In this study, a B 4 C/6061Al neutron absorber composite (NAC) tube containing 5 wt.% B 4 C 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, B 4 C particles were better distributed in the 6061 Al matrix and the bonding of the B 4 C/6061Al matrix interface was improved. Dislocation pileups around B 4 C particles and dislocation loops were both observed. B 4 C 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 B 4 C/6061Al neutron absorber composite tube was mainly due to the dislocation strengthening mechanism and grain refinement through spinning.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering