Heterogeneous Friction Stir Welding: Improved Properties in Dissimilar Aluminum Alloy Joints through Insertion of Copper Coupled with External Heating

Kandasamy, J.; Hussain, M. Manzoor; Rajesham, S.

doi:10.1080/10426914.2012.709340

Cited by 12 publications

(6 citation statements)

References 29 publications

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“…The sample EZn2 strength is further than 100% compared to Al base material is because of the reinforcement of the phase constitution [4] and uniform distribution of IMCs. This may also due to proper diffusion [4], thin and controlled formation of IMCs [6] and the formation of solid solution phase constitution strengthening [14,15]. The comparable reinforcement effect was also detected by other researchers [4,6].…”

Section: Tensile Properties and Micro-hardness Distributionsupporting

confidence: 74%

“…Other than the Al/Cu FSW with Zn as third material, researchers also studied on different materials with different alloying element using FSW as well as other welding processes. Kandasamy et al [6] conducted dissimilar Al alloys plates FSW with Cu as intermediate inclusion in the form of strip, granules and coating at the faying surface to improve weld strength. Shiri et al [7] examined the dispersal phenomenon of Al plate with insertion of thin Cu foil as well as a pure Zn foil to influence the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Effect of solid solution phase constitution on dissimilar Al/Cu FSW using Zn as an alloying element at the joint interface

2019

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The effect of Al/Zn/Cu binary and ternary solid solution phase constituents on metallurgical and mechanical properties of Al/Cu dissimilar friction stir welding using Zn as an alloying element was investigated. Because of Zn interlayer material binary intermetallic compounds (IMCs) such as AlCu, Al 2 Cu, Al .71 Zn .29 , CuZn 5 and ternary IMCs such as Al 4.2 Cu 3.2 Zn .7 are formed. These solid solution alloying phase constituents improved the weld properties of the joint. The tensile strength was enhanced by 13% for Zn alloying specimens compared with non-alloyed weld specimen and 104% of the Al base material due to the formation of thin and controlled IMCs and solid solution phase constitution strengthening as well as Orowan strengthening. The fractured surface with Zn alloying element suggested combination of ductile-brittle fracture and indicated transgranular failure. Micro-hardness with Zn alloying specimen is higher compared to the non-alloyed specimen for the existence of different IMCs at the stir-zone. The mapping analysis indicated that the thickness of the IMCs with Zn alloying was at micro-meter level. Phase constituent revealed that thin continuous and uniformly distributed binary and ternary phases are beneficial for the enhancement of mechanical and metallurgical qualities. Macrostructural views revealed variation in IMCs flows at non-alloyed and Zn alloying cases. Different weld zone reflected grain variations and finer grain at the weld nugget due to the nucleating effect of Zn interlayer.

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Section: Tensile Properties and Micro-hardness Distributionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Effect of solid solution phase constitution on dissimilar Al/Cu FSW using Zn as an alloying element at the joint interface

2019

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“…Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions INTRODUCTION In recent years, the joining of dissimilar materials has gained increasing importance, in particular for the purpose of reducing weight and for tailoring component properties. Joints of dissimilar materials are used in complex industrial structures [1][2][3][4][5] to confer both structural and economic advantages. Composite structures of steel and copper alloys are widely employed in the aerospace, machinery, chemical, metallurgical, and refrigeration industries.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Dissimilar Welding of H62 Brass-316L Stainless Steel Using Continuous-Wave Nd:YAG Laser

Shen

et al. 2014

Materials and Manufacturing Processes

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Continuous-wave Nd:YAG laser welding of H62 brass and 316L stainless steel was studied using welded joints made with different overlap configurations. Optical and scanning electron microscopies, energy-dispersive X-ray spectroscopy, and microhardness testing were used to analyze the microstructures and mechanical properties of the joints. The welded joints with the brass-on-steel overlap configuration exhibited better performance. Elemental diffusion and dissolution-in particular, the evaporation of zinc-were observed in the welded joints. Intermetallic compounds were absent in the joints because brass and stainless steel exhibit unlimited solid solubility. Finally, the microhardness of the joints was higher than that of the brass.

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“…However, another efficient way to reduce the formation of intermetallics to achieve defect-free weld is the use of an interlayer between two parent metal sheets as suggested by Ouyang et al [13]. Positive results have been reported for the use of copper interlayer in coating form for dissimilar friction stir welding of AA7075 and AA6061 alloys by J. Kandasamy et al [16]. Interlayer if used may act as a barrier between Al and Cu sheets and minimize formation of brittle intermetallics of Al-Cu system.…”

Section: Introductionmentioning

confidence: 99%

A preliminary investigation on microstructure and mechanical properties of dissimilar Al to Cu friction stir welds prepared using silver interlayer

Pandya

Menghani

2018

Metall Mater Eng

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Due to its solid-state nature, friction stir welding (FSW) process can be considered a better alternative for dissimilar welding metals. However, like fusion welding techniques, in friction stir welding growth of thick layers of brittle intermetallics -Cu9Al4 and CuAl2 is a significant issue. One solution to this problem is the use of the suitable interlayer material. Use of interlayer material modifies the joint microstructure with the replacement of thick, brittle intermetallics by more ductile intermetallics in a thin layer or particle form. The present study is a preliminary investigation about joining of AA6082-O to pure copper joints with and without silver (Ag) wire interlayer. Friction stir welded joints were characterized regarding optical microscopy, X-Ray Diffraction (XRD) analysis, microhardness measurement, tensile testing and Scanning Electron Microscopy (SEM) based fractography. The Al-Cu weld prepared using silver interlayer was stronger than without it. The higher strength of the weld with silver interlayer is attributed to the formation of a composite type of structure with intercalation of more ductile Ag2Al intermetallics along with dispersion of Ag particles in stir zone.

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Heterogeneous Friction Stir Welding: Improved Properties in Dissimilar Aluminum Alloy Joints through Insertion of Copper Coupled with External Heating

Cited by 12 publications

References 29 publications

Effect of solid solution phase constitution on dissimilar Al/Cu FSW using Zn as an alloying element at the joint interface

Effect of solid solution phase constitution on dissimilar Al/Cu FSW using Zn as an alloying element at the joint interface

Dissimilar Welding of H62 Brass-316L Stainless Steel Using Continuous-Wave Nd:YAG Laser

A preliminary investigation on microstructure and mechanical properties of dissimilar Al to Cu friction stir welds prepared using silver interlayer

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