Brittle fracture in high-strengthening single crystals of austenitic stainless steels

Book · Wed Dec 31 04:00:00 EST 1997

OSTI ID:293133

Chumlyakov, Yu I; Kireeva, I V; Litvinova, E I; Kirillov, V I; Surikova, N S ^[1]

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1. Siberian Physico-Technical Inst., Tomsk (Russian Federation)

Single crystals of austenitic stainless steels with a stacking fault energy {gamma}{sub sf} = 0.02--0.2 J/m{sup 2}, fcc heterophase Cu-Al-Co, bcc heterophase Fe-Cr-Co-Mo and titanium nickel crystals were investigated in order to find out the deformation and fracture dependence on crystal orientation, test temperature, nitrogen content, size and volume fraction of second phase particles. It was shown that the plastic deformation mechanism (slip and twinning) and strength level play the main role in the formation conditions of the brittle fracture. In the high-strengthening fcc single crystals the ductile-to-brittle transition (DBT) was found. DBT is caused by the combination of the twinning deformation with the high strength level. It was made the generalization of obtained results for the case of bcc crystals and titanium nickel B-2-intermetallides.

• OSTI ID: 293133
• Report Number(s): CONF-970980--; ISBN 0-87339-381-3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRITTLENESS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
DUCTILE-BRITTLE TRANSITIONS
EXPERIMENTAL DATA
FRACTURE PROPERTIES
PHASE STUDIES
SLIP
TWINNING