Effect of ferrite content on stress corrosion cracking in duplex stainless steel weld metals at room temperature
Constant extension rate tests have been conducted on Type 304 stainless steel base metal specimens and on stainless steel weld metal specimens with ferrite contents of Ferrite Number 1, 3, 6, 11, 16, and 24, at room temperature in deaerated, 1N HCI. Stress corrosion cracking in wholly austenitic Type 304 base metal occurs transgranularly, while cracking in duplex weld metal occurs either by the combined action of stress assisted ferrite dissolution and stress corrosion cracking (SCC) in the austenite or entirely by stress assisted dissolution of the ferrite. Ferrite content and distribution are important in determining both the stress corrosion susceptibility and crack morphology of duplex weld metals. The most susceptible duplex weld metals are those which exhibit a continuous or nearly continuous vermicular ferrite structure.
- Research Organization:
- Rensselaer Polytechnic Inst., Troy, NY
- OSTI ID:
- 6465052
- Journal Information:
- Corrosion; (United States), Journal Name: Corrosion; (United States) Vol. 35:2; ISSN CORRA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ARC WELDING
AUSTENITE
CARBON ADDITIONS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
CRACKS
CRYSTAL STRUCTURE
DUCTILITY
FABRICATION
FERRITE
FILLER METALS
GAS METAL-ARC WELDING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
MICROSTRUCTURE
NICKEL ALLOYS
STAINLESS STEEL-304
STAINLESS STEEL-304L
STAINLESS STEEL-310
STAINLESS STEELS
STEELS
STRAIN RATE
STRESS CORROSION
STRESSES
TENSILE PROPERTIES
WELDED JOINTS
WELDING