Favorable Impact Toughness of High Heat Input Coarse-Grained HAZ in an Ultra-Low Carbon High-Strength Microalloyed Steel

Yulong Yang; Xiao Jia; Yaxin Ma; Ping Wang; Fuxian Zhu

doi:10.1007/s12540-022-01230-8

추천

검색

자료유형: 학술저널

저자정보: Yulong Yang (Northeastern University) Xiao Jia (Northeastern University) Yaxin Ma (Northeastern University) Ping Wang (Northeastern University) Fuxian Zhu (Northeastern University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.2

발행연도: 2023.2

수록면: 485 - 500 (16page)

DOI: 10.1007/s12540-022-01230-8

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

An ultra-low carbon (0.035 wt%) high-strength steel plate was produced. The coarse-grained heat-affected Zone (CGHAZ)was simulated with different heat inputs of 25–200 kJ/cm. The low-temperature impact toughness and microstructure ofCGHAZ were analyzed. The results indicated that the impact toughness of CGHAZ exhibited a favorable value at −20 °Cunder high heat input conditions. The Ti-containing complex inclusions stimulated the crack initiation and induced thenucleation of acicular microstructure. With the increase of heat inputs, the morphology of carbides or martensite–austenite(M–A) constituents changed from strip to block gradually, and the volume fraction decreased gradually, which increased thecrack initiation absorbed energy. The coarse grain boundary ferrite (GBF) occupied by massive low-angle grain boundarieswas not conducive to the crack propagation absorbed energy. In addition, the kinetic effective activation energy of GBF andacicular ferrite/granular bainite (AF/GB) were calculated to be ~175 kJ/mol and ~227 kJ/mol respectively, which revealedthe kinetic reason for the preferential precipitation of GBF.

#High heat input · CGHAZ · M–A constituents · Toughness · Inclusion

참고문헌 (0)

참고문헌 신청

참고문헌이 DBpia에서 서비스 중이라면, [참고문헌 신청]을 통해 등록해보세요

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!