Characteristics of Microstructure and Fracture Toughness According to the Groove Shape of Submerged Arc Welding

被引：0
|
作者：
Shin, Yong-Taek [1 ]
Jung, Chang-Ju [1 ]
Bae, Seong-Han [1 ]
An, Gyubaek [2 ]
Son, Myungrak [3 ]
Park, Young-Il [1 ]
机构：
[1] Dong A Univ, Dept Naval Architecture & Ocean Engn, Busan 49201, South Korea
[2] Chosun Univ, Dept Naval Architecture & Ocean Engn, Gwangju 61452, South Korea
[3] KISWEL Co Ltd, R&D Ctr, Busan 47018, South Korea
来源：
METALS | 2025年 / 15卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
submerged arc welding (SAW); groove shapes; cooling rate; crack tip opening displacement (CTOD); martensite-austenite constituents (MA); HEAT-TREATMENT; STEEL; DESIGN; ZONE;
D O I：
10.3390/met15010010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigates the effects of heat input on the microstructure and fracture toughness of SAW (Submerged Arc Welding) joints with K-groove and X-groove weld preparations using S460NL steel. Microstructural analysis focused on acicular ferrite, grain boundary ferrite, and MA (Martensite-Austenite) constituents to assess their influence on CTOD (Crack Tip Opening Displacement). The results indicate that the K-groove achieved a higher CTOD value of 0.82 mm compared to 0.13 mm for the X-groove, attributed to differences in microstructural composition and cooling rates. The findings highlight the impact of groove geometry and heat input on weld performance.
引用
收藏
页数：16
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