Creep properties of Inconel-617 in air and helium at 800 to 1000/sup 0/C

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Nucl. Technol.; (United States)

OSTI ID:6325397

Cook, R H

Creep and structural data are presented on three casts of Inconel alloy 617 tested in air and controlled impurity helium for times up to 42 000 h in a test facility at CIIR, Oslo. Prior cold work reduced initial creep rate at 850/sup 0/C, but it also reduced the room-temperature tensile ductility measured after samples had been subjected to small creep strains. The main effect of environment was that air promoted high rupture ductilities, relative to the helium atmosphere used in this work. It was found that air testing caused nucleation and growth of many oxide-filled cracks. Carburization occurred during the helium tests, but this had little influence on rupture life (relative to air tests) under the experimental conditions used here. Structural examination showed that creep conditions favored the precipitation of carbides on grain boundaries transverse to the imposed tensile stress.

• Research Organization: High Temperature Materials Programme c/o Robert Michaels Detection Ltd., Unit 11, Wessex Trade Centre Ringwood Road Poole, Dorset, England BH12 3PF
• OSTI ID: 6325397
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 66:2; ISSN NUTYB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
AIR
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
CARBURIZATION
CHROMIUM ALLOYS
COBALT ALLOYS
CORROSIVE EFFECTS
CRACK PROPAGATION
CREEP
CRYSTAL STRUCTURE
DESTRUCTIVE TESTING
ELEMENTS
FAILURES
FLUIDS
FRACTURE PROPERTIES
GASES
GRAIN BOUNDARIES
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HELIUM
INCONEL 617
INCONEL ALLOYS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONMETALS
NUCLEATION
PRECIPITATION
RARE GASES
REACTOR MATERIALS
RUPTURES
SEPARATION PROCESSES
SURFACE HARDENING
SURFACE TREATMENTS
TESTING
VERY HIGH TEMPERATURE