Microstructure and Fracture Property of 1A Grade Duplex Stainless Steel with the Addition of Gadolinium

가돌리늄(Gd) 첨가에 따른 1A 등급 듀플렉스 스테인레스 강의 미세조직 및 파괴 특성 변화

  • Lim, Jae-han (Liquid Processing & Casting R&D Group, Korea Institute of Industrial Technology) ;
  • Jung, Hyun-Do (Liquid Processing & Casting R&D Group, Korea Institute of Industrial Technology) ;
  • Ahn, Ji-Ho (Liquid Processing & Casting R&D Group, Korea Institute of Industrial Technology) ;
  • Moon, Byung-Moon (Liquid Processing & Casting R&D Group, Korea Institute of Industrial Technology)
  • Received : 2015.11.09
  • Accepted : 2016.02.03
  • Published : 2016.02.29


CD4MCU duplex stainless steel with gadolinium was fabricated as a neutron absorbing material by the air induction melting method. The gadolinium formed intermetallic compounds of Cu-Gd-Fe. There were no significant differences in hardness or ultimate tensile strength between experimental alloys. With the addition of gadolinium the yield strength of the cast alloy significantly increased, from $478.8{\pm}11.6$ to $514.2{\pm}29.9MPa$, whereas elongation of the cast alloy decreased with the addition of gadolinium, from $26.0{\pm}7.1$ to $7.0{\pm}2.5%$ due to the formation of gadolinium based intermetallic compounds.



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