Joint strength evaluation of friction stir welded Al-Cu dissimilar alloys

Shankar, Sachindra; Vilaça, Pedro; Dash, Priyabrat; Chattopadhyaya, Somnath; Hloch, Sergej

doi:10.1016/j.measurement.2019.07.019

Cited by 54 publications

(29 citation statements)

References 26 publications

(32 reference statements)

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“…Solid state welding is considered as favorable processing condition for Al-Cu joints, as it operates below the melting point and with plastic deformation of materials [4][5][6]. Being a solid state welding family, friction stir welding (FSW), friction stir spot welding (FSSW), and other friction based welding processes are reported with large numbers in recent literature for different dissimilar combinations including Al-Cu [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Metallurgical and Mechanical Properties of Al–Cu Joint by Friction Stir Spot Welding and Modified Friction Stir Clinching

2020

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Dissimilar joints of AA5083 and pure Cu joint are successfully produced and compared by friction stir spot welding and modified friction stir clinching with intermediate layer of Zn interlayer for the first time. Self-reacting behavior of Zn is observed to obtain sound welds resulted from intermixing in stir zone (in FSSW), refilled zone (in MFSC) and brazed zone (in both FSSW and MFSC). MFSC is used to fill the cavity of keyhole that in turn increased 40 % strength of dissimilar Cu-Al joints. Presence of lamellar eutectics in brazed zone and intermetallic compounds such as Al2Cu, Al4Cu9, CuZn5 and Cu4Zn in weld zone are confirmed in Cu-Al MFSC joints.

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Section: Introductionmentioning

confidence: 99%

Metallurgical and Mechanical Properties of Al–Cu Joint by Friction Stir Spot Welding and Modified Friction Stir Clinching

2020

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“…Due to the formation of a large number of intermetallic compounds, the mechanical resistance of the joint needs to be improved. Sachindra Shankar et al [ 24 ] studied the successful preparation of AA1050 and oxygen-free copper with different thicknesses by friction stir welding. In the interface structure of Al-Cu, a layer of Al 4 Cu 9 and Al 2 Cu intermetallic compounds (IMCs) with a thickness of 2.2–0.26 μm was formed at different welding speeds.…”

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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“…Nevertheless, there are large IMC-free areas composed of unreacted Cu and Al. Formation of Al2Cu IMCs on the Cu/Al interfaces during FSW was noted in the majority of works dedicated to dissimilar FSW[24][25][26][27]29,30].…”

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confidence: 99%

Microstructure of In-Situ Friction Stir Processed Al-Cu Transition Zone

Zykova

Чумаевский

Gusarova

et al. 2020

Metals

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The majority of literature sources dedicated to dissimilar Al-Cu friction stir welding testifies to the formation of intermetallic compounds (IMC) according to diffusion-controlled reactions, i.e., without liquation on the Al/Cu interfaces. Fewer sources report on revealing Al-Cu eutectics, i.e., that IMCs are formed with the presence of the liquid phase. This work is an attempt to fill the gap in the results and find out the reasons behind such a difference. Structural-phase characteristics of an in-situ friction stir processed (FSP) Al-Cu zone were studied. The single-pass FSPed stir zone (SZ) was characterized by the presence of IMCs such as Al2Cu, Al2Cu3, AlCu3, Al2MgCu, whose distribution in the SZ was extremely inhomogeneous. The advancing side SZ contained large IMC particles as well as Al(Mg,Cu) solid solution (SS) dendrites and Al-Al2Cu eutectics. The retreating side SZ was composed of Al-Cu solid solution layered structures and smaller IMCs. Such a difference may be explained by different levels of heat input with respect to the SZ sides as well as by using lap FSP instead of the butt one.

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Joint strength evaluation of friction stir welded Al-Cu dissimilar alloys

Cited by 54 publications

References 26 publications

Metallurgical and Mechanical Properties of Al–Cu Joint by Friction Stir Spot Welding and Modified Friction Stir Clinching

Metallurgical and Mechanical Properties of Al–Cu Joint by Friction Stir Spot Welding and Modified Friction Stir Clinching

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

Microstructure of In-Situ Friction Stir Processed Al-Cu Transition Zone

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