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
Source PublicationMODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
ISSN0965-0393
Volume28Issue:1
Abstract

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.

Keywordresidual stress molecular dynamics ?-TiAl alloy tensile deformation ? 3(111) twin boundaries fracture
DOI10.1088/1361-651X/ab4602
URL查看原文
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000499835000001
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/56502
Collection机电工程学院
Corresponding AuthorSong, Wenyuan
Affiliation1.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
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
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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