Friction stir lap welding of stainless steel and plain carbon steel to enhance corrosion properties

2018 ◽  
Vol 259 ◽  
pp. 259-269 ◽  
Author(s):  
G.R. Argade ◽  
S. Shukla ◽  
K. Liu ◽  
R.S. Mishra
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Plain Carbon Steel ◽  
Friction Stir Lap Welding ◽  
Corrosion Properties ◽  
Friction Stir ◽  
Lap Welding

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.

scholarly journals A Study of Diffusion Phenomenon in Friction Stir Lap Welding Joints for Low Carbon Steel C10 to Aluminum Alloy AA1100-H112

2018 ◽  
Vol 21 (4) ◽  
pp. 479-485
Author(s):  
Muna Khethier Abbass ◽  
Kareem Mohsen Raheef
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Welding Parameters ◽  
Low Carbon ◽  
Tensile Shear ◽  
Friction Stir Lap Welding ◽  
Friction Stir ◽  
Diffusion Phenomenon ◽  
Microhardness And Microstructure ◽  
Lap Welding

In this study the friction stir lap welding was carried out by a new technique (diffusion bonding phenomenon) between (AA1100 and low carbon steel C10 sheets of 3mm and 1mm thickness respectively. These alloys have difference ranges in melting temperature and other physical properties.  Different parameters were used: tool rotation speeds (630, 1250) rpm, travel speeds (80, 32) mm/min. and pin length (2.8,3) mm  using cylindrical threaded pin. Many tests and inspections were performed such as tensile shear test and X-Ray diffraction tests. Microhardness and microstructure observations were conducted by using optical and SEM. The above tests were used to evaluate the weld quality and joint efficiency under different welding parameters. Best result for  FSLW by  diffusion phenomenon  appear in (low carbon steelC10 / AA1100-H112) joint at 1250rpm  in 32 mm/min. with 2.8mm pin length and the maximum tensile shear strength was (3.9)KN.It was found that the highest micro hardness was (138HV) at the interface between the low carbon steel and AA1100.

Micro friction stir lap welding of AISI 430 ferritic stainless steel: a study on the mechanical properties, microstructure, texture and magnetic properties

2018 ◽  
Vol 115 (3) ◽  
pp. 307
Author(s):  
Hossein Mostaan ◽  
Mehdi Safari ◽  
Arash Bakhtiari
Keyword(s):  
Stainless Steel ◽  
Magnetic Properties ◽  
Friction Stir Welding ◽  
Ferritic Stainless Steel ◽  
Friction Stir Lap Welding ◽  
Friction Stir ◽  
Change Mechanism ◽  
Lap Welding ◽  
Field Emission Electron Microscopy ◽  
Aisi 430

In this study, the effect of friction stir welding of AISI 430 (X6Cr17, material number 1.4016) ferritic stainless steel is examined. Two thin sheets with dimensions of 0.4 × 50 × 200 mm3 are joined in lap configuration. Optical microscopy and field emission electron microscopy were used in order to microstructural evaluations and fracture analysis, respectively. Tensile test and microhardness measurements are employed in order to study the mechanical behaviors of welds. Also, vibrational sample magnetometry (VSM) is employed for characterizing magnetic properties of welded samples. Texture analysis is carried out in order to clarify the change mechanism of magnetic properties in the welded area. The results show that AISI 430 sheets are successfully joined considering both, the appearance of the welding bead and the strength of the welded joint. It is found that by friction stir welding of AISI 430 sheets, texture components with easy axes magnetization have been replaced by texture components with harder magnetization axes. VSM analysis showed that friction stir welding leads to increase in residual induction (Br) and coercivity (Hc). This increase is attributed to the grain refining due the friction stir welding and formation of texture components with harder axes of magnetizations.

Pyrolytic carbon filaments and associated catalytic particles formed in steel tubes

1984 ◽  
Vol 42 ◽  
pp. 662-663
Author(s):  
Y. L. Chen ◽  
J. R. Bradley
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Catalyst Particle ◽  
Pyrolytic Carbon ◽  
Plain Carbon Steel ◽  
304 Stainless Steel ◽  
Hydrocarbon Gases ◽  
Steel Tubes ◽  
Filamentous Carbon ◽  
Carbon Filaments

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.

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