Microstructural characterisation of interfaces in magnetic pulse welded aluminum/aluminum joints

Sharafiev, S.; Pabst, C.; Wagner, M. F.-X.; Groche, P.

doi:10.1088/1757-899x/118/1/012016

Microstructural characterisation of interfaces in magnetic pulse welded aluminum/aluminum joints (bibtex)

by S. Sharafiev, C. Pabst, M. F.-X. Wagner, P. Groche

Abstract:

Electromagnetic pulse welding provides novel and useful solutions in the field of multi-material structures. The joining occurs through the high-energy mechanical impact of metal sheets, which leads to a strong, cohesive, metallic bonding between the sheets. The high- velocity collision results in changes of the microstructure in the regions adjacent to the interface. The aim of this work is the microstructural characterization of the interface and the welding zone of Al/Al joints. One typical interface is analysed by optical and electron microscopy and using the electron backscatter diffraction technique. Our results show that the interface exhibits a well-known type of wavy weld geometry. Moreover, the formation of an intermediate layer that is different from the bulk aluminium structure is observed. The microstructure of this intermediate layer consists of ultrafine grains and in some regions exhibits a columnar grain structure. It is likely that this special microstructure (which plays an important role in determining the cohesive, continuous bonding between the metal sheets) is formed through a rapid melting and crystallisation process in the interface region.

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Reference:

Sharafiev, S., Pabst, C., Wagner, M. F.-X., Groche, P.: Microstructural characterisation of interfaces in magnetic pulse welded aluminum/aluminum joints, IOP Conf. Ser.: Mater. Sci. Eng. 118, 012016, 2016.

Bibtex Entry:

@Article{SharafievPabstWagnerEtAl2016,
  Title                    = {Microstructural characterisation of interfaces in magnetic pulse welded aluminum/aluminum joints},
  Author                   = {Sharafiev, S. and Pabst, C. and Wagner, M. F.-X. and Groche, P.},
  Journal                  = {{IOP} Conf. Ser.: Mater. Sci. Eng.},
  Year                     = {2016},

  Month                    = {mar},
  Pages                    = {012016},
  Volume                   = {118},

  Abstract                 = {Electromagnetic pulse welding provides novel and useful solutions in the field of multi-material structures. The joining occurs through the high-energy mechanical impact of metal sheets, which leads to a strong, cohesive, metallic bonding between the sheets. The high- velocity collision results in changes of the microstructure in the regions adjacent to the interface. The aim of this work is the microstructural characterization of the interface and the welding zone of Al/Al joints. One typical interface is analysed by optical and electron microscopy and using the electron backscatter diffraction technique. Our results show that the interface exhibits a well-known type of wavy weld geometry. Moreover, the formation of an intermediate layer that is different from the bulk aluminium structure is observed. The microstructure of this intermediate layer consists of ultrafine grains and in some regions exhibits a columnar grain structure. It is likely that this special microstructure (which plays an important role in determining the cohesive, continuous bonding between the metal sheets) is formed through a rapid melting and crystallisation process in the interface region.},
  Doi                      = {10.1088/1757-899x/118/1/012016},
  Publisher                = {{IOP} Publishing},
  Url                      = {http://dx.doi.org/10.1088/1757-899X/118/1/012016}
}