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

Journal Article · Wed Dec 01 04:00:00 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), Journal Name: Metall. Trans., A; (United States) Vol. 13; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

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