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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.2
- 수록면
- 65 - 73 (9page)
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초록· 키워드
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Microstructural characteristics of two high strength (600 ㎫ & 800 ㎫) weld metals produced by flux-cored arc welding process (FCAW) were evaluated. The 600 MPa grade weld metal was consisted of 75% acicular ferrite and 25% ferrite which was formed at relatively high temperature (grain boundary ferrite, widmanstatten ferrite, polygonal ferrite). However, the 800 ㎫ grade weld metal was composed of about 85% acicular ferrite and 15% low temperature forming phases (bainite, martensite). The prior austenite grain size of 800 ㎫ grade weld metal was decreased by solute drag force. The compositions and sizes of inclusions which are the dominant factors for the formation of acicular ferrite were analyzed by a transmission electron microscopy (TEM). In both 600 ㎫ and 800 ㎫ grade weld metals, the inclusions were mainly consisted of Ti-oxide and Mn-oxide, and the average size of inclusions was 0.7 ㎛. The 800 ㎫ grade weld metal exhibited higher tensile strength and similar toughness compared with the 600 ㎫ grade weld metal. This result is mainly due to a higher fraction of low temperature products and a lower fraction of grain boundary ferrite in the 800 ㎫ grade weld metal.
목차
Abstract
1. 서론
2. 실험방법
3. 결과 및 고찰
4. 결론
Reference
참고문헌 (17)
참고문헌 신청
1. [단행본] - S.Liu / 1990 / Welding Theory and Practice, Part 3
2. [학술지(정기간행물)] - J.M.Dowling / 1986 / Inclusion phases and the nucleation of acicular ferrite in submerged arc welds in high strength low alloy steels / Metallurgical Transactions A 17 : 1611 ~ 1623
3. [학술지(정기간행물)] - R.A.Farrar / 1993 / The effect of prior austenite grain size on the transformation behaviour of C-Mn-Ni weld metal / Journal of Materials Science 28 : 1385 ~ 1390
4. [학술지(정기간행물)] - Beomjoo Kim / 2005 / Effects of inclusions and microstructures on impact energy of high-input Submerged-Arc-Weld metals / Journal of Engineering Materials and Technology 127 : 204 ~ 213
5. [학술지(정기간행물)] - S.Liu / 1987 / The influence of inclusion chemical composition on weld metal microstructure / Journal of Materials Engineering 9 : 237 ~ 251
2. [학술지(정기간행물)] - J.M.Dowling / 1986 / Inclusion phases and the nucleation of acicular ferrite in submerged arc welds in high strength low alloy steels / Metallurgical Transactions A 17 : 1611 ~ 1623
3. [학술지(정기간행물)] - R.A.Farrar / 1993 / The effect of prior austenite grain size on the transformation behaviour of C-Mn-Ni weld metal / Journal of Materials Science 28 : 1385 ~ 1390
4. [학술지(정기간행물)] - Beomjoo Kim / 2005 / Effects of inclusions and microstructures on impact energy of high-input Submerged-Arc-Weld metals / Journal of Engineering Materials and Technology 127 : 204 ~ 213
5. [학술지(정기간행물)] - S.Liu / 1987 / The influence of inclusion chemical composition on weld metal microstructure / Journal of Materials Engineering 9 : 237 ~ 251
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UCI(KEPA) : I410-ECN-0101-2012-581-004322704