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EFFECTS OF NATURAL SEAWATER AND CATHODIC POLARIZATION OF HIGH CYCLE FATIGUE OF 5086-H34 ALUMINUM
- Date Issued:
- 1977
- Summary:
- High cycle fatigue tests were conducted using symmetrical center cracked plate specimens in air, sea water and constant potentials of -1.0V and -1.3V(SCE) at 20 Hz. (1200 cycles per minute) to determine what effect these environments had on crack growth rates, delta a/delta n (inches per cycle), of 5086-H34 aluminum when plotted against stress intensity range, delta K (Ksi root of in). Crack growth rates of 10^-8 inches per cycle were obtained which indicated that apparent threshold stress intensities, delta K th, exist which are the same for air, sea water and a constant potential of -1.0V(SCE); however, under a constant potential of -1.3V(SCE) the threshold shifts to a significantly higher value. It was also observed that the different enviroments had a pronounced effect on crack growth rate only at low stress intensities. Several mechanisms are considered to explain this behavior.
Title: | EFFECTS OF NATURAL SEAWATER AND CATHODIC POLARIZATION OF HIGH CYCLE FATIGUE OF 5086-H34 ALUMINUM. |
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Name(s): |
FLODDER, STEVEN PAUL. Florida Atlantic University, Degree grantor Hartt, William H., Thesis advisor |
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Type of Resource: | text | |
Genre: | Electronic Thesis Or Dissertation | |
Issuance: | monographic | |
Date Issued: | 1977 | |
Publisher: | Florida Atlantic University | |
Place of Publication: | Boca Raton, Fla. | |
Physical Form: | application/pdf | |
Extent: | 38 p. | |
Language(s): | English | |
Summary: | High cycle fatigue tests were conducted using symmetrical center cracked plate specimens in air, sea water and constant potentials of -1.0V and -1.3V(SCE) at 20 Hz. (1200 cycles per minute) to determine what effect these environments had on crack growth rates, delta a/delta n (inches per cycle), of 5086-H34 aluminum when plotted against stress intensity range, delta K (Ksi root of in). Crack growth rates of 10^-8 inches per cycle were obtained which indicated that apparent threshold stress intensities, delta K th, exist which are the same for air, sea water and a constant potential of -1.0V(SCE); however, under a constant potential of -1.3V(SCE) the threshold shifts to a significantly higher value. It was also observed that the different enviroments had a pronounced effect on crack growth rate only at low stress intensities. Several mechanisms are considered to explain this behavior. | |
Identifier: | 13859 (digitool), FADT13859 (IID), fau:10687 (fedora) | |
Collection: | FAU Electronic Theses and Dissertations Collection | |
Note(s): |
College of Engineering and Computer Science Thesis (M.S.E.)--Florida Atlantic University, 1977. |
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Subject(s): |
Aluminum--Testing Aluminum--Fatigue |
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Held by: | Florida Atlantic University Libraries | |
Persistent Link to This Record: | http://purl.flvc.org/fcla/dt/13859 | |
Sublocation: | Digital Library | |
Use and Reproduction: | Copyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder. | |
Use and Reproduction: | http://rightsstatements.org/vocab/InC/1.0/ | |
Host Institution: | FAU | |
Is Part of Series: | Florida Atlantic University Digital Library Collections. |