Experimental Investigation of Three-Dimensional (3-D) Material Flow Pattern in Thick Dissimilar 2050 Friction-Stir Welds

Avettand-Fènoël, Marie-NoËlle; Taillard, Roland; Laye, Julien; Odièvre, Thierry

doi:10.1007/s11661-013-2015-1

Cited by 20 publications

(7 citation statements)

References 43 publications

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“…Moreover, the evolution of the transverse cross-sections of the Ni bearing joints according to the Ni interlayer thickness enable us to follow and understand the phenomenological mechanism of the onion ring zone formation. The onion rings are irregularly spaced by a distance which differs very often from the welding pitch (referred as the ratio between the welding speed and the rotational speed) (figures 11c and e), as already noted in a previous work [3233]. In the present case, it is worthy to note that the nugget is transversally asymmetrical and shifted towards the RS.…”

Section: Materials Flow -supporting

confidence: 78%

“…For instance, some studies emphasize the absence of onion rings using a smooth truncated pin [3536] contrary to other ones [36-3737-38]. However, in a general way, material flow during FSW varies according to the respective nature of the materials and tool, to the plates thickness [3233], to the lap or butt configuration in case of the hybrid materials, to the tool shape and dimensions and to the process parameters. Besides material flow is difficult to visualize all the more that it is studied neither in three dimensions nor in situ in the present case and that phase transformations can hide the deformation paths, particularly in steels.…”

Section: Discussionmentioning

confidence: 99%

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Effect of a Ni interlayer on microstructure and mechanical properties of WC-12Co cermet / SC45 steel friction stir welds

Avettand-Fènoël

Nagaoka

Fujii

et al. 2019

Journal of Manufacturing Processes

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Section: Materials Flow -supporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Effect of a Ni interlayer on microstructure and mechanical properties of WC-12Co cermet / SC45 steel friction stir welds

Avettand-Fènoël

Nagaoka

Fujii

et al. 2019

Journal of Manufacturing Processes

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“…The spacing between bands corresponds to the tool advance per reVolution. Gerlich et al [66] e Avettand-Fènoël et al [67] also consider that the SZ was made up of only two flows: 1) the flow generated by the pin and 2) that produced by the axial force and rotation of the shoulder [50]. However, these theories are devised for the flow of metal in joints of the same metal.…”

Section: Discussionmentioning

confidence: 99%

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Graciano-Uribe

Santos

2021

IJE

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In the last thirty years, the friction stir welding (FSW) process has achieved significant importance due to the satisfactory results derived from severe deformation and low heat input during the welded joint production. These elements have been considered to implement the FSW in different welded systems, including aluminum-steel joints. In these dissimilar joints, the main interest was to obtain a welded joint with acceptable mechanical behavior. Some papers recently focused on understanding dissimilar joints process, mainly on the metal flow and its response to corrosion. However, in Al-steel joints, the presence of steel particles in the nugget zone is routine, it alters both the mechanical and chemical behavior of welded joints. Thus, this work aims to evaluate the mechanisms that govern these particles' generation, the effect of offset on their formation, and proposing the material flow behavior, using the detached fragments as tracers. It was established that the offset controls the metal's fluidity, which allows the accumulation of steel fragments on the advanced side, and reducing its quantity, due to the decrease of irregularities in the Al-steel interface. Likewise, the metal flow was observed on the retreating side, with that mentioned in aluminum joints. In contrast, on the advanced side, there is a shear action, push down, and lateral movement towards the retreating side, driven by the high forging strength of the metal and the restriction imposed by the steel and the backing.

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“…Therefore, even if the pin length slightly exceeds the thickness of the upper plate, the Cu-Al interface cannot be penetrated. Meanwhile, due to the cold die effect of the underlying hard material and the rotational shear effect of the pin, tubular cups pattern will be formed at the edge of the pin tip [67]. Further studies by Boucherit et al [45] showed that an obvious onion zone (OZ) structure was formed in the rod-shaped cups by stacking layers of material released at the tip of the pin, as shown in Figure 5a.…”

Section: Materials Flowmentioning

confidence: 96%

Friction Stir Spot Welding of Aluminum and Copper: A Review

Zhang

Wang

et al. 2019

Materials

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Aluminum (Al) and copper (Cu) have been widely used in many industrial fields thanks to their good plasticity, high thermal conductivity and excellent electrical conductivity. An effective joining of dissimilar Al and Cu materials can make full use of the special characteristics of these two metals. Friction stir spot welding (FSSW), as an efficient solid-state welding method suitable for joining of dissimilar metal materials, has great prospects in future industrial applications. In this paper, the FSSW studies on Al-Cu dissimilar materials are reviewed. The research progress and current status of Al-Cu FSSW are reviewed with respect to tool features, macroscopic characteristics of welded joints, microstructures, defects in welds and mechanical properties of joints. In addition, some suggestions on further study are put forward in order to promote the development and progress of Al-Cu FSSW studies in several respects: material flow, thermal history, addition of intermediate layer, auxiliary methods and functionalization of Al-Cu FSSW joint.

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Experimental Investigation of Three-Dimensional (3-D) Material Flow Pattern in Thick Dissimilar 2050 Friction-Stir Welds

Cited by 20 publications

References 43 publications

Effect of a Ni interlayer on microstructure and mechanical properties of WC-12Co cermet / SC45 steel friction stir welds

Effect of a Ni interlayer on microstructure and mechanical properties of WC-12Co cermet / SC45 steel friction stir welds

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Friction Stir Spot Welding of Aluminum and Copper: A Review

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