Download or read book Effects of Neutron Irradiation on the Microstructure of Niobium and Niobium Base Alloys written by DJ. Michel and published by . This book was released on 1979 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructure and microhardness of niobium and commercial prototype niobium-base alloys have been investigated following fast neutron irradiation to a fluence of 1.1 x 1022 neutrons (n)/cm2 (0.1 MeV), 4 displacements per atom (dpa), at 482°C. The purpose of this work was to determine the effects of molybdenum and zirconium alloy additions on the resistance of niobium-base alloys to neutron irradiation. Neutron irradiation of the niobium and Nb-1Mo alloy produced very small voids whose mean diameters were in the range of 30 to 35 Å. In all other alloys, however, no voids were observed and the principal effect of the neutron irradiation was to form a high density of 30 to 40 Å diameter dislocation loops which are believed to be primarily of interstitial character. The effect of fast neutron irradiation was to increase the microhardness of both niobium and all its alloys, with the largest increase in the Nb-1Zr alloy and the smallest increase in the ternary Nb-5Mo-1Zr alloy. Previous work on niobium and Nb-1Zr alloy has shown that a vacancy trapping mechanism is particularly effective at irradiation temperatures up to 600°C for fast neutron fluences of 2.5 x 1022 n/cm2 (0.1 MeV). The observation from the present experiments that molybdenum and zirconium additions were effective in the suppression of void formation suggests that a vacancy trapping mechanism was operative in the present alloys. The smaller hardness increase observed for the ternary alloys suggests that these alloys may maintain good engineering properties in addition to their improved resistance to void formation.
Download or read book Effects of Neutron Irradiation on the Microstructure and Microhardness of Niobium Base Alloys written by DJ. Michel and published by . This book was released on 1987 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructure and microhardness of several niobium-base binary and ternary alloys were investigated following fast neutron irradiation to a fluence of 18 dpa (4.8 x 1022 n/cm2, >0.1 MeV) at 650°C. Transmission electron microscope (TEM) procedures were employed to observe the microstructure of the alloy specimens following neutron irradiation and in the unirradiated condition. Microhardness measurements were made on irradiated and unirradiated specimens to obtain information on the effects of irradiation on mechanical properties. Neutron irradiation of the Nb-1Mo and Nb-5Mo-1Zr alloys produced voids and a high density of dislocation loops. No voids were observed in the irradiated Nb-1Zr alloy. Microhardness measurements of the irradiated alloys indicated that the effect of the fast neutron irradiation was to increase the microhardness of all the niobium-base alloys. The magnitude of the microhardness increase was found to be a function of the alloy composition, with the smallest increase observed in the Nb-5Mo-1Zr alloy. The observations in this study are in agreement with the previous work, which has shown that molybdenum and zirconium additions were effective in suppressing void formation in niobium-base alloys for irradiation temperatures up to ?1100°C.
Download or read book Program to Study the Effects of Neutron Irradiation Upon Niobium Base Alloys written by and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Radiation on Structural Materials written by James A. Sprague and published by ASTM International. This book was released on 1979 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on the Effects of Neutron Radiation on Structural Materials written by M. Kangilaski and published by . This book was released on 1967 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstructures of Irradiated Materials written by H. S. Rosenbaum and published by Elsevier. This book was released on 2013-10-22 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Treatise on Materials Science and Technology, Volume 7: Microstructures of Irradiated Materials covers the effects of irradiation on the microstructures of solids. The book introduces basic concepts and terminology and discusses the physical effects of irradiation, those having to do with the physical displacement of atoms and the subsequent atom rearrangements that can occur either by momentum transfer or by diffusional phenomena. The text also describes the chemical effects of irradiation, including diffusion, phase changes, precipitation of solute atoms, transmutations, and combinations of these. Some of the complex situations encountered in some nuclear fuels and structural materials of practical concern are also encompassed. Metallurgists, metallurgical engineers, ceramists, materials scientists, and people interested in the nuclear field will find the book invaluable.
Download or read book Effect of neutron irradiation on tensile properties of the zirconium 2 5 weight per cent niobium alloy written by C. E. Ells and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alloy Development for Irradiation Performance written by United States. Department of Energy. Office of Fusion Energy and published by . This book was released on 1978 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Neutron Irradiation in Non fissionable Metals and Alloys written by International Atomic Energy Agency and published by . This book was released on 1962 with total page 232 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 1976 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation induced Changes in Microstructure written by F. A. Garner and published by ASTM International. This book was released on 1987 with total page 919 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of NRL Progress written by Naval Research Laboratory (U.S.) and published by . This book was released on 1978 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Evolution of Microstructure and Deformation Stability in Zr Nb Sn Fe Alloys Under Neutron Irradiation written by V. N. Shishov and published by . This book was released on 2010 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EFFECTS OF NEUTRON RADIATION OR RADIATION DAMAGE ON NIOBIUM AND NIOBIUM ALLOYS written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
