Effect of ultrasonic vibration on microstructures and mechanical properties of friction stir welded 2195 Al-Li alloy

被引：2
|
作者：
Dai, Xiang [1 ]
Shi, Lei [1 ]
Tian, Chun-yan [1 ]
Wu, Chuan-song [1 ]
Gao, Song [2 ]
机构：
[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China
[2] Qilu Univ Technol, Shandong Acad Sci, Sch Mech Engn, Jinan 250353, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2024年 / 34卷 / 01期
基金：
中国国家自然科学基金;
关键词：
2195-T6 Al-Li alloy; friction stir welding; ultrasonic vibration enhanced friction stir welding; welding speed; grain structure; joint properties; MATERIAL FLOW; ROTATION SPEED; WELDING SPEED; BUTT JOINTS; EVOLUTION; BEHAVIOR;
D O I：
10.1016/S1003-6326(23)66383-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A novel ultrasonic vibration enhanced friction stir welding (UVeFSW) was employed to join the thirdgeneration 2195-T6 Al-Li alloy, and the effect of ultrasonic vibration on microstructures and mechanical properties of the joint was studied. It is revealed that UVeFSW can enhance the plastic material flow to suppress the weld defects. The critical welding speed of sound joints is increased in UVeFSW compared with conventional FSW. When ensuring that the tensile strength of the joint is 75% that of the base material, the welding speed and efficiency in UVeFSW are higher than those in conventional FSW. Superimposing ultrasonic vibration can significantly enhance the mechanical properties of 2195 Al-Li alloy FSW joints at a higher welding speed. The maximum tensile strength of the UVeFSW joint is 449.5 MPa, which is 83.1% that of the base material. UVeFSW can increase the welding efficiency by increasing the critical welding speed and simultaneously ensuring the joint properties.
引用
收藏
页码：80 / 93
页数：14
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