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FREQUENCY DEPENDENCE OF SEA WATER CORROSION FATIGUE OF NOTCHED 1018 STEEL

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Date Issued:
1975
Summary:
Experiments were conducted to investigate frequency dependence of sea water corrosion fatigue of notched 1018 steel under constant deflection, reverse bend test conditions. Frequencies of 1850, 1200, and 600 cycles per minute (CPM) were studied. Results indicate that frequency effects are not observed at high stresses, apparently due to the mechanical damage component of the fatigue process dominating over corrosion considerations. At low stresses reduced frequency resulted in decreased cycles to failure. Acidification of the crack tip solution is proposed as possibly responsible for this behavior. For specimens subjected to equal stress levels in the frequency dependent region, greater cathodic protection is required to mitigate corrosion fatigue for 600 CPM specimens (-0.86 volts standard calomel electrode) (V SCE) than for 1850 CPM specimens (-079V SCE).
Title: FREQUENCY DEPENDENCE OF SEA WATER CORROSION FATIGUE OF NOTCHED 1018 STEEL.
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Name(s): HENKE, THOMAS ELMER
Florida Atlantic University, Degree Grantor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Date Issued: 1975
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 58 p.
Language(s): English
Summary: Experiments were conducted to investigate frequency dependence of sea water corrosion fatigue of notched 1018 steel under constant deflection, reverse bend test conditions. Frequencies of 1850, 1200, and 600 cycles per minute (CPM) were studied. Results indicate that frequency effects are not observed at high stresses, apparently due to the mechanical damage component of the fatigue process dominating over corrosion considerations. At low stresses reduced frequency resulted in decreased cycles to failure. Acidification of the crack tip solution is proposed as possibly responsible for this behavior. For specimens subjected to equal stress levels in the frequency dependent region, greater cathodic protection is required to mitigate corrosion fatigue for 600 CPM specimens (-0.86 volts standard calomel electrode) (V SCE) than for 1850 CPM specimens (-079V SCE).
Identifier: 13731 (digitool), FADT13731 (IID), fau:10563 (fedora)
Note(s): Thesis (M.S.E.)--Florida Atlantic University, 1975.
Subject(s): Steel--Corrosion
Seawater
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/13731
Sublocation: Digital Library
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Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.