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Open AccessArticle

High-Temperature Oxidation of Fe3Al Intermetallic Alloy Prepared by Additive Manufacturing LENS

Department of Advanced Materials and Technology, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland
Academic Editor: Marco Salerno
Materials 2015, 8(4), 1499-1512; https://doi.org/10.3390/ma8041499
Received: 15 January 2015 / Revised: 9 March 2015 / Accepted: 19 March 2015 / Published: 30 March 2015
(This article belongs to the Special Issue Intermetallic Alloys: Fabrication, Properties and Applications)
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
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MDPI and ACS Style

Łyszkowski, R. High-Temperature Oxidation of Fe3Al Intermetallic Alloy Prepared by Additive Manufacturing LENS. Materials 2015, 8, 1499-1512.

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