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Author : F. A. Garner
Publisher : ASTM International
ISBN 13 : 0803109628
Total Pages : 919 pages
Book Rating : 4.8/5 (31 download)
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:
Author :
Publisher :
ISBN 13 : 9780803109629
Total Pages : pages
Book Rating : 4.1/5 (96 download)
Download or read book Radiation Induced Changes in Microstructure written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 913 pages
Book Rating : 4.:/5 (131 download)
Download or read book Radiation Induced Changes in Microstructure written by and published by . This book was released on 1987 with total page 913 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank A. Garner
Publisher :
ISBN 13 :
Total Pages : 913 pages
Book Rating : 4.:/5 (246 download)
Download or read book Radiation induced changes in microstructure written by Frank A. Garner and published by . This book was released on 1987 with total page 913 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation-Induced Effects on Microstructure written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Irradiation of materials with particles that are sufficiently energetic to create atomic displacements can induce significant microstructural alteration, ranging from crystalline-to-amorphous phase transitions to the generation of large concentrations of point defect or solute aggregates in crystalline lattices. These microstructural changes typically cause significant changes in the physical and mechanical properties of the irradiated material. A variety of advanced microstructural characterization tools are available to examine the microstructural changes induced by particle irradiation, including electron microscopy, atom probe field ion microscopy, X-ray scattering and spectrometry, Rutherford backscattering spectrometry, nuclear reaction analysis, and neutron scattering and spectrometry. Numerous reviews, which summarize the microstructural changes in materials associated with electron and heavy ion or neutron irradiation, have been published. These reviews have focused on pure metals as well as model alloys, steels, and ceramic materials. In this chapter, the commonly observed defect cluster morphologies produced by particle irradiation are summarized and an overview is presented on some of the key physical parameters that have a major influence on microstructural evolution of irradiated materials. The relationship between microstructural changes and evolution of physical and mechanical properties is then summarized, with particular emphasis on eight key radiation-induced property degradation phenomena. Typical examples of irradiated microstructures of metals and ceramic materials are presented. Radiation-induced changes in the microstructure of organic materials such as polymers are not discussed in this overview.
Author : Ian M. Robertson
Publisher :
ISBN 13 :
Total Pages : 770 pages
Book Rating : 4.3/5 (91 download)
Download or read book Microstructure Evolution During Irradiation: Volume 439 written by Ian M. Robertson and published by . This book was released on 1997-06-25 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book from MRS discusses the evolution of a material's microstructure as a result of its interaction with energetic particles such as ions, neutrons or electrons. The book is inter-disciplinary and emphasizes all classes of materials including metals, intermetallic compounds, ceramics, polymers, superconductors, semiconductors and insulators. A strong focus is placed on experimental techniques for measuring and quantifying damage and microstructure changes, and on computer simulation techniques for predicting and understanding this phenomena. Topics include: ion-implantation damage in semiconductors; radiation damage in metals; radiation damage in ceramics; radiation effects in polymers and beam-induced effects.
Author : N. H. Packan
Publisher : ASTM International
ISBN 13 : 0803112661
Total Pages : 679 pages
Book Rating : 4.8/5 (31 download)
Download or read book Effects of Radiation on Materials written by N. H. Packan and published by ASTM International. This book was released on 1990 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Effects of Radiation on Materials: Fourteenth International Symposium was presented at Andover, MA, June 1988. The symposium was sponsored by ASTM Committee E-10 on Nuclear Technology and Applications. The papers from the first three days of the symposium appear in the two volumes of this publication. Volume I encompasses radiation damage- induced microstructures; point defect, solute, and gas atom effects; atomic-level measurement techniques; and applications of theory. Volume II includes mechanical behavior, all papers dealing with pressure-vessel steels, breeder reactor components, dosimetry, and nuclear fuels. The fourth day of the symposium was devoted to the single topic of reduced-activation materials (see TK9204). The two volumes are separately sold at $127 and $128 respectively; each is independently indexed. Annotation copyrighted by Book News, Inc., Portland, OR.
