Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Gd effect on microstructure and properties of the Modified-690 alloy for function structure integrated thermal neutron shielding

  • Cheng Zhang (Institute of Materials, Shanghai University) ;
  • Jie Pan (Institute of Materials, Shanghai University) ;
  • Zixie Wang (Institute of Materials, Shanghai University) ;
  • Zhaoyu Wu (Chengdu Vocational Technical College of Industry) ;
  • Qiliang Mei (Shanghai Nuclear Engineering Research & Design Institute Co., LTD.) ;
  • Qianxue Ding (Shanghai Nuclear Engineering Research & Design Institute Co., LTD.) ;
  • Jing Gao (Shanghai Nuclear Engineering Research & Design Institute Co., LTD.) ;
  • Xueshan Xiao (Institute of Materials, Shanghai University)
  • Received : 2022.04.25
  • Accepted : 2023.01.16
  • Published : 2023.05.25
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Abstract

The new Modified-690Gd alloy, namely as Ni-30Cr-(10-x) Fe-xGd (x = 0.5, 1.0, 1.5,2.0, 3.0 wt%) for function structure integrated thermal neutron shielding has been prepared and characterized. The Modified-690Gd alloy was mainly composed of γ austenite matrix and (Ni, Cr, Fe)5Gd precipitated along grain boundaries. The new Modified-690Gd alloy had great mechanical properties, which had the tensile strength exceeding 620 MPa and the elongation being above 50%. Meanwhile, this alloy had excellent weldability and good corrosion resistance in boric acid. The new Modified-690Gd alloy is expected to be a kind of high efficiency thermal neutron shielding materials.

Keywords

Acknowledgement

This work was sponsored by the Science and Technology Plan Project of Sichuan Province under Contract No. 2021YJ0058.

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