The role of tool offset on the microstructure and mechanical properties of Al/Cu friction stir welded joints

Hou, Wentao; Shah, L. H.; Huang, Guoqiang; Shen, Yifu; Gerlich, A.P.

doi:10.1016/j.jallcom.2020.154045

Cited by 70 publications

(34 citation statements)

References 28 publications

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“…The connection is mainly realized by the plastic flow of high-temperature metal, which effectively avoids the solidification of structural defects such as pores and inclusions caused by melting welding. It has outstanding technical advantages in dissimilar metal connection [10][11][12][13][14][15]. However, connections between aluminum-magnesium, aluminum-copper and other dissimilar materials are still in the exploratory research stage.…”

Section: Introductionmentioning

confidence: 99%

Effect of Post-Weld Annealing on Microstructure and Growth Behavior of Copper/Aluminum Friction Stir Welded Joint

Jin

et al. 2020

Materials

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Friction stir welding of 1016 pure aluminum and T2 pure copper with 2 mm thickness was carried out in the form of lap welding of copper on the upper side and aluminum on the lower side. The growth of interface microstructure between 1016 pure aluminum and T2 pure copper welded by friction stir welding was studied. The growth mechanism of the intermetallic compound (IMC) layer in the Cu-Al lap joint was revealed by annealing at 300, 350, 400 °C. The intermetallic compound (IMC) layer in the lap joint grows again during annealing, and only the original structure of the intermetallic compound (IMC) layer grows at lower annealing temperature and holding time. At higher annealing temperature and holding time, the original structure of intermetallic compound (IMC) layer no longer grows, and a new layered structure appears in the middle of the original structure. There is a gradient change of microhardness in the nugget zone. With different holding times, different softening phenomena appear in the metals on both sides of copper and aluminum. When the hardness decreases to a certain extent, it will not continue to decrease with the increase of holding time. When the annealing temperature is 350 °C and 400 °C, the strength of the tensile sample increases first and then decreases with the increase of holding time. At the interface of Cu-Al, the fracture runs through the whole intermetallic compound (IMC) layer.

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Section: Introductionmentioning

confidence: 99%

Effect of Post-Weld Annealing on Microstructure and Growth Behavior of Copper/Aluminum Friction Stir Welded Joint

Jin

et al. 2020

Materials

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“…This process allowed us to use more and more the alloys of non-ferrous metals which offer important mechanical characteristics [9,10], it also contributed to reduce the manufacturing costs [11,12], that is why we find so important, to focus our research on how to optimize the operation at low cost, while controlling the parameters, with the best plausible configuration, which will play a crucial role in the maintenance of structures, like the speed of the tool and welding, but also the tool geometry (Fig. 2).…”

Section: Pin Jointmentioning

confidence: 99%

Optimization of Ultimate Tensile Strength with DOE Approach for Application FSW Process in the Aluminum alloys AA6061-T651 & AA7075 -T651

Chaib

Slimane

Slimane³

et al. 2021

Frattura Ed Integrità Strutturale

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As it is imperative to control the materials development processes well, in parallel, it will be necessary to constantly adapt very efficient assembly methods. Friction stir welding makes it much easier for us to fusion the aluminum alloys like AA6061-T651 and AA7075 -T651. But we noted the difficulty of containing its many parameters such as the welding speed, the rotation speed and the type of pin used during the operation to optimize mechanical properties and in particular to obtain high rupture strength with the tensile test. This why in this paper we treat carefully this process in order to define it drastically, by using the design of experiment method which is an original approach that resides in the possibility of interpretation of experimental results with a minimal effort on the experimental level whichever generates the minimization of the necessary number of experiments and allows a saving in time and in financial cost.

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“…The tool shoulder then restricts further penetration while expanding the hot zone, and thus creates the joint in the workpieces [1,2]. Compared to conventional welding techniques, FSW generates fewer defects in the weld zone, such as porosity, hot cracking, inclusions, etc., with low energy consumption, thus offering an ecological and economical option [3][4][5][6]. In addition, FSW has relevant industrial applications in the automotive, aerospace, railway, nuclear and chemical industries [1,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, FSW has relevant industrial applications in the automotive, aerospace, railway, nuclear and chemical industries [1,7,8]. FSW has become one of the most successful methods of joining different materials, such as Al-Mg [9,10], Al-Ti [11,12], Al-Fe [13][14][15] and Al-Cu [2,4,5,7,[16][17][18][19], wherein physical, chemical, and thermal factors greatly influence the heat generated during the process, as well as the flow of materials, the microstructures, and the final mechanical properties of the weld.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis and Mathematical Model of FSW Parameter Effects on the Corrosion Rate of Al 6061-T6-Cu C11000 Joints

et al. 2021

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Friction stir welding is characterized as an ecological and low-cost process in comparison to traditional welding techniques, and due to its application in the solid state, it is a feasible option for joining similar and/or dissimilar materials. The present investigation seeks to determine the effect of friction stir welding’s parameters on the corrosion resistance of an Al 6061-T6–Cu C11000 dissimilar joint, with mathematical analysis to validate the results. After the welding process, the samples were exposed to a NaCl solution in an electrochemical cell to determine the corrosion rate via potentiodynamic tests. Microstructural characterization revealed a laminar structure, composed of aluminum and copper, as well as copper particles and the formation of intermetallic compounds distributed in the weld zone. The potentiodynamic tests showed that the corrosion rate increased with the rotational and traverse speeds. The mathematical model quantifies the relationship between corrosion rate and rotational and traverse speeds.

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The role of tool offset on the microstructure and mechanical properties of Al/Cu friction stir welded joints

Cited by 70 publications

References 28 publications

Effect of Post-Weld Annealing on Microstructure and Growth Behavior of Copper/Aluminum Friction Stir Welded Joint

Effect of Post-Weld Annealing on Microstructure and Growth Behavior of Copper/Aluminum Friction Stir Welded Joint

Optimization of Ultimate Tensile Strength with DOE Approach for Application FSW Process in the Aluminum alloys AA6061-T651 & AA7075 -T651

Experimental Analysis and Mathematical Model of FSW Parameter Effects on the Corrosion Rate of Al 6061-T6-Cu C11000 Joints

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