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논문 기본 정보

자료유형
학술저널
저자정보
Youngchai Lee (Hanyang University) Jae Hee Lee (Hanyang University) Joonoh Moon (Korea Institute of Materials Science) Tae‑Ho Lee (Korea Institute of Materials Science) Changhee Lee (Hanyang University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.8
발행연도
2022.8
수록면
1,971 - 1,980 (10page)
DOI
10.1007/s12540-021-01083-7

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The intrinsic properties of austenite and ferrite on the mechanical properties and corrosion resistance of the duplex stainlesssteel weld metals was studied by substituting Ni with Mn, N, and Mn + N. The properties of the weldments fabricated throughgas tungsten arc welding (GTAW) were evaluated using tensile test, Vickers hardness, and potentiodynamic polarizationtests. The mechanical properties and corrosion resistance of the constituent phases were measured using nanoindentationand electron probe microanalysis, respectively. The austenite and ferrite phase fractions of the weld metal were maintainedat approximately 50:50, and no harmful phases degraded the properties. Excessive Mn decreased the corrosion resistance; alarge difference in corrosion resistance between austenite and ferrite also decreased the overall corrosion resistance. In thefiller metal in which Ni was replaced with only Mn or N, the austenite became harder than ferrite, as a result cracks initiatedinside the austenite. The tensile test showed that austenite, which became a relatively hard phase compared to ferrite accordingto the chemical composition, increased the yield strength and decreased the elongation of the weld metal.

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