Effects of Annealing on the Residual Stress in gamma-TiAl Alloy by Molecular Dynamics Simulation | |
Feng, Ruicheng(冯瑞成)1,2; Song, Wenyuan1; Li, Haiyan(李海燕)1,2; Qi, Yongnian1; Qiao, Haiyang1; Li, Longlong1 | |
刊名 | MATERIALS |
2018-06 | |
卷号 | 11期号:6 |
关键词 | residual stress molecular dynamics gamma-TiAl alloy anneal |
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 -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. |
资助项目 | National Natural Science Fundation of China[51665030] ; Program for Changjiang Scholars and Innovative Research Team in Universities of the Ministry of Education of China[IRT_15R30] |
WOS研究方向 | Materials Science |
语种 | 英语 |
出版者 | MDPI |
WOS记录号 | WOS:000436500300158 |
状态 | 已发表 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.223/handle/2XXMBERH/32615] |
专题 | 机电工程学院 |
通讯作者 | Li, Haiyan(李海燕) |
作者单位 | 1.Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Key Lab Digital Mfg Technol & Applicat, Minist Educ, Lanzhou 730050, Gansu, Peoples R 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 gamma-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 gamma-TiAl Alloy by Molecular Dynamics Simulation.MATERIALS,11(6). |
MLA | Feng, Ruicheng,et al."Effects of Annealing on the Residual Stress in gamma-TiAl Alloy by Molecular Dynamics Simulation".MATERIALS 11.6(2018). |
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