Corrosion fatigue of high strength fastener materials in seawater. Final report
Environmental effects can significantly reduce the fatigue life of metals. As such, corrosion fatigue is a major concern in the engineering application of high strength fasteners in marine environments. The corrosion fatigue failure of an AISI 41L40 high strength steel blade-to-hub attachment bolt at the MOD-0A 200 kW wind turbine generator in Oahu, Hawaii prompted the current test program. Tests were undertaken to confirm the dramatic reduction of fatigue strength of AISI 41L40 in marine environments and to obtain similar corrosion fatigue data for candidate replacement materials. AISI 41L40, AISI 4140, PH 13-8Mo stainless steel, alloy 718 and alloy MP-35N were tested in axial fatigue at a frequency of 20 Hz in dry air and natural seawater. The fatigue data were fitted by regression equations to allow determination of fatigue strength for a given number of cycles to failure.
- Research Organization:
- LaQue Center for Corrosion Technology, Inc., Wrightsville Beach, NC (USA)
- DOE Contract Number:
- AI01-76ET20320
- OSTI ID:
- 7123524
- Report Number(s):
- DOE/NASA-0337-1; NASA/CR-174677; ON: DE84012274
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ALLOY-MP35N
CORROSION FATIGUE
INCONEL 718
STAINLESS STEELS
AIR
FASTENERS
SEAWATER
ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
CORROSION RESISTANT ALLOYS
FATIGUE
FLUIDS
GASES
HYDROGEN COMPOUNDS
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
OXYGEN COMPOUNDS
STEELS
WATER
170602* - Wind Energy Engineering- Turbine Design & Operation
360105 - Metals & Alloys- Corrosion & Erosion