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Microstructure and mechanical properties of rapidly solidified Fe‐25%Cr‐5%Al ribbons produced by planar flow casting
Author(s) -
Jiménez José A.,
Frech Wolfgang,
Ruano Oscar A.,
Frommeyer Georg
Publication year - 1995
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199501120
Subject(s) - materials science , microstructure , ribbon , ultimate tensile strength , composite material , casting , texture (cosmology) , perpendicular , alloy , dimple , metallurgy , geometry , image (mathematics) , mathematics , artificial intelligence , computer science
Catalyst substrate foils of the highly oxidation resistant Fe‐25Cr‐5Al alloy (mass contents in %) with a thickness ranging from 40 to 180 μm have been produced by planar flow casting. The rapidly solidified ribbons showed a monophase ferritic microstructure of columnar grains. The grain size determined over a section parallel to the ribbon wheel side ranged from 5 μm for the thin ribbons (40 μm) to 18 μm for the thicker ones {180 μm). This anisotropic columnar solidification microstructure exhibits a strong <100> fiber texture, with the fiber axis nearly perpendicular to the plane of the ribbon. The position of the maximum in the pole figure was tilted from the center point toward the casting direction. Results of uniaxial tensile tests showed that only the yield stress data of the ribbons in the as‐cast condition are reproducible, whereas the ultimate tensile strength and the elongation to failure data show a wide scatter band. The fracture mode exhibits ductile features such as glide bands and dimples.