Header menu link for other important links
X
Microstructural evolution and mechanical behavior of nickel aluminum bronze Cu-9Al-4Fe-4Ni-1Mn fabricated through wire-arc additive manufacturing
Published in Elsevier B.V.
2019
Volume: 30
   
Abstract
As a step forward toward the development of the next generation of nickel aluminum bronze (NAB) components using wire-arc additive manufacturing (WAAM), square bars were printed in the vertical direction. The as-built microstructure was characterized using multi-scale electron microscopy techniques, where the differences in phase formation were compared to the reference cast-NAB based on the solidification characteristics. The as-cast microstructure typically consists of Cu-rich α-matrix, and four types of intermetallic particles referred to as κ-phases. In the WAAM-NAB, the formation of κI was suppressed due to high cooling rates. The microstructure was finer and the volume fraction of intermetallic particles was significantly lower than that of the cast-NAB. Based on energy dispersive spectroscopy (EDS) technique and diffraction pattern analysis using transmission electron microscopy (TEM), the phases formed in the interdendritic regions were identified as κII (globular Fe3Al) and κIII (lamellar NiAl), whereas numerous fine (5–10 nm) Fe-rich κIV particles were precipitated uniformly within the α-matrix. Electron backscatter diffraction analysis revealed weak texture on both parallel and perpendicular planes to the building direction with (100) poles rotated away from the build direction. The WAAM-NAB sample exhibited considerably higher yield strength (˜88 MPa) and elongation (˜10%) than the cast-NAB, but the gain in the ultimate tensile strength was marginal. © 2019
About the journal
JournalData powered by TypesetAdditive Manufacturing
PublisherData powered by TypesetElsevier B.V.
ISSN22148604
Open AccessNo
Concepts (28)
  •  related image
    3d printers
  •  related image
    Additives
  •  related image
    Aluminum
  •  related image
    Aluminum alloys
  •  related image
    Binary alloys
  •  related image
    Diffraction
  •  related image
    Electron microscopy
  •  related image
    Electrons
  •  related image
    Energy dispersive spectroscopy
  •  related image
    High resolution transmission electron microscopy
  •  related image
    INTERMETALLICS
  •  related image
    Iron alloys
  •  related image
    Manganese alloys
  •  related image
    Mechanical properties
  •  related image
    Microstructural evolution
  •  related image
    Nickel
  •  related image
    Tensile strength
  •  related image
    Textures
  •  related image
    Wire
  •  related image
    AS CAST MICROSTRUCTURE
  •  related image
    Electron backscatter diffraction analysis
  •  related image
    Energy dispersive spectroscopies (eds)
  •  related image
    INTER-METALLIC PARTICLE
  •  related image
    NICKEL ALUMINUM BRONZES
  •  related image
    SOLIDIFICATION CHARACTERISTICS
  •  related image
    Ultimate tensile strength
  •  related image
    WIRE ARC
  •  related image
    Bronze