Welding and mechanical properties of cast FAPY (Fe-16 at. % Al-based) alloy slabs

Conference · Tue Aug 01 04:00:00 EDT 1995

OSTI ID:416492

Sikka, V K; Goodwin, G M; Alexander, D J; Howell, C R

The low-aluminum-content iron-aluminum program deals with the development of a Fe-Al alloy with aluminum content such as a produce the minimum environmental effect at room temperature. The FAPY is an Fe-16 at. % Al-based alloy developed at the Oak Ridge National Laboratory as the highest aluminum-containing alloy with essentially no environmental effect. The chemical composition for FAPY in weight percent is: aluminum = 8.46, chromium = 5.50, zirconium = 0.20, carbon = 0.03, molybdenum = 2.00, yttrium = 0.10, and iron = 83.71. The cast ingots of the alloy can be hot worked by extrusion, forging, and rolling processes. The hot- worked cast structure can be cold worked with intermediate anneals at 800{degrees}C. Typical room-temperature ductility of the fine-grained wrought structure is 20 to 25% for this alloy. In contrast to the wrought structure, the cast ductility at room temperature is approximately 1% with a transition temperature of approximately 100 to 150{degrees}C, above which ductility values exceed 20%. The alloy has been melted and processed into bar, sheet, and foil. The alloy has also been cast into slabs, step-blocks of varying thicknesses, and shapes. The purpose of this section is to describe the welding response of cast slabs of three different thicknesses of FAPY alloy. Tensile, creep, and Charpy-impact data of the welded plates are also presented.

• Research Organization: Oak Ridge National Lab., TN (United States)
• OSTI ID: 416492
• Report Number(s): ORNL/FMP--95/1; CONF-9505204--; ON: DE96001412
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHARPY TEST
CHROMIUM ALLOYS
CREEP
DUCTILITY
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM ALLOYS
ROLLING
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
WELDING