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4D imaging of void nucleation, growth, and coalescence from large and small inclusions in steel under tensile deformation
Guo, Yi1,2; Burnett, Timothy L.1,2; McDonald, Samuel A.1,2,3; Daly, Michael1,2; Sherry, Andrew H.4; Withers, Philip J.1,2
Corresponding AuthorGuo, Yi(yguo@imr.ac.cn)
2022-10-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume123Pages:168-176
AbstractSamples of SA508 grade 3 nuclear pressure vessel ferritic steel were subjected to tensile straining whilst being simultaneously imaged in 3D in real time using high resolution, high frame rate time-lapse synchrotron computed tomography (CT). This enabled direct observation of void development from nucleation, through growth to coalescence and final failure validating many inferences made post-mortem or by theoretical models, as well as raising new points. The sparse, large inclusions were found to nucleate voids at essentially zero plastic strain (consistent with zero interfacial strength); these became increasingly elongated with straining. In contrast, a high density of small spherical voids were found to nucleate from the sub-micron cementite particles at larger strains ( > 200%) only in the centre of the necked (high triaxiality) region. An interfacial strength approaching 2100 MPa was inferred and soon after their nucleation, these small voids coalesce to form internal microcracks that lead to the final failure of the specimen. Perhaps surprisingly, under these conditions of generally low triaxial constraint the large voids are simply cut across and appear to play no significant role in determining the final failure. The implications of these results are discussed in terms of ductile fracture behaviour and the Gurson model for ductile fracture. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordVoid growth Ductile fracture Synchrotron X-ray tomography 4D imaging Bainitic steel
Funding OrganizationEuropean Research Council Grant (COREL-CT) ; EPSRC ; Institute of Metal Research ; National Science Fund for Distinguished Young Scholars ; National Science and Technology Major Project
DOI10.1016/j.jmst.2022.01.024
Indexed BySCI
Language英语
Funding ProjectEuropean Research Council Grant (COREL-CT)[695638] ; EPSRC[EP/R00661X/1] ; EPSRC[EP/S019367/1] ; EPSRC[EP/P025021/1] ; EPSRC[EP/P025498/1] ; Institute of Metal Research ; National Science Fund for Distinguished Young Scholars[5172510] ; National Science and Technology Major Project[J2019-VI-0019-0134]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000788132100008
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172684
Collection中国科学院金属研究所
Corresponding AuthorGuo, Yi
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Manchester, Dept Mat, Henry Royce Inst, Manchester M13 9PL, Lancs, England
3.European Synchrotron Radiat Facil ESRF, 6 Rue J Horowitz, F-38000 Grenoble, France
4.Natl Nucl Lab, Chadwick House,Birchwood Pk, Warrington WA3 6AE, Cheshire, England
Recommended Citation
GB/T 7714
Guo, Yi,Burnett, Timothy L.,McDonald, Samuel A.,et al. 4D imaging of void nucleation, growth, and coalescence from large and small inclusions in steel under tensile deformation[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,123:168-176.
APA Guo, Yi,Burnett, Timothy L.,McDonald, Samuel A.,Daly, Michael,Sherry, Andrew H.,&Withers, Philip J..(2022).4D imaging of void nucleation, growth, and coalescence from large and small inclusions in steel under tensile deformation.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,123,168-176.
MLA Guo, Yi,et al."4D imaging of void nucleation, growth, and coalescence from large and small inclusions in steel under tensile deformation".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 123(2022):168-176.
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