High-Temperature Oxidation of Fe3Al Intermetallic Alloy Prepared by Additive Manufacturing LENSReport as inadecuate




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Department of Advanced Materials and Technology, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland





Academic Editor: Marco Salerno

Abstract The isothermal oxidation of Fe-28Al-5Cr at% intermetallic alloy microalloyed with Zr and B <0.08 at% in air atmosphere, in the temperature range of 1000 to 1200 °C, was studied. The investigation was carried out on the thin-walled <1 mm elements prepared by Laser Engineered Net Shaping LENS from alloy powder of a given composition. Characterization of the specimens, after the oxidation, was conducted using X-ray diffraction XRD and scanning electron microscopy SEM, with back-scatter detector BSE and energy-dispersive X-ray spectroscopy EDS attachments. The investigation has shown, that the oxidized samples were covered with a thin, homogeneous α-Al2O3 oxide layers. The intensity of their growth indicates that the material lost its resistance to oxidation at 1200 °C. Structural analysis of the thin-walled components’ has not shown intensification of the oxidation process at the joints of additive layers. View Full-Text

Keywords: Fe3Al intermetallic alloys; oxidation at high temperatures; kinetic parameters; laser engineered net shaping; rapid manufacturing Fe3Al intermetallic alloys; oxidation at high temperatures; kinetic parameters; laser engineered net shaping; rapid manufacturing





Author: Radosław Łyszkowski

Source: http://mdpi.com/



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