Fatigue-crack growth in Inconel 718 weldments at elevated temperatures
Journal Article
·
· Weld. J. Res. Suppl.; (United States)
OSTI ID:6406528
The techniques of linear-elastic fracture mechanics were used to characterize the fatigue-crack growth behavior of Inconel 718 gas tungsten arc (GTA) weldments over the temperature range 24 to 649 C (75 to 1200 F). Two different postweld heat treatments were employed: the conventional (ASTM A637) treatment, and a modified heat treatment designed to eliminate the brittle Laves phase that forms during the welding process. Weldment specimens given the modified postweld heat treatment consistently exhibited superior fatigue-crack growth behavior relative to conventionally-treated weldments. In addition, weldment specimens treated by either process exhibited higher crack growth rates than plate specimens similarly heat treated.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA
- OSTI ID:
- 6406528
- Journal Information:
- Weld. J. Res. Suppl.; (United States), Journal Name: Weld. J. Res. Suppl.; (United States); ISSN WERSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CORROSION RESISTANCE
CRACKS
FRACTURE PROPERTIES
HEAT TREATMENTS
INCONEL 718
INCONEL ALLOYS
JOINTS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
REACTOR COMPONENTS
REACTOR MATERIALS
TEMPERATURE DEPENDENCE
WELDED JOINTS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CORROSION RESISTANCE
CRACKS
FRACTURE PROPERTIES
HEAT TREATMENTS
INCONEL 718
INCONEL ALLOYS
JOINTS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
REACTOR COMPONENTS
REACTOR MATERIALS
TEMPERATURE DEPENDENCE
WELDED JOINTS