Journal Published Online: 12 March 2019
Volume 48, Issue 2

High-Temperature Cyclic Oxidation of 800H Superalloy at 750°C–950°C in Air



High-temperature oxidation behavior of iron-based superalloy (800H) was investigated at 750°C, 850°C, and 950°C in air for 96 h. Weight gain was used to determine the kinetics of oxidation. The surface of the alloy was characterized by using scanning electron microscopy, X-ray diffraction, and energy dispersive X-ray spectroscopy after oxidation process. The results showed that mass gain increased rapidly in the initial stage of oxidation at high temperature. The alloy obeyed parabolic behavior at 750°C, 850°C, and 950°C. The oxide layer mainly contains oxides of chromium oxide, nickel oxide, iron oxide, and spinel chromium nickel oxide. The thickness of the oxide scales increased with time and temperature.

Author Information

Emam, Islam S.
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, PR China
Saber, D.
Industrial Engineering Department, Taif University, Taif, Saudi Arabia
Waheed, A.
Petroleum and Metallurgy Department, Cairo University, Cairo, Egypt
Pages: 11
Price: $25.00
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Stock #: JTE20170594
ISSN: 0090-3973
DOI: 10.1520/JTE20170594