Microstructure and toughness of thick-gauge pipeline steel joint via double-sided friction stir welding combined with preheating

被引：4
|
作者：
Xie, Guangming [1 ]
Duan, Ruihai [1 ]
Wang, Yuqian [1 ]
Luo, Zong'an [1 ]
Wang, Guodong [1 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling & Automation, Shenyang 110819, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2023年 / 30卷 / 04期
关键词：
pipeline steel; thick-gauge plate; friction stir welding; microstructure; toughness; HEAT-AFFECTED ZONE; MARTENSITE-AUSTENITE CONSTITUENTS; FRACTURE-TOUGHNESS; IMPACT TOUGHNESS; MECHANICAL-PROPERTIES; NUGGET ZONE; TEMPERATURE; EVOLUTION; ALLOY;
D O I：
10.1007/s12613-022-2434-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fusion welding easily causes microstructural coarsening in the heat-affected zone (HAZ) of a thick-gauge pipeline steel joint. This is most significant in the inter-critically coarse-grained HAZ (ICCGHAZ), which considerably deteriorates the toughness of the joint. In the present work, 11-mm thick pipeline steel was joined by preheating and double-sided friction stir welding (FSW). A comparative study on the microstructure and toughness in the ICCGHAZs for FSW and gas metal arc welding (GMAW) was performed. The toughness in the ICCGHAZ for FSW was improved significantly than that in the ICCGHAZ for GMAW. Generally, the nugget zone (NZ) has a coarse microstructure in the FSW steel joint formed at the highest peak temperature. However, in the current study, the microstructure in the one-pass NZ was remarkably refined owing to the static recrystallization of ferrite. An excellent toughness was achieved in the NZ of the pipeline steel joint that employed FSW.
引用
收藏
页码：724 / 733
页数：10
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