TY - JOUR
T1 - A novel neutron shielding AA6061/ B4C laminar composite fabricated by powder metallurgy:“SPS-HER”
AU - Chen, Hongsheng
AU - Nie, Huihui
AU - Wang, Wenxian
AU - Zhou, Jun
AU - Liu, Runfeng
N1 - Funding Information:
This work is supported by National Natural Science Foundation of China (Grant No. 51805358 and 51775366 ), “Postdoctoral science Foundation of China” (Grant No. 2018M631773 ) and “Shanxi Province Science Foundation for Youths of China” (Grant No. 201801D221122 ), which is gratefully acknowledged.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10/25
Y1 - 2019/10/25
N2 - In this study, novel-structured (Type A and Type B) laminar A6061/B4C neutron absorber composites were designed and fabricated using spark plasma sintering followed by hot extrusion and rolling (SPS-HER). It was found that B4C particles were evenly distributed in the fabricated composites. The interfaces between particle/matrix and different layers were bonded well. After hot rolling, regions containing large orientation gradient and high dislocation density were found near the B4C particles, which helped dynamic recrystallization (DRX) and grain refinement in the composite. Compared with that of the as-extruded AA6061/B4C laminar composite, yield and ultimate tensile strengths of the as-rolled AA6061/B4C laminar composite are clearly improved. Two yield points were noticed in the material during the tensile test. The composite containing high B4C particle content was found easy to fracture and the fracture mode was ductile.
AB - In this study, novel-structured (Type A and Type B) laminar A6061/B4C neutron absorber composites were designed and fabricated using spark plasma sintering followed by hot extrusion and rolling (SPS-HER). It was found that B4C particles were evenly distributed in the fabricated composites. The interfaces between particle/matrix and different layers were bonded well. After hot rolling, regions containing large orientation gradient and high dislocation density were found near the B4C particles, which helped dynamic recrystallization (DRX) and grain refinement in the composite. Compared with that of the as-extruded AA6061/B4C laminar composite, yield and ultimate tensile strengths of the as-rolled AA6061/B4C laminar composite are clearly improved. Two yield points were noticed in the material during the tensile test. The composite containing high B4C particle content was found easy to fracture and the fracture mode was ductile.
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U2 - 10.1016/j.jallcom.2019.07.133
DO - 10.1016/j.jallcom.2019.07.133
M3 - Article
AN - SCOPUS:85070062516
SN - 0925-8388
VL - 806
SP - 1445
EP - 1452
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -