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Low Temperature Effects on the Strength and Fracture Toughness of Membrane for LNG Storage Tank
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 Title & Authors
Low Temperature Effects on the Strength and Fracture Toughness of Membrane for LNG Storage Tank
Kim, Jeong-Gyu; Kim, Cheol-Su; Jo, Dong-Hyeok; Kim, Do-Sik; Yun, In-Su;
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 Abstract
Tensile and fracture toughness tests of the cold-rolled STS 304 steel plate for membrane material of LNG storage tank were performed at wide range of temperatures, 11 IK(boiling point of LNG), 153K , 193K and 293K(room temperature). Tensile strength significantly increases with a decrease in temperature, but the yield strength is relatively insensitive to temperature. Elongation at 193K abruptly decreases by 50% of that at 293K, and then decreases slightly in the temperature range of 193K to 111K. Strain hardening exponents at low temperatures are about four times as high as that at 293K. Elastic-plastic fracture toughness() and tearing modulus() tend to decrease with a decrease in temperature. The values are inversely related to effective yield strength in the temperature range of 111K to 293K. These phenomena result from a significant increase in the amount of transformed martensite in low temperature regions.
 Keywords
LNG Storage Tank;J-Integral;Strain-Induced Martensitic Transformation;Elastic-Plastic Fracture Toughness;Effective Yield Strength;Tearing Modulus;Stretched Zone Width;
 Language
Korean
 Cited by
1.
LNG저장탱크의 멤브레인용 국산 304 스테인리스강의 기계적성질 및 피로수명 평가,김형식;

대한기계학회논문집A, 2001. vol.25. 10, pp.1644-1650 crossref(new window)
2.
극저온 재료 성능분석을 위한 온도의존 손상모델 개발,이경준;김태우;유재신;유성원;전민성;이제명;

대한조선학회논문집, 2008. vol.45. 5, pp.538-546 crossref(new window)
3.
극저온용 스테인레스 강의 저온거동 특성,홍진한;금동민;한대석;박인범;전민성;고경완;이제명;

대한조선학회논문집, 2008. vol.45. 5, pp.530-537 crossref(new window)
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