Rapid solidification processing of iron-base alloys for structural applications

Technical Report · Sun Sep 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/6199198· OSTI ID:6199198

Flinn, J E

The response of iron-base alloys to rapid solidification is reviewed with an emphasis on the effects of processing on the microstructure and mechanical property behavior. The processing topics addressed are powder atomization, powder consolidation, joining, and thermal-mechanical exposure. The value of rapid solidification processing (RSP) lies in the ability to promote compositional homogeneity and retention of fine and stable (to high temperatures) microstructures. Achieving the maximum benefit from RSP requires proper application of the basic principles of composition control and rapid crystallization. This investigation has disclosed two very important facets of the RSP approach that can be applied using current technologies. Dissociated oxygen appears to play a significant role in stabilizing microstructural features. In conjunction with oxygen, vacancies trapped during crystallization provide a very stable matrix dispersion for enhanced strengthening. With a fundamental understanding of the response of iron-base alloys to RSP, alloys can be designed that will have substantially better properties and performance than their conventionally processed counterparts. 77 refs., 94 figs., 14 tabs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE; DOI; USDOE, Washington, DC (United States); Department of the Interior, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6199198
• Report Number(s): EGG-MS-9617; ON: DE92003306
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
SOLIDIFICATION
ATOMIZATION
CHROMIUM ALLOYS
GRAIN SIZE
NICKEL ALLOYS
NIOBIUM ALLOYS
PARTICLE SIZE
POWDER METALLURGY
POWDERS
STAINLESS STEEL-304
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
WELDING
ALLOYS
AUSTENITIC STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
JOINING
MATERIALS
METALLURGY
MICROSCOPY
PHASE TRANSFORMATIONS
SIZE
STAINLESS STEELS
STEEL-CR19NI10
STEELS
360101* - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties