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Author : J. W. Anderson
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (91 download)
Download or read book Studies on the Alpha-to-beta and Beta-to-alpha Phase Transformations of Plutonium written by J. W. Anderson and published by . This book was released on 1964 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. D. Nelson
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Beta-alpha and Alpha-beta Transformations in Plutonium Under Applied Stresses written by R. D. Nelson and published by . This book was released on 1965 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. D. Nelson
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.3/5 (91 download)
Download or read book Transformation Kinetics of Plutonium written by R. D. Nelson and published by . This book was released on 1961 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transformation Kinetics of Plutonium. Part I. a Study of the Beta to Alpha and Alpha to Beta Transformations written by and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The transformation kinetics of alpha and beta plutoniunn were determined by using a fluid displacement technique. The rate of formation of the alpha phase from the beta phase was determined after beta heat treating and allowing the sample to transform isothermally in the alpha range. Isothermal reaction curves were obtained from --78 to +90 d C.A time- temperaturetransformation curve showed the maximum rate of transformation to be approximately --20 d C. The beta phase did not transform completely to the alpha when the transformation was allowed to take place isothermally. A relationship between the fraction untransformed beta and the transformation temperature has been established. Isothermal reaction curves and a time- temperature-transformation curve of the alpha at 200 deg C an - BETA transformation were obtained. Portions of the timetransformation curves of the BETA at 200 deg C an alpha transformation of four purities were plotted. The effects of beta heat treating times and temperatures were studied. Photomicrographs of a specimen having transformed from the beta to the alpha phase at different rates of transformation are presented. (auth).
Author : Brent J. Beer
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.:/5 (424 download)
Download or read book Investigation of the Stresses Induced During the Beta-to-alpha Phase Transformation in Unalloyed Plutonium written by Brent J. Beer and published by . This book was released on 1969 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transformation Kinetics of Plutonium. Part II. a Study of the Gamma to Beta to Alpha and Alpha to Beta to Gamma Transformations written by and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The kinetics of the gamma deg C was con- beta deg C was con- alpha, beta deg C was con- gamma, and alpha deg C was con- beta deg C was con- gamma transformations were determined with a fiuid displacement technique. The rates of formation of the alpha and beta phases from the gamma phase were determined after gamma heat treating and allowing a sample to traasform isothermally in the alpha and beta ramges. Isothermal reaction curves were obtained from 160 C to -78C. The time-temperature-transformation curve of the gamma deg C was con- beta deg C was con- alpha transformation was plotted. The effect of the gamma heat treating time and temperature on the rate of transformation was examined. Isothermal reaction curves and time-temperature- transformation curves of the beta deg C was con- gamma, and alpha deg C was con- beta deg C was con- gamma transformations were plotted. Photomicrographs of specimens having transformed from the gamma range at different rates of transformation are presented. (auth).
Author :
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (953 download)
Download or read book Supplement to "Studies on the Equilibrium Temperature for the Plutonium Alpha-Beta Transformation." written by and published by . This book was released on 1965 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cited paper presents data which establishes the equilibrium temperature for the alpha-beta transformation of Pu at 117.0 ±0.5°C. This was observed by following the electrical resistance change in thin, high purity, mixed-phase specimens as they were thermally cycled near the transformation temperature. As expected the time required for small phase changes near the equilibrium temperature was long. Data regarding the mechanisms of the alpha-beta and beta-alpha transformations or rates as a function of temperature were not presented.
Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (929 download)
Download or read book Kinetics of the Beta-alpha Transformation in Pure Plutonium written by and published by . This book was released on 1965 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Kinetics of the Beta to Alpha Transformation in Unalloyed Plutonium Using Differential Scanning Calorimetry written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Differential scanning calorimetry measurements, both isothermal and on cooling, were made during the [beta] [yields] [alpha] transformation of unalloyed plutonium. The calorimetric measurements, because they directly measure the rate of heat flow, provide a direct quantitative measure of the rate of the reaction. Isothermal measurements at temperatures from 56[degree] to 68[degree]C showed that the reaction required incubation times, presumably for nucleation of the alpha phase, of from 300 to 550 seconds. The reaction rate increased with decreasing temperature in agreement with results of prior studies. The measured value for the heat of the reaction also corroborated earlier findings. The fraction-transformed curves were analyzed using the Johnson, Mehl, Avrami model. Analysis showed clearly that the reaction kinetics do not fit this model. The Avrami exponent, instead of being constant as predicted, decreased continuously (by more than a factor of four) during the first 80% of the reaction. Possible reasons for this apparent deviation from classical transformation kinetics are discussed. Measurements in the temperature-scanning mode were made on a sample consisting of ten separate pieces of plutonium. With successive cooling cycles through the [beta] [yields] [alpha] transformation, the heat release peak changed in shape, width, and position. This effect is believed to be due to changes in the residual stresses in different pieces of the sample.
Author : R. D. Nelson
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (91 download)
Download or read book Preliminary Investigation of the Transformation Rates of Plutonium-uranium Alloys written by R. D. Nelson and published by . This book was released on 1960 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.3/5 (91 download)
Download or read book Plutonium Abstracts written by and published by . This book was released on 1964 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alan F. Berndt
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book Attempted Preparation of Single Crystals of ALPHA Plutonium written by Alan F. Berndt and published by . This book was released on 1964 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The indexing of powder patterns and the determination of a unit cell of alpha plutonium were proved by an x-ray study of a small single crystal of a plutonium-neptunium alloy having the alpha-plutonium structure.
Author :
Publisher :
ISBN 13 :
Total Pages : 964 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (929 download)
Download or read book Kinetics of the Alpha Beta Transformation of Plutonium Near the Equilibrium Temperature written by and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metastability of Alpha Plutonium written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The metastability of alpha plutonium above the [alpha] [r-equilibrium] [beta] equilibrim transformation temperature (112 C) was studied by metallographic techniques. The purpose of this study was to extend the previous work on the [alpha] [yields] [beta] transformation which was accomplished using fluid displacement techniques[sup 1] and to obtain a basis for determining the length of time the alpha phase is stable at high temperatures. Approximate isothermal reaction curves were determined experimentally and an [alpha] [yields] [beta] time- temperature-transformation (T-T-T) curve was derived.
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Author : J.D. Hill
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (899 download)
Download or read book The Thermodynamic Equilibrium Temperatures of the [alpha]-[beta] and [beta]-[gamma] Transformations in Plutonium written by J.D. Hill and published by . This book was released on 1960 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. Robert Ralston
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.3/5 (91 download)
Download or read book Critical Parameters of Spherical Systems of Alpha-phase Plutonium Reflected by Beryllium written by H. Robert Ralston and published by . This book was released on 1958 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
