Mo 첨가 및 시편 방향에 따른 API X70 라인파이프강의 미세조직과 기계적 특성
(주)코리아스칼라
- 최초 등록일
- 2023.08.14
- 최종 저작일
- 2023.06
- 6페이지/ 어도비 PDF
- 가격 4,000원
* 본 문서는 배포용으로 복사 및 편집이 불가합니다.
서지정보
ㆍ발행기관 : 한국재료학회
ㆍ수록지정보 : 한국재료학회지 / 33권 / 6호
ㆍ저자명 : 오동규, 신승혁, 황병철
목차
1. 서 론
2. 실험 방법
3. 실험 결과 및 고찰
3.1. 미세조직
3.2. 기계적 성질
4. 결 론
Acknowledgement
영어 초록
This study aims to examine the correlation between microstructures and the mechanical properties of two highstrength API X70 linepipe steels with different specimen directions and Moaddition. The microstructure of the Mo-added steel has an irregularly shaped AF, GB matrix with pearlite because of the relatively large deformation in the non-recrystallization temperature region, while that of the Mo-free steel shows a PF matrix with bainitic microstructure. In the Mo-added steel, the M/A (martensite-austenite) in granular bainite (GB) and pearlite act as crack initiation sites with decreased upper shelf energy and an increased ductile to brittle transition temperature (DBTT). Regardless of Mo addition, all of the steels demonstrate higher strength and lower elongation in the T direction than in the L direction because of the short dislocation glide path and ease of pile-up at grain boundaries. In addition, the impact test specimens with T-L direction had a lower impact absorbed energy and higher DBTT than those with the L-T direction because the former exhibit shorter unit crack path compared to the latter.
참고 자료
없음