Structure and elevated temperature properties of Type 308 stainless steel weld metal with varying ferrite contents. [649/sup 0/C]

Journal Article · Thu Jun 01 00:00:00 EDT 1978 · Weld. J. (Miami); (United States)

OSTI ID:6377483

Berggren, R G ^[1]; Cole, N C; Goodwin, G M; Stiegler, J O; Slaughter, G M; Gray, R J; King, R T

---

1. Oak Ridge National Lab., TN

The as-deposited microstructure, creep and tensile properties at 649 C (1200 F), and fracture behavior of shielded metal-arc Type 308 stainless steel welds having nominal ferrite contents from 0 to 15% were investigated. The ferrite phase morphology varied from isolated patches in nominally 0% ferrite welds to a nearly continuous phase in nominally 15% ferrite welds in metallographic studies. Low ductility creep failures occurred when extensive interphase cracking occurred at austenite--sigma phase boundaries (i.e., for welds with high initial ferrite content tested under low stress). The fraction of creep test time before third-stage creep was usually less than 0.3 for specimens that exhibited high ductility.

• OSTI ID: 6377483
• Journal Information: Weld. J. (Miami); (United States), Vol. 57:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
22 GENERAL STUDIES OF NUCLEAR REACTORS
PRESSURE VESSELS
WELDED JOINTS
STAINLESS STEEL-308
CREEP
MICROSTRUCTURE
TENSILE PROPERTIES
AUSTENITE
CHEMICAL COMPOSITION
CONTAINMENT
CRACKS
CRYSTAL-PHASE TRANSFORMATIONS
DUCTILITY
ELONGATION
FERRITE
FILLER METALS
FRACTURES
HIGH TEMPERATURE
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
SURFACES
YIELD STRENGTH
ALLOYS
CARBON ADDITIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CONTAINERS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
FAILURES
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
STAINLESS STEELS
STEELS
360104* - Metals & Alloys- Physical Properties
360102 - Metals & Alloys- Structure & Phase Studies
220200 - Nuclear Reactor Technology- Components & Accessories