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Corrosion Fatigue at High Frequencies and High Hydrostatic Pressures / A. Thiruvengadam

Conference Author
Stress Corrosion Cracking of Metals¿̐ưA State of the Art (1971 : Detroit, Michigan)
Physical Description
1 online resource (16 pages) : illustrations, figures, tables
Additional Creators
Thiruvengadam, A., American Society for Testing and Materials, and ASTM International
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Summary
The high frequency fatigue technique originated independently by Mason and Neppiras was used to study the influence of corrosive environment on the fatigue of SAE 1020 steel. With this technique, uniaxial tensile and compressive stresses are produced at the node of a ¿̐ưtuned¿̐ư test specimen vibrating at its resonant frequency. Tests were conducted at two frequencies, namely 14 000 and 20 000 Hz. At these frequencies the reduction in fatigue strength and fatigue life in corrosive environment was comparable to the value obtained in the more familiar low frequency fatigue tests. The fatigue strength is reduced by 50 percent in 5 h at high frequency, whereas the same reduction in strength requires about 300 h at low frequency. Furthermore, the corrosion fatigue life is reduced two orders of magnitude by the superposition of a hydrostatic pressure of 1000 psig. The high frequency fatigue data in noncorrosive environment support the two distribution interpretation of Swanson; however, the value of the Weibull shape parameter increases considerably in the corrosive environment and tends to become unique. This change in probability distribution of fatigue life is brought about in less than 5 min of exposure to the environment. The mean life is reduced from 2 ¿̐ư 108 cycles to 5 ¿̐ư 106 cycles in such a short exposure time. Internal friction is affected significantly in a relatively short exposure to corrosion fatigue. The frequency at which the maximum damping is produced also changes after exposure to corrosion fatigue, These results emphasize the importance of the microstructural aspects in the mechanism of corrosion fatigue.
Dates of Publication and/or Sequential Designation
Volume 1972, Issue 518 (January 1972)
Subject(s)
Other Subject(s)
ISBN
9780803146198 (e-ISBN)
9780803100961
0803100965
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 37.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1972. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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