Download or read book Modelling Microstructural Evolution of Fusion Reactor Materials written by Toby Scott Hudson and published by . This book was released on 2004 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiscale Modeling and Experiments on Microstructural Evolution in Nuclear Materials written by Y. F. Zhang and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Damage Analysis and Fundamental Studies for Fusion Reactor Materials Development Progress Report December 1 1986 December 31 1990 written by and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The philosophy of the program at the University of California Santa Barbara has been to develop a fundamental understanding of both the basic damage processes and microstructural evolution that take place in a material during neutron irradiation and the consequent dimensional and mechanical property changes. This fundamental understanding can be used in conjunction with empirical data obtained from a variety of irradiation facilities to develop physically-based models of neutron irradiation effects in structural materials. The models in turn can be used to guide alloy development and to help extrapolate the irradiation data base (expected to be largely fission reactor based) to the fusion reactor regime. This philosophy is consistent with that of the national and international programs for developing structural materials for fusion reactors.
Download or read book The Fusion Reactor Materials Program Plan written by Task Group on Damage Analysis and Fundamental Studies and published by . This book was released on 1978 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Defect Cluster Evolution in Irradiated Structural Materials written by and published by . This book was released on 2015 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exposure of metallic structural materials to irradiation environments results in significant microstructural evolution, property changes, and performance degradation, which limits the extended operation of current generation light water reactors and restricts the design of advanced fission and fusion reactors. Further, it is well recognized that these irradiation effects are a classic example of inherently multiscale phenomena and that the mix of radiation-induced features formed and the corresponding property degradation depend on a wide range of material and irradiation variables. This inherently multiscale evolution emphasizes the importance of closely integrating models with high-resolution experimental characterization of the evolving radiation-damaged microstructure. Lastly, this article provides a review of recent models of the defect microstructure evolution in irradiated body-centered cubic materials, which provide good agreement with experimental measurements, and presents some outstanding challenges, which will require coordinated high-resolution characterization and modeling to resolve.
Download or read book Damage Analysis and Fundamental Studies for Fusion Reactor Materials Development written by and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The philosophy of the program at the University of California Santa Barbara has been to develop a fundamental understanding of both the basic damage processes and microstructural evolution that take place in a material during neutron irradiation and the consequent dimensional and mechanical property changes. This fundamental understanding can be used in conjunction with empirical data obtained from a variety of irradiation facilities to develop physically-based models of neutron irradiation effects in structural materials. The models in turn can be used to guide alloy development and to help extrapolate the irradiation data base (expected to be largely fission reactor based) to the fusion reactor regime. This philosophy is consistent with that of the national and international programs for developing structural materials for fusion reactors.
Download or read book Multiscale Modeling and Experiments on Microstructural Evolution in Nuclear Materials written by Yongfeng Zhang and published by . This book was released on 2015 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Composite Model of Microstructural Evolution in Austenitic Stainless Steel Under Fast Neutron Irradiation written by GR. Odette and published by . This book was released on 1987 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rate-theory-based model has been developed which includes the simultaneous evolution of the dislocation and cavity components of the microstructure of irradiated austenitic stainless steels. Previous work has generally focused on developing models for void swelling while neglecting the time dependence of the dislocation structure. These models have broadened our understanding of the physical processes that give rise to swelling, for example, the role of helium and void formation from critically-sized bubbles. That work has also demonstrated some predictive capability by successful calibration to fit the results of fast reactor swelling data. However, considerable uncertainty about the values of key parameters in these models limits their usefulness as predictive tools. Hence, the use of such models to extrapolate fission reactor swelling data to fusion reactor conditions is compromised.
Download or read book Microstructural Evolution in an Austenitic Stainless Steel Fusion Reactor First Wall written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed rate-theory-based model of microstructural evolution under fast neutron irradiation has been developed. The prominent new aspect of this model is a treatment of dislocation evolution in which Frank faulted loops nucleate, grow and unfault to provide a source for network dislocations while the dislocation network can be simultaneously annihilated by a climb/glide process. The predictions of this model compare very favorably with the observed dose and temperature dependence of these key microstructural features over a broad range. This new description of dislocation evolution has been coupled with a previously developed model of cavity evolution and good agreement has been obtained between the predictions of the composite model and fast reactor swelling data as well. The results from the composite model also reveal that the various components of the irradiation-induced microstructure evolve in a highly coupled manner. The predictions of the composite model are more sensitive to parametric variations than more simple models. Hence, its value as a tool in data analysis and extrapolation is enhanced.
Download or read book Modelling of Microstructural Evolution in Creep Resistant Materials written by A. Strang and published by CRC Press. This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: These are the proceedings of the fourth in a series of specialist international conferences on the microstructure of high temperature materials, held at Imperial College, London in September 1998. The papers address various aspects of the modelling of the microstructural evolution of creep resistant materials due to high temperature service exposure. The continuing importance of this subject was evident from the diversity of contributions which attracted 80 delegates from 15 countries.
