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In-situ TEM observation of nanobubbles evolution in helium-irradiated aluminium upon tensile stressing
Chen, H; Cheng, YM; Lin, CH; Peng, JC; Liang, X; Gao, J; Liu, WQ; Huang, HF
2019
Source PublicationJOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
Volume520Issue:-Pages:178—184
Subtype期刊论文
AbstractPolished high-purity aluminium was irradiated by 500 keV helium ions to a fluence of 3 x 10(16) ions/cm(2) at 450 degrees C. Then a micro-tensile sample was prepared by focused ion beam. The evolution of nanobubbles in irradiated aluminium upon stressing was investigated by employing in-situ tensile testing in a transmission electron microscope. In the case of helium-ions irradiation, dense bubbles with similar sizes are formed in a certain depth region from the irradiated surface. Upon tensile stressing, it was found that bubbles disappeared in the crack tip, and bubble coalescence occurred along the crack-propagation direction, which both contributed to the decrease of bubble number, whereas bubble sizes as well as bubble number showed almost no changes in the region far away the crack tip. This was caused by the non-uniform stresses in the stress fields, in which bubble migration occurred under the stress gradients while bubble evolution was hardly caused in a much low stressed region. Moreover, bubble sizes increased on the grain boundary and bubbles close to the grain boundary gradually disappeared upon stressing. This can be explained by the migration of helium bubbles toward the grain boundary under the stress gradients near the grain boundary. (C) 2019 Elsevier B.V. All rights reserved.
KeywordBUBBLE FORMATION GRAIN-BOUNDARY MICROSTRUCTURE MIGRATION KINETICS GROWTH STEEL
DOI10.1016/j.jnucmat.2019.04.022
Indexed BySCI
Language英语
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/31677
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, Shanghai 200444, Peoples R China;
2.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China;
3.Shanghai Univ, Comp Ctr, Shanghai 200444, Peoples R China;
4.Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China;
5.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
Recommended Citation
GB/T 7714
Chen, H,Cheng, YM,Lin, CH,et al. In-situ TEM observation of nanobubbles evolution in helium-irradiated aluminium upon tensile stressing[J]. JOURNAL OF NUCLEAR MATERIALS,2019,520(-):178—184.
APA Chen, H.,Cheng, YM.,Lin, CH.,Peng, JC.,Liang, X.,...&Huang, HF.(2019).In-situ TEM observation of nanobubbles evolution in helium-irradiated aluminium upon tensile stressing.JOURNAL OF NUCLEAR MATERIALS,520(-),178—184.
MLA Chen, H,et al."In-situ TEM observation of nanobubbles evolution in helium-irradiated aluminium upon tensile stressing".JOURNAL OF NUCLEAR MATERIALS 520.-(2019):178—184.
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