| 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 Author | Wang QuanZhao(qzhwang@imr.ac.cn) ; Ma ZongYi(zyma@imr.ac.cn) |
| 2020-04-14 | |
| Source Publication | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
 |
| ISSN | 1674-7321 |
| Volume | 63Issue: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. |
| Keyword | particle reinforced Al matrix composites neutron absorber materials FSW mechanical properties high-temperature strength |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000526638800004 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/138283 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang QuanZhao; Ma ZongYi |
| Affiliation | 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 |
| 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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