ULTRASONIC CHARACTERIZATION AND COMPUTERIZED ANALYSIS OF GRAPHITE BILLETS. PDF Download
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Languages : en
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Languages : en
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Category : Nuclear energy
Languages : en
Pages : 860
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Category : Aeronautics
Languages : en
Pages : 1278
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Category : Nondestructive testing
Languages : en
Pages : 334
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Author: Instituto de Energia Atômica (Brazil). Biblioteca
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Category : Nuclear energy
Languages : en
Pages : 650
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Languages : en
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Near-conventional pulse-echo flaw detection techniques can be successfully applied to graphite material. If the specimen configuration (i.e., length-to-diameter ratio) is conducive to the choice of ultrasonic test parameters dictated by the material screening tests, then only the test sensitivity needs to be established. Conventional test block approaches to calibration work well; however, uniform homogeneity of the specimens to be tested must be assumed (depending on the graphite, this may be an invalid assumption). Sensitivities that we have demonstrated typically detect 0.5- to 0.75-mm (0.020 to 0.030-in.) reflectors at depths up to 102 mm (4 in.) for GRAPHNOL (drilled holes, not flat bottom). Other materials may dictate inspection for much larger discontinuities. The least sensitive tests performed to date (using the storage oscilloscope approach) required flat-bottom holes of 6.35 mm (0.250 in.) in diameter for calibration. This relatively insensitive test was necessary because of the billet length and material characteristics.
Author: R. C. Stinebring
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Category : Ceramic materials
Languages : en
Pages : 132
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The objective of the program was to utilize the nondestructive testing information, correlations, and techniques, developed during the previous year, for characterizing and evaluating zirconium and hafnium diboride systems and aerospace graphite materials.
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Category : Automatic control
Languages : en
Pages : 250
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Proceedings of the ISA Conference and Exhibit.
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Category : Research
Languages : en
Pages : 1002
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Category : Government publications
Languages : en
Pages : 1120
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