Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Experimental Investigation on the Weld Metal Fracture Strength of Dissimilar Welded Connection of Carbon Steel and Austenitic Stainless Steel

탄소강과 스테인리스강의 이종강종 용접접합부의 용착금속부 파단내력에 관한 실험적 연구

  • 강현식 (경상국립대학교 건축공학과) ;
  • 김태수 (한밭대학교 건축공학과)
  • Received : 2021.02.13
  • Accepted : 2021.04.19
  • Published : 2021.05.30
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Abstract

Since STS316L among austenitic stainless steels types contains the less carbon compared to STS316 and exhibits excellent intergranular corrosion resistance and plasticity, it has been used under the welded condition without heat treatment after field welding and seismic performance requirement. This paper investigated the ultimate strength and weld metal fracture mechanism of carbon steel (SM355) and austenitic stainless steel (STS316L) fillet-welded connections with TIG (tungsten inert gas) welding through test results. Main variables of specimens are weld length and welding direction against loading. Fracture shapes of specimens were classified into three modes ; tensile fracture, shear fracture and block shear fracture in weld metal except for specimens with the base metal tensile fracture. Material tensile strength of weld metal satisfied the minimum limitation of austenitic stainless steel weld rod (Y316L) in Korean Industrial Standards(KS). Ultimate strengths were compared according to the welding direction and weld length. C2A2TFW series with transverse fillet weld had the highest strength compared with other types (C2A2LFW series with longitudinal fillet weld and C2A2FW series with all round weld) based on identical weld length. It is known that current design specifications such as KDS, AISC, ASCE and AISI underestimated the strength of specimens.

Keywords

Acknowledgement

이 연구는 2020~2021년도 경상국립대학교 대학회계연구비지원에 의하여 연구되었음.

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