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A newly designed radiation shielding composite by MCNP and fabricated by SPS followed by hot-rolling
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1.College of Materials Science and Engineering;2.College of Materials Science and Engineering,Taiyuan University of Technology,Shanxi Taiyuan

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    Abstract:

    This study aims to design and fabricate a new kind of radiation shielding composite against both neutron and gamma rays. Based on Monte Carlo simulations, novel (W+B)/6061Al composite sheets with different W mass fractions (40-70%) were first fabricated by ball-milling and SPS followed by hot-rolling, then the microstructure and mechanical properties were investigated. Results show that after rolling process, W and B particles uniformly distributed in the matrix and the interface of W-Al exhibited good metallurgical bonding containing solid solution. The composites were mainly consisted of W and Al phases. EBSD results show that W particles had the effects of promoting dynamic recrystallization (DRX) nucleation, confining the grain growth and reducing the texture of 6061Al matrix. Through tensile tests, the composite with 50 wt.% W shows the highest strength and better plasticity. Together with the simulation results, composite of this composition is believed to meet the demand of practical applications. The strengthening mechanisms of (W+B)/6061Al composites include dislocation strengthening and load transfer effect.

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[Zhang Yuyang, Wang Wenxian, Chen Hongsheng, Liu Ruifeng, Zhang Yuanqi, Shi Ning. A newly designed radiation shielding composite by MCNP and fabricated by SPS followed by hot-rolling[J]. Rare Metal Materials and Engineering,2020,49(3):787~796.]
DOI:10.12442/j. issn.1002-185X.20181039

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History
  • Received:October 14,2018
  • Revised:December 20,2018
  • Adopted:January 10,2019
  • Online: April 08,2020
  • Published: