOSOPHICAL MAGAZINE, 2003, 83 (31-34): : 3677 - 3690
  • [26] Investigation of the plastic deformation of single crystal copper using a two-dimensional discrete dislocation dynamics model
    Wang C.-H.
    Sun C.-Y.
    Guo X.-R.
    Wei Y.-C.
    Cai W.
    Gongcheng Kexue Xuebao/Chinese Journal of Engineering, 2021, 43 (10): : 1365 - 1375
  • [27] Dislocation structure evolution in thin single crystal plates under cyclic loading.
    Stepanov, YN
    Scorupsky, AM
    EVOLUTION OF EPITAXIAL STRUCTURE AND MORPHOLOGY, 1996, 399 : 397 - 400
  • [28] Plastic deformation evolution in aluminum alloy specimens under cyclic loading
    Bydzan, AY
    Panin, SV
    MODERN TECHNIQUES AND TECHNOLOGY: MTT' 2000, 2000, : 157 - 159
  • [29] A two-dimensional dislocation dynamics model of the plastic deformation of polycrystalline metals
    Ahmed, Naveen
    Hartmaier, Alexander
    JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2010, 58 (12) : 2054 - 2064
  • [30] MODELING THE PLASTIC ZONE AHEAD OF A CRACK BY TWO DIMENSIONAL DISCRETE DISLOCATION DYNAMICS
    Tanguy, D.
    Delafosse, D.
    Razafindrazaka, M.
    EFFECTS OF HYDROGEN ON MATERIALS, 2009, : 640 - 646
12345