Microstructure and mechanical property evolution of friction stir welded (B4C+Al2O3)/Al composites designed for neutron absorbing materials

doi:10.1007/s11431-019-1512-3

IMR OpenIR

	Microstructure and mechanical property evolution of friction stir welded (B4C+Al2O3)/Al composites designed for neutron absorbing materials
	Zan YuNing 1,3; Wang BeiBei 1; Zhou YangTao 1; Jia CunLei 1,3; Liu ZhenYu 1; Wang QuanZhao 2; Xiao BoLv 1; Ma ZongYi 1
通讯作者	Wang QuanZhao(qzhwang@imr.ac.cn) ; Ma ZongYi(zyma@imr.ac.cn)
	2020-04-14
发表期刊	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN	1674-7321
卷号	63 期号:7 页码:9
摘要	(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.
关键词	particle reinforced Al matrix composites neutron absorber materials FSW mechanical properties high-temperature strength
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; National Key R&D Program of China
DOI	10.1007/s11431-019-1512-3
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS记录号	WOS:000526638800004
出版者	SCIENCE PRESS
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138283
专题	中国科学院金属研究所
通讯作者	Wang QuanZhao; Ma ZongYi
作者单位	1.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
推荐引用方式 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.