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Influence of Carbon Content and Isothermal Heat Treatment Temperature on the Microstructure and Mechanical Properties of Ultra-High Strength Bainitic Steels
초고강도 베이나이트강의 미세조직과 기계적 성질에 미치는 탄소함량과 항온열처리 온도의 영향
Seung Hwangbo, Hong-Bum Lee, Young-Beum Song, Jinhee Ham, Hong-Kyu Kim, Dong-Woo Suh
황보승, 이홍범, 송영범, 함진희, 김홍규, 서동우
Korean J. Met. Mater. 2019;57(6):335-342.   Published online 2019 May 16
DOI: https://doi.org/10.3365/KJMM.2019.57.6.335

Abstract
The effect of carbon content and isothermal heat treatment conditions on the microstructure evolution and mechanical properties of ultra-high strength bainitic steels was investigated. A reduction in carbon content from 0.8 wt% to 0.6 wt% in super-bainite steel with typical chemistry effectively improved not only the Charpy impact toughness but..... More

                        
Effects of Si on the Characteristics of FCA Multi-Layer Weld Metal with 460 MPa Yield Strength Grade Steels for Ships and Marine Structures
선박 및 해양구조물용 항복강도 460 MPa급 강재의 FCA 다층 용접금속부 특성에 미치는 규소의 영향
Jong-Sig Kim, Myeong-Soo Lee, Jong-Min Jung, Han-Geul Choi, Sang-Hoon Jeong, Chang-Yong Kang
김종식, 이명수, 정종민, 최한글, 정상훈, 강창룡
Korean J. Met. Mater. 2018;56(7):499-504.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.499

Abstract
This study investigated the effect of Si on the characteristics of FCA multi-layer weld metal with 460 MPa yield strength grade steels for ships and marine structures. The effect on microstructure was evaluated by tensile, charpy impact and CTOD testing of 4 FCAW welds containing various C and Si contents...... More

                           Cited By 1
Mechanical Behavior
Sensitivity of Microstructural Factors Influencing the Impact Toughness of Hypoeutectoid Steels with Ferrite-Pearlite Structure using Multiple Regression Analysis
다중회귀분석을 이용한 페라이트-펄라이트 조직 아공석강의 충격인성에 미치는 미세조직적 인자의 민감도 해석
Seung-Yong Lee, Sang-In Lee, Byoungchul Hwang
이승용, 이상인, 황병철
Korean J. Met. Mater. 2016;54(9):637-644.   Published online 2016 Sep 5
DOI: https://doi.org/10.3365/KJMM.2016.54.9.637

Abstract
In this study, the effect of microstructural factors on the impact toughness of hypoeutectoid steels with ferrite-pearlite structure was quantitatively investigated using multiple regression analysis. Microstructural analysis results showed that the pearlite fraction increased with increasing austenitizing temperature and decreasing transformation temperature which substantially decreased the pearlite interlamellar spacing and..... More

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