The effect of residual stress on?3(111) twin boundaries fracture behavior in ?-TiAl with molecular dynamics simulation | |
Feng, Ruicheng(冯瑞成)1,2,3; Song, Wenyuan1; Li, Haiyan(李海燕)1; Wang, Maomao1; Qi, Yongnian1 | |
2020-01 | |
发表期刊 | MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING |
ISSN | 0965-0393 |
卷号 | 28期号:1 |
摘要 | In this paper, molecular dynamics (MD) simulations are performed to study the influence of residual stress on fracture behavior in ?-TiAl alloy with ?3(111) twin boundaries. The tensile processes are simulated at 1, 300, 1050 K after the residual stress is introduced by prepressing. The evolution of microdefects during tensile fracture is observed, and the distribution of residual stress in three direction is characterized. Results show that the introduced residual stress is symmetrically distributed on both sides of ?3(111) twin boundaries. The residual compressive stress can prevent the nucleation of micro-cracks and increase the yield strength. The fracture mode of the ?-TiAl alloy with ?3(111) twin boundaries during tensile load at 1 K is the nucleation of microcracks at grain boundaries followed by intergranular fracture. The ?3(111) twin boundaries have good thermal stability. The residual compressive stress is completely released and the amplitude of residual tensile stress increases at 1050 K, and the ?-TiAl alloy with ?3(111) twin boundaries exhibits good ductility. |
关键词 | residual stress molecular dynamics ?-TiAl alloy tensile deformation ? 3(111) twin boundaries fracture |
DOI | 10.1088/1361-651X/ab4602 |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[51865027][51665030] ; Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China[IRT_15R30] |
WOS研究方向 | Materials Science ; Physics |
WOS类目 | Materials Science, Multidisciplinary ; Physics, Applied |
WOS记录号 | WOS:000499835000001 |
出版者 | IOP PUBLISHING LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/56502 |
专题 | 机电工程学院 |
通讯作者 | Song, Wenyuan |
作者单位 | 1.Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou, Gansu, Peoples R China 2.Lanzhou Univ Technol, Minist Educ, Engn Res Ctr Nonferrous Met New Equipment, Lanzhou, Gansu, Peoples R China 3.Lanzhou Univ Technol, Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China |
第一作者单位 | 兰州理工大学 |
通讯作者单位 | 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 | Feng, Ruicheng,Song, Wenyuan,Li, Haiyan,et al. The effect of residual stress on?3(111) twin boundaries fracture behavior in ?-TiAl with molecular dynamics simulation[J]. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,2020,28(1). |
APA | Feng, Ruicheng,Song, Wenyuan,Li, Haiyan,Wang, Maomao,&Qi, Yongnian.(2020).The effect of residual stress on?3(111) twin boundaries fracture behavior in ?-TiAl with molecular dynamics simulation.MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,28(1). |
MLA | Feng, Ruicheng,et al."The effect of residual stress on?3(111) twin boundaries fracture behavior in ?-TiAl with molecular dynamics simulation".MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 28.1(2020). |
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