Optimization of Fe/Cr/C base structural steels for improved strength and toughness

Journal Article · Wed Dec 01 00:00:00 EST 1982 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02648394· OSTI ID:6168676

Sarikaya, M ^[1]; Steinberg, B G; Thomas, G

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1. Lawrence Berkeley Lab., CA

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% Mo to reduce Cr from 4% to 3% did not affect the microstructures nor the properties. It was found that air 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 by double heat treatments which provide grain refinement. These alloys are considered to be very promising for structural applications. 15 figures, 4 tables.

• OSTI ID: 6168676
• Journal Information: Metall. Trans., A; (United States), Vol. 13
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM STEELS
MECHANICAL PROPERTIES
OPTIMIZATION
CHEMICAL COMPOSITION
EXPERIMENTAL DATA
FRACTURE PROPERTIES
HEAT TREATMENTS
MICROSTRUCTURE
TEMPERING
ALLOYS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
NUMERICAL DATA
STEELS
360103* - Metals & Alloys- Mechanical Properties