Optimization of Fe/Cr/C base structural steels for improved strength and toughness
Creators
- 1. Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720
Description
Optimization of the composition and the heat treatments to provide a microduplex structure of dislocated-autotempered lath martensite and thin film retained austenite for good combinations of mechanical properties has been attained for Fe/Cr/C base steels. Substituting 0.5 wt pct Mo to reduce Cr from 4 pct to 3 pct did not affect the microstructures nor the properties. It was found that ai melting as compared to vacuum melting does not cause deterioration of toughness in Mn containing alloys but does so in Ni containing alloys. Tempered martensite embrittlement was confirmed as being due to the decomposition of retained austenite. Further improvements in the fracture toughness are achieved b double heat treatments which provide grain refinement. These alloys are considered to be very promising for structural applications
Additional details
Publishing Information
- Journal Title
- Metall. Trans., A
- Journal Volume
- 13A
- Series
- Metall. Trans., A.
- Journal Page Range
- 2227-2238
- ISSN
- 0360-2133
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 15008835
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AUSTENITE; CARBON STEELS; CHROMIUM STEELS; DECOMPOSITION; EMBRITTLEMENT; FRACTURE PROPERTIES; HEAT TREATMENTS; IRON BASE ALLOYS; MANGANESE; MARTENSITE; MECHANICAL PROPERTIES; MELTING; MICROSTRUCTURE; MOLYBDENUM; NICKEL ALLOYS; OPTIMIZATION; TEMPERING; THIN FILMS; USES
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CRYSTAL STRUCTURE; ELEMENTS; FILMS; HIGH ALLOY STEELS; IRON ALLOYS; METALS; PHASE TRANSFORMATIONS; STAINLESS STEELS; STEELS; TRANSITION ELEMENTS