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

页数：16

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