Author : Ian M. Robertson
Publisher :
ISBN 13 :
Total Pages : 600 pages
Book Rating : 4.3/5 (91 download)
Download or read book Microstructure of Irradiated Materials: Volume 373 written by Ian M. Robertson and published by . This book was released on 1995-04-03 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of the symposium, which was held at the 1994 MRS Fall Meeting, was on the changes produced in the microstructure of metals, ceramics, and semiconductors by irradiation with energetic particles. This proceedings volume contains invited and contributed papers. Among the topics are computer simulation of displacement cascade damage in metals; radiation effects in ceramic insulators; and computer simulation of thermal annealing effects of self implanted silicon. Annotation copyright by Book News, Inc., Portland, OR
Author : Cody Andrew Dennett
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (113 download)
Download or read book Capturing Radiation-induced Microstructure Evolution in Situ Through Direct Property Monitoring written by Cody Andrew Dennett and published by . This book was released on 2019 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced materials development for nuclear systems is currently a time and resource intensive process relying on many iterations of material exposure and destructive testing. There exist few methods for characterizing irradiated material performance in situ, during exposure. Techniques such as in situ TEM or in situ Raman spectroscopy can provide local structural information during irradiation, but no current methods can continuously monitor bulk thermal and mechanical properties. Such a tool would provide the ability to map dose-property relationships at a resolution not previously possible, enhancing mechanistic understanding of irradiation-induced evolution. These methods could also be used to identify the onset of emergent irradiation-induced effects such as the transition from incubation to steady-state void swelling. For this purpose, we have identified transient grating spectroscopy (TGS) as an appropriate technique to obtain these dose-property relationships during irradiation. This method, by optically inducing and monitoring monochromatic surface acoustic waves on materials under investigation, is able to determine the elastic and thermal transport properties of a microns-thick layer at the surface of a sample, the same depth to which ion beams can impose damage. First, we demonstrated that this method is sensitive enough to measure changes in material properties induced by radiation. Afterwards, we designed new optical geometries which enable second-scale time-resolved TGS measurements on dynamically changing materials. In addition, we developed new analytical methods through which multiple material properties, acoustic wave speed and thermal transport properties, may be extracted simultaneously from single-shot measurements. As proof-of-principle experiments, ion irradiation-induced property changes have been measured post-irradiation on pure, single crystal copper. In these copper samples, TGS measurements indicate the presence of volumetric void swelling, which is confirmed with scanning transmission electron microscopy (STEM). These developments together show that TGS is capable of capturing irradiation-induced evolution in real time and motivate the design and commissioning of an in situ experiment for ion beam irradiation and TGS monitoring. To this end, an in situ TGS beamline experiment for concurrent ion beam irradiation and property monitoring has been developed on the 6 MV tandem accelerator at the Ion Beam Laboratory at Sandia National Laboratories. The in situ ion irradiation TGS (I3TGS) facility has the ability to monitor material evolution at high temperatures in real time under ion bombardment. Using high-energy self-ions, we are studying radiation damage effects on the thermomechanical properties of pure metals. In these experiments, irradiation-induced void swelling has been monitored at an orders-of-magnitude finer dose resolution than is possible with traditional methods. This tool has allowed the onset of swelling to be pinpointed in applied dose, a key consideration when developing new materials for use in nuclear systems, on the timescale of days rather than months or years. We are now able to provide the type of rapid, engineering-relevant data necessary to speed the innovation cycle in nuclear materials development. Moving forward, these methods can be used as a screening tool to expedite the design and testing process for advanced nuclear materials.
Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (683 download)
Download or read book The Effect of Low Dose-rate Irradiation on the Microstructure of 304 Stainless Steel written by and published by . This book was released on 1998 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in mechanical and corrosion properties caused by the development of radiation-induced microstructure have relevance to the aging and lifetime extension of light water reactors (LWR's). However, much of the current data related to microstructural development in irradiated metals are generated from studies carried out at much higher dose-rates than encountered in LWR's. An opportunity exists to study the influence of low dose-rate irradiation on microstructural development for a variety of structural and surveillance materials extracted from the experimental breeder reactor EBR-II. In this study, irradiated 304 stainless steel hexagonal ''hex'' duct material is examined in order to compare microstructure in the dose-rate range of 10−7-10−9 dpakec. The samples, taken from the reflector locations in EBR-II, experienced a total dose between 10 and 12 dpa at a temperature of (approximately)375 C. Transmission electron microscopy (TEM) results reveal that there is a moderate dose-rate effect on microstructural development for samples irradiated in the range of 2 x 10−8 to 4 x 10−8 dpa/sec, however a substantial dose rate-effect exists between dose-rates of 2 x 10−8 and 1 x 10−9 dpa/sec Transmission electron microscopy (TEM) results will detail the development of the microstructure in terms of radiation-induced cavities, dislocations, and precipitates.
