Microstructures and Mechanical Properties of 304 Stainless Steel Joints by Focused Ultrasound-Assisted TIG Welding

被引：2
|
作者：
Yang, Qingfu [1 ,3 ]
Xu, Wanghui [1 ,2 ]
Xiao, Yifeng [3 ]
Xie, Weifeng [4 ]
Xiong, Jinye [3 ]
Zhang, Tian [1 ]
机构：
[1] Guangdong Acad Sci, China Ukraine Inst Welding, Guangzhou, Peoples R China
[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin, Peoples R China
[3] Xiangtan Univ, Sch Mech Engn, Xiangtan, Peoples R China
[4] Northeast Elect Power Univ, Sch Mech Engn, Jilin, Jilin, Peoples R China
来源：
METALLOGRAPHY MICROSTRUCTURE AND ANALYSIS | 2022年 / 11卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Focused ultrasound-assisted TIG; Stainless steel; Microstructure; Mechanical property; AUSTENITIC STAINLESS-STEEL; HYDROGEN; GAS;
D O I：
10.1007/s13632-022-00826-1
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The microstructure and mechanical properties of focused ultrasound-assisted TIG welds on 304 stainless steel were investigated. Compared with TIG welding, the weld depth and depth-to-width ratio of focused ultrasound-assisted TIG welding were increased by 200 and 256%, respectively. The microstructures of the focused ultrasound-assisted TIG weld were composed of austenite (98.3%) and ferrite (1.7%), and the ferrite content was higher than that of TIG welding (0.7%). The average grain size of focused ultrasound-assisted TIG weld was 32.8% smaller than that of TIG. The tensile strength and elongation of the focused ultrasound-assisted TIG joint were 764.3 +/- 18.1MPa and 66.3 +/- 3.4%, respectively, which were higher than the tensile strength (729.3 +/- 6.8MPa) and elongation (60.3 +/- 1.2%) of TIG welding. Due to the compression of arc and the stirring of the molten pool by focused ultrasound, the efficiency and penetration of focused ultrasound-assisted TIG welding were improved. The grains were refined, and the mechanical properties of joints were improved.
引用
收藏
页码：141 / 149
页数：9
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