Effect of austenitizing temperature upon the microstructure and mechanical properties of experimental Fe/Cr/C steels

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02811983· OSTI ID:6054580

Carlson, M F ^[1]; Narasimha Rao, B V; Thomas, G

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1. Boeing Commercial Airplane Co., Seattle, WA

The present study investigates the as-quenched mechanical properties viz, strength, ductility and sharp notch (K/sub Ic/) as well as blunt notch (Charpy) toughness, of simple Fe/Cr/C alloys with and without titanium as a function of austenitizing temperature. For the ternary Fe/Cr/C alloys the results are consistent with earlier investigations, but the fracture toughness does not change with increasing austenitizing temperatures after 0.2 wt pct Ti is added. The titanium forms carbides (TiC) that did not dissolve, providing a roughly constant number of crack nucleation sites, and preventing austenite grain growth up to 1100/sup 0/C. The differences in mechanical behavior, particularly the rounded notch toughness, are discussed and explained in terms of the microstructural characteristics of the alloys, as determined by detailed electron microscopy analysis.

• OSTI ID: 6054580
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10A:9; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AUSTENITE
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CHARPY TEST
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CHROMIUM STEELS
CRYSTAL STRUCTURE
DUCTILITY
GRAIN SIZE
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
SIZE
STEELS
TEMPERATURE DEPENDENCE
TEMPERING
TENSILE PROPERTIES
TITANIUM ADDITIONS
TITANIUM ALLOYS