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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.2
- 수록면
- 6 - 14 (9page)
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This paper has an aim to evaluate microstructure and fracture toughness of TMCP steel weldment applied for off-shore wind tower with the focus on the effect of heat input on the weldment with various welding processes; FCAW(13kJ/cm and 30kJ/cm), SAW(62kJ/cm), and EGW(177kJ/cm). Based on experimental results developed from this study, it was found that the impact toughness of top side for TMCP steel weldments with heat input up to 62 kJ/cm satisfied the required minimum value except the EGW(177kJ/cm). The heat input and microstructure are the main factors of impact toughness. The heat input of 13kJ/cm on back side with low heat input increased the amount of grain boundary ferrite which has low impact toughness, and heat input of 177kJ/cm on top side is significant enough to produce the austenite grain growth. The compositions and sizes of inclusions which are the dominant factors for the formation of acicular ferrite were analyzed by OM and EDS. As the heat input increased, the inclusions also grew and a nucleation site decreased. The size of nonmetallic inclusions and the crack width was nearly similar, therefore the inclusions were related with the crack propagation.
목차
Abstract
1. 서언
2. 실험방법
3. 실험결과 및 고찰
4. 결론
References
참고문헌 (13)
참고문헌 신청
1. [학술지(정기간행물)] - H. J. Kim / 1986 / TMCP강의 개발 및 적용 / Journal of KWS 4 (2) : 1 ~ 11
2. [학술지(정기간행물)] - G. M. Evans / 1991 / The Effect of Nickel on Microstructure and Properties of C-Mn all Weld Metal Deposits / Welding Research Abroad 41 : 70 ~ 83
3. [학술지(정기간행물)] - Y. T. Shin / 1988 / Evaluation of Fracture Toughness and Microstructure on FCA Weldment According to Heat Input / Journal of KWS 26 (3) : 265 ~ 274
4. [학술지(정기간행물)] - J. K. Brownlee / 1986 / Effect of Al and Titanium on the Microstructure and Properties of Microalloyed Steel Weld Metal / Advances in Welding Science and Technology 245
5. [학술지(정기간행물)] - H. W. Lee / 1999 / Microstructures and Impact Properties of 50mm Single Pass Electrogas Weldment for EH36 TMCP steels / Journal of KWS 17 (3) : 244 ~ 249
2. [학술지(정기간행물)] - G. M. Evans / 1991 / The Effect of Nickel on Microstructure and Properties of C-Mn all Weld Metal Deposits / Welding Research Abroad 41 : 70 ~ 83
3. [학술지(정기간행물)] - Y. T. Shin / 1988 / Evaluation of Fracture Toughness and Microstructure on FCA Weldment According to Heat Input / Journal of KWS 26 (3) : 265 ~ 274
4. [학술지(정기간행물)] - J. K. Brownlee / 1986 / Effect of Al and Titanium on the Microstructure and Properties of Microalloyed Steel Weld Metal / Advances in Welding Science and Technology 245
5. [학술지(정기간행물)] - H. W. Lee / 1999 / Microstructures and Impact Properties of 50mm Single Pass Electrogas Weldment for EH36 TMCP steels / Journal of KWS 17 (3) : 244 ~ 249
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