Material flow investigation of aluminum alloy and steel dissimilar joints by Friction Stir Welding

2019 ◽  
Vol 2019.27 (0) ◽  
pp. 512
Author(s):  
Yuki OGURA ◽  
Toshiaki YASUI ◽  
Masahiro FUKUMOTO
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Dissimilar Joints ◽  
Friction Stir ◽  
Flow Investigation

scholarly journals Material-flow behavior during friction-stir welding of 6082-T6 aluminum alloy

2016 ◽  
Vol 87 (1-4) ◽  
pp. 1115-1123 ◽  
Author(s):  
Yongxian Huang ◽  
Yaobin Wang ◽  
Long Wan ◽  
Haoshu Liu ◽  
Junjun Shen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Flow Behavior ◽  
Friction Stir

scholarly journals Study on the Relationship between Root Metal Flow Behavior and Root Flaw Formation of a 2024 Aluminum Alloy Joint in Friction Stir Welding by a Multiphysics Field Model

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 913
Author(s):  
Jian Luo ◽  
Jiafa Wang ◽  
Hongxin Lin ◽  
Lei Yuan ◽  
Jianjun Gao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Welded Joint ◽  
Yield Criterion ◽  
Flow Behavior ◽  
Metal Flow ◽  
Bottom Surface ◽  
Line Defect ◽  
Friction Stir

In friction stir welding (FSW), many defects (such as kissing bond, incomplete penetration, and weak connection) easily occur at the root of the welded joint. Based on the Levy–Mises yield criterion of the Zener–Hollomon thermoplastic constitutive equation, a 3D thermal–mechanical coupled finite element model was established. The material flow behavior and the stress field at the root area of a 6 mm thick 2024-T3 aluminum alloy FSW joint were studied. The influence of pin length on the root flaw was investigated, and the formation mechanism of the “S line” defects and non-penetration defects were revealed. The research results showed that the “S line” defect forms near the bottom surface of the pin owing to the insufficiently mixed material from the advancing side (AS) and retreating side (RS) near the weld center. The non-penetration defect forms near the bottom surface of the workpiece owing to the insufficient driving force to make the material flow through the weld center. With the continual increase of pin length, the size of the “S line” defect and non-penetration defect reduces, and finally, the defect-free welded joint can be obtained with an optimized suitable length of the pin in this case.

scholarly journals Effect of Modified Pin Profile and Process Parameters on the Friction Stir Welding of Aluminum Alloy 6061-T6

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
J. C. Verduzco Juárez ◽  
G. M. Dominguez Almaraz ◽  
R. García Hernández ◽  
J. J. Villalón López
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Flow Behavior ◽  
Tensile Tests ◽  
Welding Parameters ◽  
Friction Stir ◽  
Aluminum Alloy 6061 ◽  
Alloy 6061

This work deals with the effect of a new “bolt-head” pin profile on the friction stir welding performance of the aluminum alloy 6061-T6, compared to traditional pin profiles. Friction stir welding parameters such as the tool rotation speed and the welding speed were investigated together with the different pin profiles; the results show that the new “bolt-head” pin profile leads to better mechanical properties of welded specimens. The pin profiles used in this work were the straight square (SS), straight hexagon (SH), taper cylindrical (TC), and the straight hexagon “bolt-head” (SHBH). It was found that the last pin profile improves the material flow behavior and the uniform distribution of plastic deformation and reduces the formation of macroscopic defects on the welded zone. Mechanical tensile tests on welded specimens were performed to determine the tensile strength: the specimens welded with the SHBH pin profile have shown the highest mechanical properties. An approach is presented for material flow on this aluminum alloy using the SHBH pin profile, which is related to the improvement on the resulting mechanical properties.

Sign in / Sign up

Export Citation Format

Share Document