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Materials 2015, 8(4), 1499-1512; doi:10.3390/ma8041499

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
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)
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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
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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