Reduced-activation austenitic stainless steels: The Fe--Mn--Cr--C system
Nickel-free manganese-stabilized steels are being developed for fusion-reactor applications. As the first part of this effort, the austenite-stable region in the Fe--Mn--Cr--C system was determined. Results indicated that the Schaeffler diagram developed for Fe--Ni--Cr--C alloys cannot be used to predict the constituents expected for high-manganese steels. This is true because manganese is not as strong an austenite stabilizer relative to delta-ferrite formation as predicted by the diagram, but it is a stronger austenite stabilizer relative to martensite than predicted. Therefore, the austenite-stable region for Ne--Mn--Cr--C alloys occurs at lower chromium and hugher combinations of manganese and carbon than predicted by the Schaeffler diagram. Development of a manganese-stabilized stainless steel should be possible in the composition range of 20 to 25% Mn, 10 to 15% Cr, and 0.01 to 0.25%C. Tensile behavior of an Fe--20%Mn--12%Cr--0.25%C alloy was determined. The strength and ductility of this possible base composition was comparable to type 316 stainless steel in both the solution-annealed and cold-worked condition.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7170951
- Report Number(s):
- CONF-880613-2; ON: DE88008091
- Resource Relation:
- Conference: 14. international symposium on effects of radiation on materials, Andover, MA, USA, 27 Jun 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
AUSTENITIC STEELS
TENSILE PROPERTIES
CARBON
CHROMIUM ALLOYS
DUCTILITY
IRON ALLOYS
MANGANESE ALLOYS
MARTENSITE
THERMONUCLEAR REACTOR MATERIALS
ALLOYS
CARBON ADDITIONS
ELEMENTS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NONMETALS
STEELS
700209* - Fusion Power Plant Technology- Component Development & Materials Testing
360103 - Metals & Alloys- Mechanical Properties