The Effect of Specimen Size on the Fatigue Crack Strength of Cylindrical Specimens of Heattreated 4340 Steel PDF Download
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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: 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: 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: United States. Superintendent of Documents Publisher: ISBN: Category : Government publications Languages : en Pages : 1496
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Author: E. P. Klier
Author: E. P. Klier
Author: E. P. Klier
Author: Naval Research Laboratory (U.S.)
Author: James I. Fisher
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Author: 
Author: 
Author: United States. Superintendent of Documents
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Author: Defense Documentation Center (U.S.)