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张宇阳,王文先,陈洪胜,刘瑞峰,张媛琦,石宁.一种由MCNP设计,通过SPS加热轧制备的新型辐射屏蔽复合材料[J].稀有金属材料与工程(英文),2020,49(3):787~796.[Zhang Yuyang,Wang Wenxian,Chen Hongsheng,Liu Ruifeng,Zhang Yuanqi and 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.]
A newly designed radiation shielding composite by MCNP and fabricated by SPS followed by hot-rolling
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Received:October 14, 2018  Revised:December 20, 2018
DOI:
Key words: (W+B)/6061Al  Radiation shielding composites  Microstructure  Mechanical properties  Strengthening mechanisms
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Zhang Yuyang,Wang Wenxian,Chen Hongsheng,Liu Ruifeng,Zhang Yuanqi and Shi Ning  
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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.