Author : GS. Was
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (125 download)
Download or read book Influence of Oversized Solute Additions on Radiation-Induced Microstructure and Microchemistry in Austenitic Stainless Steel written by GS. Was and published by . This book was released on 2004 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oversized solute additions (0.3 at% of either Pt or Hf) were found to have a significant effect on microstructural and microchemical evolution in ultra high-purity 316 stainless steel model alloys after proton irradiations at 400°C to nominal doses of 2.5 and 5 dpa. The radiation-induced microstructure of the 316SS base alloy consisted of voids and faulted Frank loops at both dose levels. Platinum addition enhanced void nucleation and increased the loop density and the mean loop diameter. Hafnium addition to 316SS delayed void formation, decreased the mean loop diameter and increased loop density. Grain boundary composition was measured using analytical transmission electron microscopy. Strong radiation-induced grain boundary Cr depletion and Ni enrichment was found in the 316SS base alloy, while oversized element additions reduced segregation levels at low dose. The Pt-doped alloy showed only minor radiation-induced changes in grain boundary composition and no evidence of segregation was observed in the Hf-doped alloy at 2.5 dpa, however, increasing dose resulted in significant radiation-induced segregation in the Hf-doped alloy.
Author : Arvind S. Kumar
Publisher : ASTM International
ISBN 13 : 0803114885
Total Pages : 1319 pages
Book Rating : 4.8/5 (31 download)
Download or read book Effects of Radiation on Materials written by Arvind S. Kumar and published by ASTM International. This book was released on 1994 with total page 1319 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hegel: Wissenschaft der Logik: der Begriff written by and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : HR. Brager
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (125 download)
Download or read book A Reassessment of the Role of Stress in Development of Radiation-Induced Microstructure written by HR. Brager and published by . This book was released on 1979 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data are now accumulating which clearly demonstrate that the stress state plays a strong role in the development of void and dislocation microstructure in metals during neutron irradiation. In these experiments the application of a tensile biaxial stress state at constant fluence and temperature has been found to lead to a progressively decreasing metal density with increasing stress. The effect of stress on the concurrent development of voids, Frank interstitial loops, and dislocation networks has been studied with transmission electron microscopy. The results of these experiments clearly show that the densities of both Frank loops and voids are enhanced by a tensile stress field, with the relevant operating variable being the hydrostatic stress. More importantly it appears that any anisotropy in the stress field is reflected in a corresponding anisotropy that develops in the number of Frank loops that form on the various (111) planes. The loop density that develops on each plane exhibits a clear and direct dependence on the resolved normal stress component at each plane. Although the data from these experiments have been interpreted previously to support the existence of stress-assisted nucleation mechanisms for both loops and voids, further analysis has shown both of these explanations to be deficient in one or more respects, and both models have been replaced.
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Publisher :
ISBN 13 :
Total Pages : 45 pages
Book Rating : 4.:/5 (727 download)
Download or read book Evolution of Microstructure in Face Centered Cubic Metals During Irradiation written by and published by . This book was released on 1993 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: When fcc metals and alloys are irradiated at elevated temperatures, they tend to evolve toward saturation microstructures that are independent of the starting state of the metal and the early details of irradiation history. This leads to property changes and rates of dimensional change that also eventually become independent of the starting state. The evolution of microstructure in complex alloys, especially during the transient regime, is usually determined by the complex interaction of many microstructural and microchemical processes. The more complex the alloy, the more difficult it is to-identify and define the separate influence of each participating mechanism. The use of irradiation studies conducted on simple metals or model alloys assists in understanding the behavior of alloys of engineering relevance. A review of such studies shows that a number of prevailing perceptions of radiation-induced microstructural evolution are not universally correct.