Download or read book Microstructural Evolution During Dual ion Irradiation of Candidate Fusion Reactor Materials written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Single- and dual-ion (heavy ions + 3He) irradiations of Fe-20wt.%Ni-15wt.%Cr, V-15wt.%Cr and Ti-6wt.%Al-4wt.%V alloys have been performed over a range of temperatures and doses. Various features of microstructural evolution during irradiation are reported as determined by transmission electron microscopy and Auger spectroscopy investigations.
Download or read book Multi Physics and Multi Scale Modeling and Simulation Methods for Nuclear Reactor Application written by Xingjie Peng and published by Frontiers Media SA. This book was released on 2024-02-28 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nuclear reactor operates in an environment where complex multi-physics and multi-scale phenomena exist, and it requires consideration of coupling among neutronics, thermal hydraulics, fuel performance, chemical dynamics, and coupling between the reactor core and first circuit. Safe, reliable, and economical operation can be achieved by leveraging high-fidelity numerical simulation, and proper considerations for coupling among different physics and required to provide powerful numerical simulation tools. In the past simplistic models for some of the physics phenomena are used, with the recent development of advanced numerical methods, software design, and high-performance computing power, the appeal of multi-physics and multi-scale modeling and simulation has been broadened.
Download or read book Fusion Energy Update written by and published by . This book was released on 1980 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Voorlopige grondwet van de Indonesische Republiek written by and published by . This book was released on 1950 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Materials Modeling written by Sidney Yip and published by Springer Science & Business Media. This book was released on 2007-11-17 with total page 2903 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first reference of its kind in the rapidly emerging field of computational approachs to materials research, this is a compendium of perspective-providing and topical articles written to inform students and non-specialists of the current status and capabilities of modelling and simulation. From the standpoint of methodology, the development follows a multiscale approach with emphasis on electronic-structure, atomistic, and mesoscale methods, as well as mathematical analysis and rate processes. Basic models are treated across traditional disciplines, not only in the discussion of methods but also in chapters on crystal defects, microstructure, fluids, polymers and soft matter. Written by authors who are actively participating in the current development, this collection of 150 articles has the breadth and depth to be a major contributor toward defining the field of computational materials. In addition, there are 40 commentaries by highly respected researchers, presenting various views that should interest the future generations of the community. Subject Editors: Martin Bazant, MIT; Bruce Boghosian, Tufts University; Richard Catlow, Royal Institution; Long-Qing Chen, Pennsylvania State University; William Curtin, Brown University; Tomas Diaz de la Rubia, Lawrence Livermore National Laboratory; Nicolas Hadjiconstantinou, MIT; Mark F. Horstemeyer, Mississippi State University; Efthimios Kaxiras, Harvard University; L. Mahadevan, Harvard University; Dimitrios Maroudas, University of Massachusetts; Nicola Marzari, MIT; Horia Metiu, University of California Santa Barbara; Gregory C. Rutledge, MIT; David J. Srolovitz, Princeton University; Bernhardt L. Trout, MIT; Dieter Wolf, Argonne National Laboratory.
Download or read book Modeling the Microstructural Evolution of Parts During Metal Additive Manufacturing written by Kevin Mcnamara and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal additive manufacturing is a promising technology for building complex functional parts for many industrial applications. A major challenge for the successful implementation of this technology is the currently limited ability of manufacturers to reliably predict the properties of the part before printing it. This challenge stems from the dynamic nature of the layer-by-layer build process, which causes a nonuniform thermal history and a complex microstructural history throughout the part. The task of predicting the final microstructure and related properties of the part is nontrivial due to the lack of robust kinetic models for nonisothermal phase transformations, particularly for multiphase alloy systems that undergo multiple simultaneous phase transformations. A computational microstructural model was developed to track the microstructural evolution of the part during the metal additive manufacturing build process. This model is a modified version of the Johnson-Mehl-Avrami model for nonisothermal phase transformations and can be applied to any material system that undergoes solid-state phase transformations if its transformation kinetics are known. The transformation kinetics for two common additively manufactured superalloys, Inconel 718 and Ti-6Al-4V, were derived using thermodynamic data and kinetic theory. Using the derived kinetics along with the parts thermal history as inputs, the microstructural model outputs the phase fraction history of the part during the build. This model was applied to Inconel 718 and Ti-6Al-4V, each built by two different metal additive manufacturing processes: powder bed fusion and directed energy deposition. Mechanical property tests and characterization were performed on an Inconel 718 part built by powder bed fusion for validation of the microstructural model. A computational tool was developed using MATLAB that implements the microstructural model to calculate the phase fraction history of the part during the build and provides a user interface to inspect the thermal and microstructural history throughout the part. A link can be made between microstructure and properties in order to predict the properties of the part. Using the visualization tool, the user can analyze the microstructure throughout the part to develop methods to optimize the process in order to achieve improved part properties.
Download or read book Modeling Microstructural Evolution and Phase Transformations in Material Science written by Muhammad Ajmal Choudhary and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
