Effect of residual elements on fracture characteristics and creep ductility of type 308 stainless steel weld metal

Journal Article · Tue Jul 01 00:00:00 EDT 1975 · J. Eng. Mater. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3443291· OSTI ID:7320140

Stiegler, J O; King, R T; Goodwin, G M

Previous studies had shown that conventional type 308 stainless steel weld metal can have low creep ductility (<1 percent total elongation) at 650 deg C. This paper demonstrates that the low ductility results from internal cracks that develop at austenite-sigma phase boundaries and propagate under the test conditions. The sigma phase is formed from ferrite present in the as-deposited weld metal. The 308 stainless steel weld metal containing controlled amounts of the residual elements B, P, and Ti also contains sigma phase, but phase boundary cracking has not been observed even after 5000 hr. The controlled residual element weld metal is significantly more ductile (>10 percent total elongation) than the conventional weld metals for which data are available.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 7320140
• Journal Information: J. Eng. Mater. Technol.; (United States), Journal Name: J. Eng. Mater. Technol.; (United States); ISSN JEMTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals &amp; Alloys-- Mechanical Properties
ALLOYS
AUSTENITE
CARBON ADDITIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
DUCTILITY
FILLER METALS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NICKEL ALLOYS
PHASE TRANSFORMATIONS
STAINLESS STEEL-308
STAINLESS STEELS
STEELS
TENSILE PROPERTIES