Effects of minor alloy additions and oxidation temperature on protective alumina scale formation in creep-resistant austenitic stainless steels

• DOI: 10.1016/j.scriptamat.2007.08.032
• Publication Date: 2007-09-22T11:23:45Z
• Authors: M.P. Brady; Y. Yamamoto; M.L. Santella; B.A. Pint
• Keywords: Austenitic stainless steel

Niobium was found to be beneficial for alumina scale formation in newly developed creep-resistant austenitic stainless steels. Additions of both Ti and V degraded alumina scale formation, whereas alloys with individual additions of Ti or V were able to form protective alumina scales. The ability to form external alumina scales was lost in the lower Al- and Nb-containing alloys between 800 and 900 °C. Compositions with the potential to form alumina at 900 °C were identified.