Multiscale Model for Crack Propagation of γ/γ Interface in γ-TiAl Alloy Based on Cohesive Zone Model | |
Li, Jianhua1,2; Zhang, Cheng1; Feng, Ruicheng1,2; Wang, Junjun3; Wang, Maomao1; Li, Haiyan1,2; Qi, Yongnian1; Rui, Zhiyuan1,2 | |
2021-05-01 | |
发表期刊 | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
ISSN | 1002185X |
卷号 | 50期号:5页码:1617-1625 |
摘要 | The multiscale model was established to predict the crack propagation behavior of γ-titanium aluminide (TiAl) alloys. The constitutive parameters of the cohesive zone model (CZM) of true twin (TT) γ/γ interface were obtained by molecular dynamics (MD). The mesoscopic model of polycrystalline γ-TiAl was generated via Voronoi method, and the CZM constitutive parameters were coupled into the model. The corresponding critical stress fracture diagrams with non-defect, blunt crack and blunt crack+central cavity defect were obtained. Furthermore, the polycrystalline model and the overall force-displacement curve were averaged by the geometric similarity, and the damage mechanism of γ-TiAl alloy was analyzed. At the same time, the macroscopic finite element model (FEM) was constructed according to the homogeneous material hypothesis. A cohesive region was built in the interested crack area, and then the force-displacement relationship and fracture toughness of γ-TiAl alloy was obtained through the FEM simulation of the compact tensile specimen. Finally, the results show that the comparison between the crack propagation behavior obtained from the macroscale finite element simulation and the experimental results proves the validity of the multiscale model. The defects have a significant sensitivity on the strength of the entire near-γ structure when the ratio of grain is the same, and meanwhile this analysis method can effectively connect various scales and predict the growth of cracks. Copyright © 2021, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved. |
关键词 | Aluminum alloys Binary alloys Crack propagation Cracks Fracture toughness Molecular dynamics Stress intensity factors Titanium alloys Constitutive parameters Crack propagation behavior Finite element simulations Force-displacement curves Force-displacement relationships Gamma-titanium aluminide Gamma/gamma interfaces Polycrystalline models |
收录类别 | EI |
语种 | 英语 |
出版者 | Science Press |
EI入藏号 | 20212510535312 |
EI主题词 | Finite element method |
EI分类号 | 541.2 Aluminum Alloys ; 542.3 Titanium and Alloys ; 801.4 Physical Chemistry ; 921.6 Numerical Methods ; 951 Materials Science |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/150883 |
专题 | 机电工程学院 兰州理工大学 |
作者单位 | 1.School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China; 3.LS Casting and Forging Branch, Lanzhou LS Group Co., Ltd, Lanzhou; 730050, China |
第一作者单位 | 兰州理工大学 |
第一作者的第一单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Li, Jianhua,Zhang, Cheng,Feng, Ruicheng,et al. Multiscale Model for Crack Propagation of γ/γ Interface in γ-TiAl Alloy Based on Cohesive Zone Model[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2021,50(5):1617-1625. |
APA | Li, Jianhua.,Zhang, Cheng.,Feng, Ruicheng.,Wang, Junjun.,Wang, Maomao.,...&Rui, Zhiyuan.(2021).Multiscale Model for Crack Propagation of γ/γ Interface in γ-TiAl Alloy Based on Cohesive Zone Model.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,50(5),1617-1625. |
MLA | Li, Jianhua,et al."Multiscale Model for Crack Propagation of γ/γ Interface in γ-TiAl Alloy Based on Cohesive Zone Model".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 50.5(2021):1617-1625. |
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