caa a22 4500 445843934 CHVBK 20180317145353.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s11085-011-9237-7 doi (NATIONALLICENCE)springer-10.1007/s11085-011-9237-7 Increasing the Upper Temperature Oxidation Limit of Alumina Forming Austenitic Stainless Steels in Air with Water Vapor [Elektronische Daten] [M. Brady, K. Unocic, M. Lance, M. Santella, Y. Yamamoto, L. Walker] A family of alumina-forming austenitic (AFA) stainless steels is under development for use in aggressive oxidizing conditions from ~600-900°C. These alloys exhibit promising mechanical properties but oxidation resistance in air with water vapor environments is currently limited to ~800°C due to a transition from external protective alumina scale formation to internal oxidation of aluminum with increasing temperature. The oxidation behavior of a series of AFA alloys was systematically studied as a function of Cr, Si, Al, C, and B additions in an effort to provide a basis to increase the upper-temperature oxidation limit. Oxidation exposures were conducted in air with 10% water vapor environments from 800-1000°C, with post oxidation characterization of the 900°C exposed samples by electron probe microanalysis (EPMA), scanning and transmission electron microscopy, and photo-stimulated luminescence spectroscopy (PSLS). Increased levels of Al, C, and B additions were found to increase the upper-temperature oxidation limit in air with water vapor to between 950 and 1000°C. These findings are discussed in terms of alloy microstructure and possible gettering of hydrogen from water vapor at second phase carbide and boride precipitates. Springer Science+Business Media, LLC, 2011 Stainless steel nationallicence Third-element effect nationallicence Multi-phase alloy oxidation nationallicence Water vapor nationallicence Alumina nationallicence Internal oxidation nationallicence Brady M. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut Unocic K. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut Lance M. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut Santella M. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut Yamamoto Y. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut Walker L. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut Oxidation of Metals Springer-Verlag 75/5-6(2011-06-01), 337-357 0030-770X 75:5-6<337 2011 75 11085 https://doi.org/10.1007/s11085-011-9237-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-011-9237-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Brady M. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut NATIONALLICENCE 700 1- Unocic K. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut NATIONALLICENCE 700 1- Lance M. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut NATIONALLICENCE 700 1- Santella M. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut NATIONALLICENCE 700 1- Yamamoto Y. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut NATIONALLICENCE 700 1- Walker L. Division of Materials Science and Technology, Oak Ridge National Laboratory, 37831-6115, Oak Ridge, TN, USA aut NATIONALLICENCE 773 0- Oxidation of Metals Springer-Verlag 75/5-6(2011-06-01), 337-357 0030-770X 75:5-6<337 2011 75 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer