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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2011.10
- 수록면
- 123 - 126 (4page)
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초록· 키워드
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In this study, numerical and experimental works carried out to analyze the effects of void size, reduction ratio, forming temperature and specimen rotation on void closure of 1.5% C high carbon steel un upsetting and cogging processes. After these processes, tensile test and microstructure analysis were carried out to check whether the void closure takes place and to analyze the mechanical properties according to the forging conditions. It was found from tensile test and microstructure analysis that the void closure takes place at the reduction ratio of about 30% regardless of forming temperature and void size in upsetting process. In cogging process, the opening and closing of void occurs repeatedly due to the rotation of specimen. It was observed in cogging process that the cylindrical void was changed to dumbbell shape when the reduction ratio increases. It means that the initial void closure at the positioned in the center of the speciment takes place and then final void closure happens near to surface of the specimen. In addition, the void closure occurred at the reduction ratio of about 30% as well. It swas also experimentally revealed that the higher elongation and strength were obtained at the forging temperature of 800 ℃ due to the smallyer and dispersed cementities.
목차
Abstract
1. 서론
2. 유한요소해석
3. 기공압착 실험
4. 결론
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UCI(KEPA) : I410-ECN-0101-2014-550-002378232