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Title: Effect of Aluminizing on the High-Temperature Oxidation Behavior of an Alumina-Forming Austenitic Stainless Steel

Abstract

Due to their excellent oxidation resistance and creep resistance at elevated temperatures, alumina forming austenitic (AFA) stainless steels have emerged as potential alloys for high temperature applications. In this study, a Reactive Air Aluminizing (RAA) method was used to aluminize the surface of AFA25 stainless steel. The high temperature oxidation behavior of both as-received and aluminized AFA25 was investigated at 850 °C in dry air. The mass gain per unit area was higher for the aluminized AFA25 than for the as-received material. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS), performed on the oxide scales following the high temperature oxidation tests, confirmed the formation of alumina scale on both as-received and aluminized AFA. However, the aluminized alloy exhibited a thicker alumina scale on the surface, as well as more extensive penetration of the scale into the subsurface region of the alloy.

Authors:
; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1496568
Report Number(s):
PNNL-SA-138140
Journal ID: ISSN 1047-4838
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 71; Journal Issue: 1; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English

Citation Formats

Rashidi, S., Choi, J. P., Stevenson, J. W., Pandey, A., and Gupta, R. K. Effect of Aluminizing on the High-Temperature Oxidation Behavior of an Alumina-Forming Austenitic Stainless Steel. United States: N. p., 2018. Web. doi:10.1007/s11837-018-3155-y.
Rashidi, S., Choi, J. P., Stevenson, J. W., Pandey, A., & Gupta, R. K. Effect of Aluminizing on the High-Temperature Oxidation Behavior of an Alumina-Forming Austenitic Stainless Steel. United States. doi:10.1007/s11837-018-3155-y.
Rashidi, S., Choi, J. P., Stevenson, J. W., Pandey, A., and Gupta, R. K. Mon . "Effect of Aluminizing on the High-Temperature Oxidation Behavior of an Alumina-Forming Austenitic Stainless Steel". United States. doi:10.1007/s11837-018-3155-y.
@article{osti_1496568,
title = {Effect of Aluminizing on the High-Temperature Oxidation Behavior of an Alumina-Forming Austenitic Stainless Steel},
author = {Rashidi, S. and Choi, J. P. and Stevenson, J. W. and Pandey, A. and Gupta, R. K.},
abstractNote = {Due to their excellent oxidation resistance and creep resistance at elevated temperatures, alumina forming austenitic (AFA) stainless steels have emerged as potential alloys for high temperature applications. In this study, a Reactive Air Aluminizing (RAA) method was used to aluminize the surface of AFA25 stainless steel. The high temperature oxidation behavior of both as-received and aluminized AFA25 was investigated at 850 °C in dry air. The mass gain per unit area was higher for the aluminized AFA25 than for the as-received material. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS), performed on the oxide scales following the high temperature oxidation tests, confirmed the formation of alumina scale on both as-received and aluminized AFA. However, the aluminized alloy exhibited a thicker alumina scale on the surface, as well as more extensive penetration of the scale into the subsurface region of the alloy.},
doi = {10.1007/s11837-018-3155-y},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
issn = {1047-4838},
number = 1,
volume = 71,
place = {United States},
year = {2018},
month = {10}
}

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