A novel neutron shielding AA6061/ B4C laminar composite fabricated by powder metallurgy:“SPS-HER”

Hongsheng Chen, Huihui Nie, Wenxian Wang, Jun Zhou, Runfeng Liu

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1445-1452
Number of pages8
JournalJournal of Alloys and Compounds
Volume806
DOIs
StatePublished - Oct 25 2019

Fingerprint

Spark plasma sintering
Powder metallurgy
Shielding
Extrusion
Neutrons
Composite materials
Dynamic recrystallization
Hot rolling
Grain refinement
Tensile strength

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Chen, Hongsheng ; Nie, Huihui ; Wang, Wenxian ; Zhou, Jun ; Liu, Runfeng. / A novel neutron shielding AA6061/ B4C laminar composite fabricated by powder metallurgy:“SPS-HER”. In: Journal of Alloys and Compounds. 2019 ; Vol. 806. pp. 1445-1452.
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abstract = "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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A novel neutron shielding AA6061/ B4C laminar composite fabricated by powder metallurgy:“SPS-HER”. / Chen, Hongsheng; Nie, Huihui; Wang, Wenxian; Zhou, Jun; Liu, Runfeng.

In: Journal of Alloys and Compounds, Vol. 806, 25.10.2019, p. 1445-1452.

Research output: Contribution to journalArticle

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

PY - 2019/10/25

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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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