Effect of Microstructure on Low-Temperature Fracture Toughness of a Submerged-Arc-Welded Low-Carbon and Low-Alloy Steel Plate

被引：3
作者：
Choi, Byeong Chan [1 ]
Kim, Byoungkoo [1 ]
Kim, Byung Jun [1 ]
Choi, Yong-Wook [1 ]
Lee, Sang Joon [1 ]
Jeon, Jong Bae [3 ]
Kim, Yangdo [2 ]
Kim, Hyoung Chan [1 ]
机构：
[1] Korea Inst Ind Technol, Dongnam Reg Div, Busan 46938, South Korea
[2] Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea
[3] Dong A Univ, Dept Mat Sci & Engn, Busan 49315, South Korea
来源：
METALS | 2021年 / 11卷 / 11期
关键词：
thick plate steel; low-carbon steel; submerged-arc welding; welding microstructure; impact test; HEAT-AFFECTED ZONE; CHARPY IMPACT PROPERTIES; MECHANICAL-PROPERTIES; YIELD RATIO; STRENGTH; FERRITE; DUCTILE; BAINITE; CGHAZ; CRACK;
D O I：
10.3390/met11111839
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigated the low-temperature fracture behavior of an 80-mm-thick low-carbon steel plate welded by submerged arc. The relationship between impact absorbed energy and ductility-brittle transition temperature (DBTT) based on the microstructures was evaluated through quantitative analysis on grain size and complex constituent phases using advanced EBSD technique. The microstructure formed differently depending on the heat affections, which determined fracture properties in a low-temperature environment. Among the various microstructures of the heat-affected zone (HAZ), acicular ferrite has the greatest resistance to low-temperature impact due to its fine interlocking formation and its high-angle grain boundaries.
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页数：16
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