Characterization of a rapidly solidified iron-based superalloy

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02644793· OSTI ID:5786700

Smugeresky, J E

Rapidly-solidified powders of an iron-based superalloy were characterized before and after consolidation by hot isostatic pressing. Powders made by inert gas atomization were compared to powders made by centrifugal atomization. Although many of the powder characteristics were similar, the microstructures were not. The inert gas atomized powder structure is cellular while the centrifugally atomized powder structure is dendritic. In general the finer powder particles have the finer micro structure with the effect more noticeable in centrifugally atomized powders. After consolidation, the differences in microstructure are more dependent on the consolidation temperature and postconsolidation heat treatment than in the powder type or size. Higher consolidation temperatures and/or post-consolidation heat treatment will result in transformation of the as-solidified microstructures. The transformed microstructure and the mechanical properties can in some cases be related to the assolidified structure. Heat treatment is needed to obtain mechanical properties equivalent to those of ingot metallurgy processed material.

• Research Organization: Sandia National Laboratories, Livermore, CA 94550
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5786700
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 13A; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ATOMIZATION
CENTRIFUGATION
CRYSTAL STRUCTURE
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
HOT PRESSING
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
METALLURGY
MICROSTRUCTURE
PHASE TRANSFORMATIONS
POWDER METALLURGY
POWDERS
PRESSING
SEPARATION PROCESSES
SOLIDIFICATION
TEMPERATURE DEPENDENCE