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Influence of Gadolinium Addition on Mechanical and Corrosion Properties of 2205 Duplex Stainless Steel

가돌리늄 첨가에 따른 2205 듀플렉스 스테인레스 강의 기계적 및 부식 특성 변화

  • Received : 2015.09.25
  • Accepted : 2015.12.04
  • Published : 2015.12.31

Abstract

This study reports the influence of gadolinium (Gd) addition on mechanical and corrosion properties of 2205 duplex stainless steel. In all alloys produced, regardless of the initial Gd content, Gd-based inclusions were well distributed in the duplex stainless steel matrix. As the Gd content increased from 0 wt% to 0.19 wt%, the ultimate tensile strength and hardness of the alloy increased from 630 MPa to 977 MPa and from 57 to 61, respectively, while elastic modulus, tensile elongation and impact energy of the alloy decreased. The critical crevice temperatures of Alloy1, Alloy2 and Alloy3 were $20^{\circ}C$, $20^{\circ}C$ and $15^{\circ}C$, respectively.

Keywords

Duplex stainless steel;Gadolinium;Rare earth metal;Microstructure;Tensile property;Impact property

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Acknowledgement

Grant : 고효율 중성자 흡수/차폐능을 갖는 고강도 Gd-이상 스테인레스강 제조 기술 개발

Supported by : 한국에너지기술평가원