4D imaging of void nucleation, growth, and coalescence from large and small inclusions in steel under tensile deformation

doi:10.1016/j.jmst.2022.01.024

CORC > 金属研究所 > 中国科学院金属研究所

	4D imaging of void nucleation, growth, and coalescence from large and small inclusions in steel under tensile deformation
	Guo, Yi 1,2; Burnett, Timothy L.1,2; McDonald, Samuel A.1,2,3; Daly, Michael 1,2; Sherry, Andrew H.4; Withers, Philip J.1,2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2022-10-01
卷号	123 页码:168-176
关键词	Void growth Ductile fracture Synchrotron X-ray tomography 4D imaging Bainitic steel
ISSN号	1005-0302
DOI	10.1016/j.jmst.2022.01.024
通讯作者	Guo, Yi(yguo@imr.ac.cn)
英文摘要	Samples 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.
资助项目	European 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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000788132100008
资助机构	European Research Council Grant (COREL-CT) ; EPSRC ; Institute of Metal Research ; National Science Fund for Distinguished Young Scholars ; National Science and Technology Major Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172683]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, Yi
作者单位	1.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
推荐引用方式 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.