scholarly journals A Correlation between the Ultimate Shear Stress and the Thickness Affected by Intermetallic Compounds in Friction Stir Welding of Dissimilar Aluminum Alloy–Stainless Steel Joints

Metals ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 179 ◽  
Author(s):  
Florent Picot ◽  
Antoine Gueydan ◽  
Mayerling Martinez ◽  
Florent Moisy ◽  
Eric Hug
Keyword(s):  
Stainless Steel ◽  
Shear Stress ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Intermetallic Compounds ◽  
Friction Stir ◽  
Ultimate Shear Stress ◽  
Steel Joints

Interfacial Reaction during Dissimilar Friction Stir Lap Welding of Aluminum Alloy to Stainless Steel

2014 ◽  
Vol 794-796 ◽  
pp. 389-394
Author(s):  
Tomo Ogura ◽  
Taichi Nishida ◽  
Makoto Takahashi ◽  
Hidehito Nishida ◽  
Mitsuo Fujimoto ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Intermetallic Compounds ◽  
Lap Joint ◽  
Friction Stir Lap Welding ◽  
Friction Stir ◽  
Transmission Electron ◽  
Lap Welding ◽  
Mixed Layers ◽  
Joining Process

A friction stir welded A3003 aluminum alloy /SUS304 stainless steel dissimilar lap joint was successfully produced. A sound joint that fractured at the base metal was obtained in the center region of the joint through the reaction layer of aluminum-rich intermetallic compounds with nanoorder thickness. The microstructural changes at the interface of the joint was examined by studying the hole left by the extracted welding tool produced at the end of the friction stir welding (FSW) bead using transmission electron microscopy (TEM). Mixed layers consisted of ultra-fined intermetallic compounds and stainless steel were observed. The stirred aluminum alloy flows onto the mixed layer after the tool transit and the joining was achieved. Based on the TEM observations, the joining process of the lap joint was also discussed.

Role of Induction Preheating on Tool Wear and Properties of Friction Stir Welded 409M Stainless Steel Joints

2015 ◽  
Vol 787 ◽  
pp. 401-405
Author(s):  
V.G. Vijay Prakaash ◽  
A. Vignesh ◽  
A.K. Lakshminarayanan ◽  
V. Balasubramanian
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Friction Stir Welding ◽  
Tool Wear ◽  
Friction Stir ◽  
Axial Forces ◽  
Degradation Analysis ◽  
Tool Profile ◽  
Steel Joints

An attempt is made to reduce the process forces and tool wear during friction stir welding of 409M ferritic stainless steel and to enhance the mechanical properties by induction preheating of base metal with different preheating temperatures at the leading of tool. It is observed that the preheating significantly decreased the longitudinal and axial forces. Tool degradation analysis was carried out to find out the loss of tool profile and material. Mechanical properties especially impact toughness values were increased due to significant reduction in the tool wear.

Dissimilar friction-stir welding of 430 stainless steel and 6061 aluminum alloy: Microstructure and mechanical properties of the joints

2018 ◽  
Vol 233 (9) ◽  
pp. 1791-1801 ◽  
Author(s):  
Sirvan Zandsalimi ◽  
Akbar Heidarzadeh ◽  
Tohid Saeid
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Tensile Fracture ◽  
Welding Parameters ◽  
6061 Aluminum Alloy ◽  
Friction Stir ◽  
Tool Offset ◽  
430 Stainless Steel

The effect of friction-stir welding parameters on the microstructure and the mechanical properties of the dissimilar 430 stainless steel and 6061 aluminum alloy joints were investigated. Optical and scanning electron microscopes in conjunction with energy dispersive X-ray analysis were employed to study the microstructure of the joints. Tensile and microhardness tests were used to evaluate the mechanical properties. The results showed that the best appearance quality was achieved at a rotational speed of 900 r/min, a traverse speed of 120 mm/min, and a tool offset of zero. The tool offset was the most effective parameter affecting the weld quality. The stir zone of the joints had a composite structure in which the dispatched steel particles were distributed in aluminum. The best interface quality belonged to the joints welded at an offset of zero, which had a serrated nature with mechanical locking of the dissimilar parts. However, at negative and positive values of offsets, formation of voids and microcracks reduced the tensile properties of the joints. The tensile fracture of the joints occurred in the heat affected zone of the aluminum part, which had the lowest hardness amount between the microstructural zones. The fracture surfaces of the tensile specimens showed bimodal behavior.

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