Microstructure and mechanical properties of B4C/6061Al neutron absorber composite tube fabricated by spark plasma sintering and hot spinning

被引:24
作者
Chen, Hong-sheng [1 ,4 ]
Nie, Hui-hui [1 ,5 ]
Zhou, Jun [2 ,3 ]
Wang, Wang-xian [2 ,4 ]
Zhang, Peng [2 ]
Zhang, Yu-yang [2 ,4 ]
Wang, Jin-Feng [1 ]
Liu, Run-feng [2 ]
机构
[1] Taiyuan Univ Technol, Coll Mech Engn, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China
[3] Penn State Univ, Dept Mech Engn, Behrend Coll, Erie, PA 16563 USA
[4] Shanxi Key Lab Adv Magnesium Based Mat, Taiyuan 030024, Shanxi, Peoples R China
[5] Shanxi Inst Energy, Jinzhong 030600, Peoples R China
基金
中国国家自然科学基金;
关键词
Neutron absorber composite; Spark plasma sintering; Spinning; Strengthening mechanism; INTERFACIAL REACTION; BOND STRENGTH; MATRIX; RECRYSTALLIZATION;
D O I
10.1016/j.jnucmat.2018.12.048
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this study, a B4C/6061Al neutron absorber composite (NAC) tube containing 5 wt.% B4C particle was first fabricated by spark plasma sintering (SPS) followed by hot spinning (HS), then its microstructure and mechanical properties were experimentally investigated. It was found that, through spinning, B4C particles were better distributed in the 6061 Al matrix and the bonding of the B4C/6061Al matrix interface was improved. Dislocation pileups around B4C particles and dislocation loops were both observed. B4C particles could promote dynamic recrystallized nucleation and pin grain boundaries, resulting in grain refinement in the material. The yield strength (YS), ultimate tensile strength (UTS), and elongation of the spinned composite tube were found higher than that of the SPSed composite tube. The strength improvement of the fabricated B4C/6061Al neutron absorber composite tube was mainly due to the dislocation strengthening mechanism and grain refinement through spinning. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:393 / 400
页数:8
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