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Damage mechanisms in bithermal and thermomechanical fatigue of Haynes 188

Conference ·
OSTI ID:7306709
;
Post failure fractographic and metallographic studies were conducted on Haynes 188 specimens fatigued under bithermal and thermomechanical loading conditions between 316 and 760 C. Bithermal fatigue specimens examined included those tested under high strain rate in-phase and out-phase, tensile creep in-phase, and compressive creep out-of-phase loading conditions. Specimens tested under in-phase and out-of-phase thermomechanical fatigue were also examined. The nature of failure mode (transgrandular versus intergranular), the topography of the fracture surface, and the roles of oxidation and metallurgical changes were studied for each type of bithermal and thermomechanical test.
Research Organization:
National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
OSTI ID:
7306709
Report Number(s):
N-92-24985; NASA-TM--105381; E--6768; NAS--1.15:105381; CONF-911048--; CNN: RTOP 553-13-00
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOY-CO36CR22NI22W15FE3
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COBALT ALLOYS
COBALT BASE ALLOYS
COMPRESSION
CORROSION RESISTANT ALLOYS
CREEP
CRYSTAL STRUCTURE
DAMAGE
FABRICATION
FAILURE MODE ANALYSIS
FATIGUE
FRACTOGRAPHY
FRACTURING
HAYNES 188 ALLOY
HAYNES ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
IRON ALLOYS
LANTHANUM ADDITIONS
LANTHANUM ALLOYS
MATERIALS
MATERIALS TESTING
MATERIALS WORKING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALLOGRAPHY
MICROSTRUCTURE
OXIDATION
RARE EARTH
RARE EARTH ALLOYS
STRAIN RATE
STRESSES
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TENSILE PROPERTIES
TESTING
THERMAL FATIGUE
THERMAL STRESSES
THERMODYNAMICS
THERMOMECHANICAL TREATMENTS
TOPOGRAPHY