Reactivity of Titanium with Gaseous N2O4 Under Conditions of Tensile Rupture PDF Download
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Author: J. D. Jackson
Publisher:
ISBN:
Category : Nitrogen tetroxide
Languages : en
Pages : 12
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Book Description
Author: J. D. Jackson
Publisher:
ISBN:
Category : Nitrogen tetroxide
Languages : en
Pages : 12
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Book Description
Author:
Publisher:
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Category : Aeronautics
Languages : en
Pages : 1278
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Author: R. H. Ernst
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Category : Titanium
Languages : en
Pages : 12
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Book Description
A brief study of delayed fracture in a seam-welded titanium panel is summarized in this memorandum. Examination of the fracture surface with electron microscopy showed that the material cleaved, failing in a brittle manner. Although the nature of the embrittlement was not clearly defined, titanium hydride phase was suspected as a prime contributor to failure. Even though the hydrogen content of the titanium was only 65 ppm, hydride embrittlement was thought to have occurred from precipitation of hydride platelets on crystal planes oriented normal to welding stresses. Other work, briefly discussed in the memorandum, has confirmed that hydride platelets in titanium can be oriented by stress and that tensile ductility of Zircaloy (which behaves similarly with respect to hydrogen, to titanium) depends upon hydride orientation. Stress-relief annealing of welded titanium structures is recommended wherever possible to minimize embrittlement by stress-oriented hydrides. (Author).
Author:
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Category : Rockets (Aeronautics)
Languages : en
Pages : 76
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Author: W. R. Warke
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Category : Fractography
Languages : en
Pages : 28
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Author: F. C. Holden
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Category : Stability
Languages : en
Pages : 48
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Author: L. R. Jackson
Publisher:
ISBN:
Category : Plates (Engineering)
Languages : en
Pages : 50
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Book Description
This memorandum supplements and augments information presented in DMIC Memorandum 178 (AD-422 463). In the present report, Neuber's stress equations are rewritten entirely in rectangular coordinates. In addition, numerical results have been extended to include the stress distribution around an indefinitely sharp crack. It is also shown that the stress function used in a British work for an indefinitely sharp crack yielded identical numerical results, even though the stress function was of a different type than that employed by Neuber. The Von Mises relation was chosen to delineate the area around a crack in which plastic flow is occurring. The numerical tables in this memorandum give values for the function of plane stress as well as one possible interpretation of plane strain. Values of the hydrostatic stress variant are also given for both plane stress and plane strain. (Author).
Author: D. J. Maykuth
Publisher:
ISBN:
Category : Powder metallurgy
Languages : en
Pages : 18
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Author: W. R. Warke
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 14
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Author: L. R. Jackson
Publisher:
ISBN:
Category : Plates (Engineering)
Languages : en
Pages : 38
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Book Description
The primary purpose of this memorandum was to make the results of Neuber's stress analysis more readily usable by those engaged in evaluating the crack sensitivity of materials. While the more intense effect of a crack dies out rapidly near the crack tip, a measurable effect does persist over a great enough area that strain gages could be used to determine the extent to which Neuber's analysis can be applied to granular materials like metals and alloys. The results indicate that, except in the immediate vicinity of the crack tip, the stress field is quite insensitive to crack geometry. (Author).
