Hot-cracking mechanism in CO/sub 2/ laser beam welds of dissimilar metals involving PH martensitic stainless steels
Journal Article
·
· Weld. J. (Miami); (United States)
OSTI ID:5532194
Autogenous CO/sub 2/ laser beam welds were made between Alloy HP 9-4-20 and both 15-5 PH and PH 13-8 Mo stainless steel. Small scale circular-patch test specimens revealed that the combination involving the Nb-bearing alloy, 15-5 PH, was far more crack susceptible than the combination involving the Nb-free alloy, PH 13-8 Mo. Analytical electron microscopy was used to identify an NbC/austenite eutectic-like constituent as being responsible for the cracking phenomenon.
- Research Organization:
- Process Metallurgy Div., Sandia National Labs., Albuquerque, NM
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5532194
- Journal Information:
- Weld. J. (Miami); (United States), Journal Name: Weld. J. (Miami); (United States) Vol. 66:2; ISSN WEJUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CARBON DIOXIDE LASERS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRACKS
ELECTRON MICROSCOPY
FABRICATION
FRACTURE MECHANICS
GAS LASERS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
LASER WELDING
LASERS
MARTENSITE
MECHANICS
MICROSCOPY
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
NIOBIUM CARBIDES
NIOBIUM COMPOUNDS
REFRACTORY METAL COMPOUNDS
STAINLESS STEELS
STEELS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
WELDED JOINTS
WELDING
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CARBON DIOXIDE LASERS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRACKS
ELECTRON MICROSCOPY
FABRICATION
FRACTURE MECHANICS
GAS LASERS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
LASER WELDING
LASERS
MARTENSITE
MECHANICS
MICROSCOPY
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
NIOBIUM CARBIDES
NIOBIUM COMPOUNDS
REFRACTORY METAL COMPOUNDS
STAINLESS STEELS
STEELS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
WELDED JOINTS
WELDING