The Effect of a Fatigue Crack on the Notch Strength and Fracture Development in Cylindrical Specimens of Heat-treated 4340 Steel PDF Download
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Author: E. P. Klier Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
It is important to know the effect of a fatigue notch on the notch strength of a steel, which in the present work was a 4340 steel heat-treated to characteristic strength levels. Fatiguecracked specimens for the various heat-treated conditions were tested in static tension at temperatures from 75 to -323 F to establish notch-strength transitions. The notch strengths measured with the fatigue-cracked specimens demonstrate that the notch formed in fatigue is more severe than the sharpest machined notches. The ductile-brittle transition measured with 0.5-inch cylindrical fatigue-cracked specimens occurs at higher temperatures than that for comparable 1.5-inch cylindrical specimens with the sharpest machined notches. The fatigue-notch tension data yield fracture indices of brittle behavior which parallel but which are not equal to the NDT index measured in the droop-weight tests reported by Puzak. (Author).
Author: E. P. Klier Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
It is important to know the effect of a fatigue notch on the notch strength of a steel, which in the present work was a 4340 steel heat-treated to characteristic strength levels. Fatiguecracked specimens for the various heat-treated conditions were tested in static tension at temperatures from 75 to -323 F to establish notch-strength transitions. The notch strengths measured with the fatigue-cracked specimens demonstrate that the notch formed in fatigue is more severe than the sharpest machined notches. The ductile-brittle transition measured with 0.5-inch cylindrical fatigue-cracked specimens occurs at higher temperatures than that for comparable 1.5-inch cylindrical specimens with the sharpest machined notches. The fatigue-notch tension data yield fracture indices of brittle behavior which parallel but which are not equal to the NDT index measured in the droop-weight tests reported by Puzak. (Author).
Author: E. P. Klier Publisher: ISBN: Category : Languages : en Pages : 14
Book Description
The present series of tests for a one-inch-diameter fatigue-notched specimen constitutes an extension of a previous series of tests for a onehalf-inch-diameter specimen. The principal change introduced is the specimen size. This change in specimen size leads to minor variations in the fatigue-notch tensile-strength data, but for certain material conditions and specimen-size ranges the notch strength can be profoundly altered. The ductile-brittle transition indicated is critically dependent on tensile strength. During the present tests load-elongation curves were taken, and these have allowed the examination of the ductile-brittle transition as established by stress, by strain, and by means of energy absorption. The experiments suggest that the stress-strain relations in certain fracture tests correspond to those measured for the notch tensile test. (Author).
Author: J. Y. Mann Publisher: Elsevier ISBN: 1483189511 Category : Reference Languages : en Pages : 513
Book Description
Bibliography on the Fatigue of Materials, Components and Structures, Volume 3 addresses the problems associated with fatigue loadings as evident in branches of engineering and technology. Such debilitating factor also affects the human skeletal system. The book provides several references that show an increasing focus being given to the problem of fatigue in materials, components, and structures. The journals and lists of references used in the book, which discuss the subject of fatigue, are chosen to give an initial identification of citations. These sources are accompanied by computer-based documentation systems. The bibliographical data for each citation are thoroughly reviewed by checking the original bases of publication. The references in the book are arranged chronologically according to its year of publication. Major use has been made of abbreviations for the titles of journals and publications. The book can serve as a valuable tool for doctors, therapists, students, and researchers in the field of medicine.
Author: E. P. Klier
Author: E. P. Klier
Author: E. P. Klier
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Author: Naval Research Laboratory (U.S.)
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Author: 
Author: James I. Fisher
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Author: United States. Superintendent of Documents
Author: J. Y. Mann