Author : Supriyadi Sadi
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (811 download)
Download or read book Microstructure of Radiation Damage in the Uranium Film and Its Backing Materials Irradiated with 136 MeV 136Xe26 written by Supriyadi Sadi and published by . This book was released on 2012 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructure changes in uranium and uranium/metal alloys due to radiation damage are of great interest in nuclear science and engineering. Titanium has attracted attention because of its similarity to Zr. It has been proposed for use in the second generation of fusion reactors due to its resistance to radiation-induced swelling. Aluminum can be regarded as a standard absorbing material or backing material for irradiation targets. Initial study of thin aluminum films irradiation by 252Cf fission fragments and alpha particles from source has been conducted in the Radiation Center, Oregon State University. Initial study of thin aluminum films irradiation by 252Cf fission fragments and alpha particles from source has been conducted in the Radiation Center, Oregon State University. Aluminum can be regarded as a standard absorbing material or backing material for irradiation targets. The AFM investigation of microstructure damages of thin aluminum surfaces revealed that the voids, dislocation loops and dislocation lines, formed in the thin aluminum films after bombardment by 252Cf fission fragments and alpha particles, depends on the irradiation dose. The void swelling and diameter and depth of voids increase linearly with the fluence of particles and dose; however, the areal density of voids decreased when formation of dislocation loops began. Study of deposition of uranium on titanium backing material by molecular plating and characterization of produced U/Ti film has been performed. The U/Ti film has smooth and uniform surfaces but the composition of the deposits is complex and does not include water molecules which probably involve the presence of U (VI). A possible structure for the deposits has been suggested. X-ray diffraction pattern of U/Ti films showed that The U/Ti film has an amorphous structure. Uranium films (0.500 mg/cm2) and stack of titanium foils (thickness 0.904 mg/cm2) were used to study the microstructural damage of the uranium film and its backing material. Irradiation of U/Ti film and Ti foils with 1 MeV/u (136 MeV) 136Xe26 ions in was performed in the Positive Ion Injector (PII) unit at the Argonne Tandem Linear Accelerator System (ATLAS) Facility at Argonne National Laboratory, IL. Pre- and post- irradiation of samples was analyzed by X-ray diffraction, Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS) and Atomic Force Microscopy (AFM). The irradiation of U/Ti films results in the formation of a crystalline U4O9 phase and polycrystalline Ti phase. Annealing of the thin uranium deposit on a titanium backing at 800°C in the air atmosphere condition for an hour produced a mixture of UO3, U3O, Ti, TiO and TiO2 (rutile) phases; meanwhile, annealing at 800°C for an hour in the argon environment produced a mixture of [beta]-U3O--, Ti and TiO2 (rutile) phases. These phenomena indicate that the damage during irradiation was not due to foil heating. Microstructural damage of irradiated uranium film was dominated by void and bubble formation. The microstructure of irradiated titanium foils is characterized by hillocks, voids, polygonal ridge networks, dislocation lines and dislocation networks. Theory predicts that titanium undergoes an allotropic phase transformation at 882.5 °C, changing from a closed-packed hexagonal crystal structure ([alpha]-phase) into a body-centered cubic crystal structure ([beta]-phase). When the titanium foils were irradiated with 136MeV 136Xe26 at beam intensity of 3 pnA corresponding to 966°C, it was expected that its structure can change from hexagonal-close packed (hcp) to body-centered cubic (bcc). However, in contrast to the theory, transformation from [alpha]-Ti (hcp) phase to fcc-Ti phase was observed. This phenomenon indicates that during irradiation with high energy and elevated temperature, the fcc-Ti phase more stable than the hcp-Ti Phase.
Author : Roger E. Stoller
Publisher : ASTM International
ISBN 13 : 080311477X
Total Pages : 1315 pages
Book Rating : 4.8/5 (31 download)
Download or read book Effects of Radiation on Materials written by Roger E. Stoller and published by ASTM International. This book was released on 1992 with total page 1315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Symposium held in Nashville, Tennessee, June 1990. Almost two-thirds of these 91 papers are authored by researchers outside of the US (including information on research in the former USSR, Japan, and Europe). Topics include: current commercial power reactor systems; microstructural characterization
