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Analysis of anisotropy mechanism in relation with slip activity in near alpha titanium alloy pipe after Pilger cold rolling
He, Shengtong1,2,3; Zeng, Weidong1,2,3; Zhao, Zibo4; Xu, Jianwei1,2,3; Zhou, Dadi1,2,3
Corresponding AuthorZeng, Weidong(zengwd@nwpu.edu.cn) ; Zhao, Zibo(zbzhao@imr.ac.cn)
2022-07-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume909Pages:17
AbstractUnderstanding of anisotropy mechanism for Pilger rolling Ti80 (Ti-6Al-3 Nb-2Zr-1Mo) alloy pipe is of great significance to improve its service performance. In this work, the strength, plasticity and fracture mode of Ti80 alloy pipe with rolling texture in three different directions (RD, TD and 45 degrees) were comparatively investigated. Firstly, the tensile strength is in the descending order of TD, RD and 45 degrees, and plasticity shows the opposite trend. According to the statistics of a large number of deformed grains, the underlying mechanism of anisotropy was revealed by analyzing the slip activation, slip transfer, damage and fracture for three different loading directions. The results show that prismatic < a > slip is the dominant deformation mechanism in RD, and the basal < a > slip is mostly activated in TD. In 45 degrees, the number of activated prismatic < a > slip and basal < a > slip is almost the same. Meanwhile, the pyramidal < a > slip plays an important role in accommodating the plastic deformation. A method for predicting the yield strength was established based on the critical resolved shear stress (CRSS) of basal < a > slip, prismatic < a > slip and pyramidal < a > slip, accompanying by different SFs distributions of activated slip systems. Subsequently, slip transfer, which can relieve the incompatible deformation, occurred between adjacent alpha grains when the slip transfer factor (m) and Schmidt factor (SF) are at a high value. Slip transfer was prone to occurring between the same slip systems, such as between prismatic < a > slip or basal < a > slip. However, it is discovered that the slip transfer between prismatic < a > slip and basal < a > slip is also likely to occur, when the adjacent alpha grains maintain 90 degrees variant relationship. The slip transfer between 90 degrees variants in 45 degrees have higher probability than that in RD and TD due to high SFs of activated basal < a > slip and prism < a > slip, resulting better plasticity. Lastly, the micro-defects are uniformly distributed and the fracture mode is microvoids coalescence in RD. More basal < a > slip induces the cleavage cracks and cause the shear fracture in 45 degrees. In TD, a mixed fracture mode of microvoids coalescence and cleavage is presented due to the heterogeneous deformation. (c) 2022 Elsevier B.V. All rights reserved.
KeywordTi80 alloy pipe Anisotropy Slip transfer Fracture mode
Funding OrganizationProgram of National Key Research and Development Plan of China, China ; National Major Science and Technology Project, China ; National Natural Science Foundation of China, China
DOI10.1016/j.jallcom.2022.164785
Indexed BySCI
Language英语
Funding ProjectProgram of National Key Research and Development Plan of China, China[2016YFB0301203] ; National Major Science and Technology Project, China[J2019-VI-0005-0119] ; National Natural Science Foundation of China, China
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000793139300001
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173984
Collection中国科学院金属研究所
Corresponding AuthorZeng, Weidong; Zhao, Zibo
Affiliation1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
2.Northwestern Polytech Univ, Def Technol Innovat Ctr Precis Forging & Ring Rol, Sch Mat Sci & Engn, Xian 710072, Peoples R China
3.Northwestern Polytech Univ, Shaanxi Key Lab High Performance Precis Forming T, Xian 710072, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
He, Shengtong,Zeng, Weidong,Zhao, Zibo,et al. Analysis of anisotropy mechanism in relation with slip activity in near alpha titanium alloy pipe after Pilger cold rolling[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,909:17.
APA He, Shengtong,Zeng, Weidong,Zhao, Zibo,Xu, Jianwei,&Zhou, Dadi.(2022).Analysis of anisotropy mechanism in relation with slip activity in near alpha titanium alloy pipe after Pilger cold rolling.JOURNAL OF ALLOYS AND COMPOUNDS,909,17.
MLA He, Shengtong,et al."Analysis of anisotropy mechanism in relation with slip activity in near alpha titanium alloy pipe after Pilger cold rolling".JOURNAL OF ALLOYS AND COMPOUNDS 909(2022):17.
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