pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (35권6호 163-169)
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
Jae-han Lim, Ji-Ho Ahn, Byung-Moon Moon† and Young-Jig Kim*
Liquid Processing & Casting R&D Group, Korea Institute of Industrial Technology, Incheon 21999, Korea *School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Korea
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 s stainless steel matrix. As the Gd content increased from 0 wt% to 0.19 wt%, the u ultimate tensile strength and hardness of the alloy increased from 630 MPa to 977 M MPa and from 57 to 61, respectively, while elastic modulus, tensile elongation and i impact energy of the alloy decreased. The critical crevice temperatures of Alloy1, A Alloy2 and Alloy3 were 20oC, 20oC and 15oC, respectively.
Duplex stainless steel, Gadolinium, Rare earth metal, Microstructure, Tensile property, Impact property
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