Effect of strain rate on stress corrosion cracking in duplex Type 304 stainless steel weld metal
The influence of strain-rate on the stress-corrosion cracking properties of wholly austenitic Type 304 base metal and duplex austeno-ferritic Type 304 weld metal in boiling MgCl/sub 2/ was investigated using constant extension rate tensile testing techniques. Transgranular SCC in both base and weld metals is preferred at low strain-rates, while intergranular cracking in the base metal and interphase cracking along the austenite-ferrite interface in the weld metal are preferred at higher strain-rates. Promotion of the intergranular stress-corrosion cracking in the base metal and interphase-interface stress-corrosion cracking in the weld metal with increases in strain-rate may be mechanistically analogous. Stress-induced alterations in the grain or interphase boundary defect structure may make these regions preferentially susceptible to dissolution.
- Research Organization:
- Air Force Materials Lab., Wright Patterson AFB, OH
- OSTI ID:
- 5713834
- Journal Information:
- Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10:10; ISSN MTTAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AUSTENITE
BOILING
CARBON ADDITIONS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
CRACKS
CRYSTAL STRUCTURE
FABRICATION
FERRITE
FILLER METALS
FRACTURE PROPERTIES
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INTERFACES
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MAGNESIUM CHLORIDES
MAGNESIUM COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
PHASE TRANSFORMATIONS
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRAIN RATE
STRESS CORROSION
SURFACES
WELDED JOINTS