Download or read book DAMAGE IN MOLYBDENUM ASSOCIATED WITH NEUTRON IRRADIATION AND SUBSEQUENT POST IRRADIATION ANNEALING written by and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Molybdemum containing carbon was studied in an attempt to establish the combined effect of impurity content and neutron irradiation on the properties and structure of specific metals. Molybdenum foils were punched into discs and heat treated in vacuum. They were then slow-cooled and irradiated. After irradiation and subsequent decay of radioactivity to a low level the foils were subjected to x-ray diffraction measurements. Cold-worked foils with less than 10 ppm carbon showed no change in microstructure due to irradiation. Molybdenum foils that were annealed prior to irradiation showed spot defects. In foils containing up to 500 ppm carbon, it was concluded that the small loops present after irradiation are due to the clustering of point defects at interstitial carbon atoms, followed by collapse to form a dislocation loop. The amount of lattice expansion after irradiation was strongly dependent on impurity content. Neutron irradiation was found to reduce the number of active slip systems. (M.C.G.).

Download or read book Radiation Damage and Thermal Annealing of Defects in Molybdenum and Tungsten written by A. N. Ivanov and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation damage to high temperature metal homologues of molybdenum and tungsten as a function of dose and the reactor irradiation temperature is investigated. The studies were conducted with polycrystalline specimens 99.9 percent pure in the case of molybdenum and 99.85 percent in the case of tungsten. Variation if the specific electric resistance was used as a measure of the radiation damage. The saturation effect of the radiation damage and the differences observed between the behavior of molybdenum and tungsten are discussed from the standpoint of the thermal stability of the radiation defects formed in them. The part played by radiation alloying when tungsten is irradiated with large thermal neutron doses is also discussed. A study is made of the thermal annealing of radiation defects in molybdenum and tungsten subjected to various irradiation doses at temperatures above room temperature. The similarity between the three recovery stages in the increase in specific electric resistance, observed during annealing in these metals, and the nature of the defects responsible for the recovery stages are discussed. The variation in fine crystal structure for molybdenum and tungsten during reactor irradiation and subsequent annealing is investigated. (Author).

Download or read book The Nature and Annealing Behavior of Irradiation Damage in Molybdenum written by B. L. Eyre and published by . This book was released on 1965 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural defects are observed using transmission electron microscope techniques in molybdenum after neutron or fission fragment irradiation at about 60 C. There is no detectable change in the observable damage on annealing for 1 hr at temperatures up to 600 C, but at 650 C the defects increase in size and become resolvable as dislocation loops. These loops originate from interstitial atoms and the loop size increases with annealing in the range 650 to 950 C. After annealing at 1200 C a well-developed dislocation network is observed and only a few loops remain. No correlation between recovery of microhardness and the observable damage was apparent. Possible reasons are given for the absence of aggregates of vacant lattice sites.

Download or read book Void Formation During High Temperature Post Irradiation Annealing of Molybdenum Neutron Irradiated at 60 C written by J.H. Evans and published by . This book was released on 1972 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Nature and Thermal Stability of Defects in Neutron Irradiated Mo and Mo 0 5 Ti written by Vinod K. Sikka and published by . This book was released on 1973 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dimensional Stability of Neutron Irradiated Molybdenum written by HI. Jang and published by . This book was released on 1975 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycrystalline molybdenum specimens were irradiated to fast neutron fluences between 1.1 x 1019 neutrons (n)/cm2 and 1.0 x 1022 n/cm2 at a temperature range of 70 to 480°C. The irradiation-induced length changes and subsequent changes during postirradiation annealing were measured using a high vacuum dilatometer. The effects of neutron fluences, at reactor ambient temperature of ~70°C, were to increase the length changes up to the neutron fluence of ~1020 n/cm2 and then level off at the higher fluences. The length change data were compared with the resistivity data and the ratio of resistivity to length changes was calculated as 2.7 x 10-3 ?-cm.

Download or read book Neutron Irradiation Damage in Molybdenum written by D.M. Maher and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiation Effects on the Mechanical Properties and Microstructure of Type 304 Stainless Steel written by J. S. Armijo and published by . This book was released on 1964 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Dose Neutron Irradiation Damage in Molybdenum written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Crystal Perfection and Irradiation Temperature on the Damage Structure and Its Annealing Behaviour in Neutron Irradiated Molybdenum Part II written by B. L. Eyre and published by . This book was released on 1970 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutron Irradiation Damage in Molybdenum written by M.E. Downey and published by . This book was released on 1964 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutron Damage to Metals written by A. L. Bement and published by . This book was released on 1959 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Crystal Perfection and Irradiation Temperature on the Damage Structure and Its Annealing Behaviour in Neutron Irradiated Molybdenum written by B.L. Eyre and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Neutron Irradiation Damage in Molybdenum and TZM written by and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiation Damage and Stage Iii Annealing of Molybdenum written by H. B. AFMAN and published by . This book was released on 1970 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactor Materials written by and published by . This book was released on 1963 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: