Strengthening of Fe-Cr-Al-Y Oxidation Resistant Alloys.
Abstract
An investigation of oxide dispersion strengthening of oxidation resistant FeCrAlY alloys was conducted using both coarse and fine metal powder approaches. The most successful method involved preoxidizing and extruding coarse atomized powders. A detailed thermomechanical process (TMP) study of this material showed that 2000F tensile and stress rupture properties varied widely with rolling-heat treating schedules. Yield and tensile strengths at 2000F were found to increase with increasing volume fraction of oxide and with increasing rolling reduction, but were quite insensitive to grain size. Alloys with up to 4v/o oxide had good ductility. Rupture life at 2000F was found to increase with increasing grain size. Both static and dynamic oxidation testing was conducted. Static cyclic oxidation resistance was found to be equivalent to the base alloy without oxides, and 2100F/Mach 1/1 hour cyclic exposure did not accelerate oxidation kinetics. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 25, 1971
- Accession Number
- AD0727589
Entities
People
- Ross Allen
Organizations
- General Electric