Fracture of Fe--Cr--Mn austenitic steel
Tensile tests of Tenelon (U.S. Steel), a nitrogen-strengthened iron-base alloy containing 18% chromium and 15% manganese, demonsterated that cleavage fracture can occur in some austenitic steels and is promoted by the presence of hydrogen. Tensile failure of Tenelon at 78/sup 0/K occurred with no detectable necking at low strain levels. The fracture surface contained cleavage facets that lay along coherent twin boundaries oriented transversely to the tensile axis. Charging gaseous hydrogen at 679 MPa pressure and 650/sup 0/K had no significant effect on the mechanical behavior or fracture mode at 78/sup 0/K, but raised the ductile-to-brittle transition temperature from less than 200/sup 0/K to about 250/sup 0/K.
- Research Organization:
- Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
- DOE Contract Number:
- EY-76-C-09-0001
- OSTI ID:
- 6403087
- Report Number(s):
- DP-MS-78-68; CONF-790219-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRACKS
CRYOGENIC FLUIDS
DUCTILE-BRITTLE TRANSITIONS
ELEMENTS
FAILURES
FLUIDS
FRACTURES
HIGH TEMPERATURE
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
METALLURGICAL EFFECTS
NONMETALS
PHYSICAL PROPERTIES
STAINLESS STEELS
STEELS
TENELON
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE