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Gefüge und Ursache von intermetallischen Phasen beim Magnetpulsschweißen von Aluminium und Stahl
Author(s) -
Böhme M.,
Sharafiev S.,
Schumacher E.,
Böhm S.,
Wagner M.F.X.
Publication year - 2019
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201900034
Subject(s) - materials science , nanocrystalline material , microstructure , welding , scanning electron microscope , metallurgy , transmission electron microscopy , intermetallic , amorphous solid , electron backscatter diffraction , cold welding , layer (electronics) , electron diffraction , energy dispersive x ray spectroscopy , composite material , diffraction , laser beam welding , crystallography , optics , gas metal arc welding , chemistry , alloy , nanotechnology , physics
The microstructure of aluminum‐steel compounds fabricated by magnetic pulse welding are investigated. Electron backscatter diffraction, energy dispersive x‐ray spectroscopy and scanning electron microscopy revealed the existence of several different phases along the weld seam. While one layer could be identified as aluminum solid solution, a very thin layer close to the steel side of the compound eluded detailed characterization by scanning electron microscopy techniques. Transmission electron microscopy and selected area electron diffraction investigations of this layer revealed a mix of nanocrystalline and amorphous parts. When ambient pressure was reduced to 1 mbar during welding, no interlayers were observed in the samples. This suggests that the interlayers are precipitates of the jet that is formed during conventional impact welding.