Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

2018 ◽  
Vol 89 (5) ◽  
pp. 1700427 ◽  
Author(s):  
Hamid Ashrafi ◽  
Morteza Shamanian ◽  
Rahmatollah Emadi ◽  
Mohammad Ahl Sarmadi
Keyword(s):  
Friction Stir Welding ◽  
Tensile Properties ◽  
Arc Welding ◽  
Dual Phase Steel ◽  
Gas Tungsten Arc Welding ◽  
Dual Phase ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Microstructure and Corrosion Behavior of Cast A356 and Wrought AA6061 Aluminium Alloy Welds

2010 ◽  
Vol 117 ◽  
pp. 37-42
Author(s):  
K.Ratna Kumar ◽  
G. Madhusudhan Reddy ◽  
K. Srinivasa Rao
Keyword(s):  
Corrosion Resistance ◽  
Electron Beam ◽  
Friction Stir Welding ◽  
Arc Welding ◽  
Electron Beam Welding ◽  
Gas Tungsten Arc Welding ◽  
Fusion Welding ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

In this work, it was intended to improve the corrosion resistance of welds of A356 and AA6061 by adopting mainly a special welding techniques, viz., pulsed current gas tungsten arc welding (PCGTAW), electron beam welding (EBW) and friction stir welding (FSW). It was found that the corrosion resistance of A356 and AA6061 welds could be improved by PCGTAW technique rather than continuous current gas tungsten arc welding (CCGTAW). It can be further improved by using electron beam welding. Improved corrosion resistance in A356 welds could be obtained by selecting T6 temper rather than as cast condition. In the case of AA6061, improved corrosion resistance was achieved by selecting T4 temper rather than T6 temper. As for as the welding techniques, friction stir welding (FSW) is useful than fusion welding techniques like CCGTAW,PCGTAW and EBW for improving the corrosion resistance of both the welds.

Friction Stir and Gas Tungsten Arc Welding of ZM21 Magnesium Alloy

2014 ◽  
Vol 909 ◽  
pp. 77-82
Author(s):  
Hari Krishna Kallipudi ◽  
Rama Koteswara Rao Sajja ◽  
Venkata Subba Rao Veera
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Arc Welding ◽  
Welding Process ◽  
Gas Tungsten Arc Welding ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Welding Processes

Magnesium alloy ZM21 plates were welded using friction stir welding, a solid state process and gas tungsten arc welding which is a fusion welding process. Defect free, full penetration welds were obtained after several trials using different process parameters. The effect of welding processes on mechanical properties of Mg-Zn-Mn joints were evaluated using tensile tests, bend test, vickers micro hardness measurements and optical microscopy. Welds produced by Friction stir welding process exhibited superior tensile properties compared to Gas Tungsten Arc Welding process. Hardness reduction in the weld metals were observed for both the welding techniques. Friction stir welds showed finer grains in the weld nugget and in the heat affected zone. Both types of welds exhibited good bend ductility comparable to that of the base material. It has been concluded that both the processes are well suited to obtain sound welds of the magnesium alloy ZM21 and Friction stir welding process offers stronger welds.

scholarly journals High speed welding of Friction-Stir-Welding for mild steel by Gas-Tungsten- Arc-Welding hybrid process

2018 ◽  
Vol 36 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Itto SUGIMOTO ◽  
Seung Hwan C. PARK ◽  
Satoshi HIRANO ◽  
Satoshi HATA ◽  
Yutaka S. SATO ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Mild Steel ◽  
Arc Welding ◽  
High Speed ◽  
Gas Tungsten Arc Welding ◽  
Hybrid Process ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

scholarly journals Friction Stir Welding of 2205 Duplex Stainless Steel: Feasibility of Butt Joint Groove Filling in Comparison to Gas Tungsten Arc Welding

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4597
Author(s):  
Mohamed M. Z. Ahmed ◽  
Khaled A. Abdelazem ◽  
Mohamed M. El-Sayed Seleman ◽  
Bandar Alzahrani ◽  
Kamel Touileb ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Friction Stir Welding ◽  
Duplex Stainless Steel ◽  
Arc Welding ◽  
Weld Zone ◽  
Gas Tungsten Arc Welding ◽  
Grain Refining ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

This work investigates the feasibility of using friction stir welding (FSW) process as a groove filling welding technique to weld duplex stainless steel (DSS) that is extensively used by petroleum service companies and marine industries. For the FSW experiments, three different groove geometries without root gap were designed and machined in a DSS plates 6.5 mm thick. FSW were carried out to produce butt-joints at a constant tool rotation rate of 300 rpm, traverse welding speed of 25 mm/min, and tilt angle of 3o using tungsten carbide (WC) tool. For comparison, the same DSS plates were welded using gas tungsten arc welding (GTAW). The produced joints were evaluated and characterized using radiographic inspection, optical microscopy, and hardness and tensile testing. Electron back scattering diffraction (EBSD) was used to examine the grain structure and phases before and after FSW. The initial results indicate that FSW were used successfully to weld DSS joints with different groove designs with defect-free joints produced using the 60° V-shape groove with a 2 mm root face without root gap. This friction stir welded (FSWed) joint was further investigated and compared with the GTAW joint. The FSWed joint microstructure mainly consists of α and γ with significant grain refining; the GTWA weld contains different austenitic-phase (γ) morphologies such as grain boundary austenite (GBA), intragranular austenite precipitates (IGA), and Widmanstätten austenite (WA) besides the ferrite phase (α) in the weld zone (WZ) due to the used high heat input and 2209 filler rod. The yield strength, ultimate tensile strength, and elongation of the FSWed joint are enhanced over the GTAW weldment by 21%, 41%, and 66% and over the BM by 65%, 33%, and 54%, respectively. EBSD investigation showed a significant grain refining after FSW with grain size average of 1.88 µm for austenite and 2.2 µm for ferrite.

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