Investigation of zigzag line defects in friction stir welding of SS304 stainless steel

被引：6
|
作者：
Xiao, Chuanjun [1 ]
Taheri, Morteza [2 ]
Alizadeh, Hamed [3 ]
Palay, Mohammad Ali [3 ]
Zhang, Hongwei [1 ]
机构：
[1] Xijing Univ, Sch Mech Engn, Xian 710123, Peoples R China
[2] Iranian Res Org Sci & Technol IROST, Dept Adv Mat & New Energies, Tehran, Iran
[3] Islamic Azad Univ, Dept Mat Engn, Karaj Branch, Karaj, Iran
来源：
MATERIALS LETTERS | 2023年 / 351卷
关键词：
Friction stir welding; Zigzag line defect; Fracture toughness; Microstructure; Texture;
D O I：
10.1016/j.matlet.2023.135042
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The zigzag line defect (ZLD) formed in the stir zone (SZ) affects the microstructural and mechanical properties of the materials welded by friction stir welding (FSW). In this research, the cause of ZLD formation in the FSW of SS304 steel was analyzed. The results showed that this defect is formed under incomplete penetration conditions. Under such conditions, oxygen enters the SZ from the incomplete penetration site and linearly creates micro- and nano-voids of metal oxides. The formed oxide voids had high hardness, but due to crack nucleation, they showed low fracture toughness.
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页数：4
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