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Microstructure and mechanical property evolution of friction stir welded (B4C+Al2O3)/Al composites designed for neutron absorbing materials
Zan YuNing1,3; Wang BeiBei1; Zhou YangTao1; Jia CunLei1,3; Liu ZhenYu1; Wang QuanZhao2; Xiao BoLv1; Ma ZongYi1
Corresponding AuthorWang QuanZhao(qzhwang@imr.ac.cn) ; Ma ZongYi(zyma@imr.ac.cn)
2020-04-14
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN1674-7321
Volume63Issue:7Pages:9
Abstract(B4C+Al2O3)/Al composite designed for the dry storage of spent nuclear fuels was fabricated and then subjected to friction stir welding, at a welding speed of 100 mm/min and rotation rates of 400-800 r/min. Sound joints were obtained under all welding parameters; however, significant softening occurred in the nugget zone (NZ) for all the joints. Therefore, all the joints exhibited significantly decreased strength at both room temperature and high temperature compared with the base metal, with the joints fracturing in the NZs. Rotation rate exhibited no obvious effect on the tensile strength of the joints, but led to increased elongation as the result of the broadened NZs. The detailed microstructural examinations indicated that the welding thermo-mechanical effect broke up the near 3D amorphous Al2O3 netlike structure distributed at the Al grain boundaries, caused the coarsening of Al grains, and the agglomeration and crystallization of amorphous Al2O3, thereby resulting in the softening of the NZs and the reduction in the joint strength. Consequently, inhibiting the breakup and crystallization of 3D amorphous Al2O3 netlike structure is the key factor to improve the joint strength of the (B4C+Al2O3)/Al composite.
Keywordparticle reinforced Al matrix composites neutron absorber materials FSW mechanical properties high-temperature strength
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; National Key R&D Program of China
DOI10.1007/s11431-019-1512-3
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[U1508216] ; National Natural Science Foundation of China[51771194] ; Youth Innovation Promotion Association, CAS[2016179] ; National Key R&D Program of China[2017YFB0703104]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS IDWOS:000526638800004
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138283
Collection中国科学院金属研究所
Corresponding AuthorWang QuanZhao; Ma ZongYi
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zan YuNing,Wang BeiBei,Zhou YangTao,et al. Microstructure and mechanical property evolution of friction stir welded (B4C+Al2O3)/Al composites designed for neutron absorbing materials[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2020,63(7):9.
APA Zan YuNing.,Wang BeiBei.,Zhou YangTao.,Jia CunLei.,Liu ZhenYu.,...&Ma ZongYi.(2020).Microstructure and mechanical property evolution of friction stir welded (B4C+Al2O3)/Al composites designed for neutron absorbing materials.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,63(7),9.
MLA Zan YuNing,et al."Microstructure and mechanical property evolution of friction stir welded (B4C+Al2O3)/Al composites designed for neutron absorbing materials".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 63.7(2020):9.
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