Hybrid-heat effects on electrical-current aided friction stir welding of steel, and Al and Mg alloys

Luo, Jian; Chen, Wei; Fu, Gen

doi:10.1016/j.jmatprotec.2014.07.005

Cited by 52 publications

(25 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Daryadel et al have investigated the effect of process parameters and the weight percentage of nanoalumina on the FSW of polymeric nanocomposite [20] and reported that there is no significance effect of process parameters on mechanical properties of the joints made. Luo et al [28] used hybrid welding process in which FSW was carried out along with the electric current heating. It was concluded that the current intensity influences the welding seam shape features.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints

Ethiraj

Sivabalan

Beena

et al. 2020

IJE

View full text Add to dashboard Cite

Friction stir welding is a relatively new solid state joining process, which is suitable for welding similar and dissimilar materials. The present research work concentrates on the effect of tool rotational speed on the tensile, microstructural properties and microhardness of the friction stir welded joints of different grades of austenitic stainless steel sheets. Four different tool rotational speeds are used in the experimentation while the other process parameters like traversing speed and the tool tilt angle are kept constant. The tensile testing, micrography and microhardness measurements were carried out in the welded samples. It is observed from the results of tensile testing that the joint made at the tool rotational speed of 1320 rpm has the maximum strength among the experimented speeds. The measured microhardness values at heat affected zone and parent metal zone have shown higher hardness than the weld zone. Fine and equi-axed grains are observed in the welded region at all experimented speeds with a negligible amount of transformation of austenite into martensite. These results have impact on the development of welding procedure for dissimilar stainless steel friction stir welding process.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints

Ethiraj

Sivabalan

Beena

et al. 2020

IJE

View full text Add to dashboard Cite

show abstract

“…(3) Using solid-state welding processes. Some studies consider friction welding, [65][66][67][68] friction stir welding, [58,[69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88] friction stir diffusion bonding, [89] ultrasonic welding, [90] roll bonding, [91][92][93] diffusion bonding, [64,75,[94][95][96][97][98] or hybrid processes [5] such as FSW assisted by diffusion bonding, [83] by an electrical current, [99] by gas tungsten arc welding, [100] or by a laser. [101] These solid-state welding processes require a significant heat input to ensure suitable steel plasticization or sufficient atomic mobility.…”

Section: Introductionmentioning

confidence: 99%

Effect of Steel Galvanization on the Microstructure and Mechanical Performances of Planar Magnetic Pulse Welds of Aluminum and Steel

Avettand-Fènoël

Khalil

Taillard

et al. 2018

Metall Mater Trans A

View full text Add to dashboard Cite

For the first time, planar joints between pure aluminum and galvanized or uncoated DP450 steel joints have been developed via magnetic pulse welding. Both present a wavy interface. The microstructure of the interfacial zone differs according to the joint. With uncoated steel, the interface is composed of discrete 2.5-lm-thick FeAl 3 intermetallic compounds and Fe penetration lamellae, whereas the interface of the pure Al-galvanized steel joint is bilayered and composed of a 10-nm-thick (Al) Zn solid solution and a few micrometers thick aggregate of Al-and Zn-based grains, arranged from the Al side to the Zn coating. Even if the nature of the interfacial zone differs with or without the steel coating, both welds present rather similar maximum tensile forces and ductility in shear lap testing.

show abstract

“…In addition to laser-assisted and ultrasonic-assisted process, researches have been performed to investigate effects of the electrical current on friction stir welding process. Luo et al [6] did electrically assisted friction stir welding of similar materials, including Mg alloy AZ31B, Al alloy 7075, and steel Q235B. They found that the resistant heat produced by the electrical current refined the grain size and increased the hardness of the welding nugget.…”

Section: Introductionmentioning

confidence: 99%

“…Since a high-density electrical current is required to pass through the welding zone, the design of the electrically assisted FSW experimental system can be challenging considering the insulation and maximizing the current density. Luo et al [6] developed an efficient way to maximize the current flow. Regarding the electrodes configurations, one electrode was connected to the welding tool through a brush and the other electrode was connected to the conductive brick attached to the backing plate.…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Resistance Spot Welding of Aluminum Alloy to Advanced High Strength Steel

Chen

Liu

2018

Journal of Manufacturing Science and Engineering

View full text Add to dashboard Cite

A hybrid friction stir resistance spot welding (RSW) process is applied for joining aluminum alloy 6061 to TRIP 780 steel. Compared with conventional RSW, the applied current density is lower and the welding process remains in the solid state. Compared with conventional friction stir spot welding (FSSW) process, the welding force is reduced and the dissimilar material joint strength is increased. The electrical current is applied in both a pulsed and direct form. With the equal amount of energy input, the approximately same force reduction indicates that the electro-plastic material softening effect is insignificant during FSSW process. The welding force is reduced mainly due to the resistance heating induced thermal softening of materials. With the application of electrical current, a wider aluminum flow pattern is observed in the thermo-mechanically affected zone (TMAZ) of weld cross sections and a more uniform hook is formed at the Fe/Al interface. This implies that the aluminum material flow is enhanced. Moreover, the Al composition in the Al–Fe interfacial layer is higher, which means the atomic diffusion is accelerated.

show abstract

Hybrid-heat effects on electrical-current aided friction stir welding of steel, and Al and Mg alloys

Cited by 52 publications

References 15 publications

Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints

Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints

Effect of Steel Galvanization on the Microstructure and Mechanical Performances of Planar Magnetic Pulse Welds of Aluminum and Steel

Friction Stir Resistance Spot Welding of Aluminum Alloy to Advanced High Strength Steel

Contact Info

Product

Resources

About