Effects of annealing on the residual stress in γ -TiAl alloy by molecular dynamics simulation | |
Feng, Ruicheng1,2; Song, Wenyuan1; Li, Haiyan1,2; Qi, Yongnian1; Qiao, Haiyang1; Li, Longlong1 | |
刊名 | Materials |
2018-06-15 | |
卷号 | 11期号:6 |
关键词 | Annealing Grain boundaries Point defects Residual stresses Shrinkage Titanium alloys Annealing process Annealing temperatures Average grain size Change of temperatures Defect concentrations Distribution of residual stress Molecular dynamics simulations TiAl alloy |
ISSN号 | 1996-1944 |
DOI | 10.3390/ma11061025 |
英文摘要 | In this paper, molecular dynamics simulations are performed to study the annealing process of γ-TiAl alloy with different parameters after introducing residual stress into prepressing. By mainly focusing on the dynamic evolution process of microdefects during annealing and the distribution of residual stress, the relationship between microstructure and residual stress is investigated. The results show that there is no phase transition during annealing, but atom distortion occurs with the change of temperature, and the average grain size slightly increases after annealing. There are some atom clusters in the grains, with a few point defects, and the point defect concentration increases with the rise in temperature, and vice versa; the higher the annealing temperature, the fewer the point defects in the grain after annealing. Due to the grain boundary volume shrinkage and and an increase in the plastic deformation of the grain boundaries during cooling, stress is released, and the average residual stress along Y and Z directions after annealing is less than the average residual stress after prepressing. © 2018 by the authors. |
WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
语种 | 英语 |
出版者 | MDPI AG, Postfach, Basel, CH-4005, Switzerland |
WOS记录号 | WOS:000436500300158 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/114139] |
专题 | 机电工程学院 |
作者单位 | 1.School of Mechanical and Electronical 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 |
推荐引用方式 GB/T 7714 | Feng, Ruicheng,Song, Wenyuan,Li, Haiyan,et al. Effects of annealing on the residual stress in γ -TiAl alloy by molecular dynamics simulation[J]. Materials,2018,11(6). |
APA | Feng, Ruicheng,Song, Wenyuan,Li, Haiyan,Qi, Yongnian,Qiao, Haiyang,&Li, Longlong.(2018).Effects of annealing on the residual stress in γ -TiAl alloy by molecular dynamics simulation.Materials,11(6). |
MLA | Feng, Ruicheng,et al."Effects of annealing on the residual stress in γ -TiAl alloy by molecular dynamics simulation".Materials 11.6(2018). |
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