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Atomistic Modeling Of Dislocation Interface Interactions
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Book Synopsis Atomistic Modeling of Dislocation-interface Interactions by :
Download or read book Atomistic Modeling of Dislocation-interface Interactions written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using atomic scale models and interface defect theory, we first classify interface structures into a few types with respect to geometrical factors, then study the interfacial shear response and further simulate the dislocation-interface interactions using molecular dynamics. The results show that the atomic scale structural characteristics of both heterophases and homophases interfaces play a crucial role in (i) their mechanical responses and (ii) the ability of incoming lattice dislocations to transmit across them.
Book Synopsis Atomistic Modeling of Dislocation-interface Interaction by :
Download or read book Atomistic Modeling of Dislocation-interface Interaction written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamental Aspects of Dislocation Interactions by : G. Kostorz
Download or read book Fundamental Aspects of Dislocation Interactions written by G. Kostorz and published by Elsevier. This book was released on 2013-09-03 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures III covers the papers presented at a European Research Conference on Plasticity of Materials-Fundamental Aspects of Dislocation Interactions: Low-Energy Dislocation Structures III, held on August 30-September 4, 1992 in Ascona, Switzerland. The book focuses on the processes, technologies, reactions, transformations, and approaches involved in dislocation interactions. The selection first offers information on work softening and Hall-Petch hardening in extruded mechanically alloyed alloys and dynamic origin of dislocation structures in deformed solids. Discussions focus on stress-strain behavior in relation to composition, structure, and annealing; comparison of stress-strain curves with work softening theory; sweeping and trapping mechanism; and model of dipolar wall structure formation. The text then ponders on plastic instabilities and their relation to fracture and dislocation and kink dynamics in f.c.c. metals studied by mechanical spectroscopy. The book takes a look at misfit dislocation generation mechanisms in heterostructures and evolution of dislocation structure on the interfaces associated with diffusionless phase transitions. Discussions focus on dislocation representation of a wall of elastic domains; equation of equilibrium of an elastic domain; transformation of dislocations; and theoretical and experimental background. The selection is a valuable reference for readers interested in dislocation interactions.
Book Synopsis Atomistically Informed Dislocation Dynamics Simulations on Dislocation-interface Interactions by :
Download or read book Atomistically Informed Dislocation Dynamics Simulations on Dislocation-interface Interactions written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atomistic Modeling of Dislocation Motion at Experimental Time-scales by : Sepehr Saroukhani
Download or read book Atomistic Modeling of Dislocation Motion at Experimental Time-scales written by Sepehr Saroukhani and published by . This book was released on 2017 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accurate prediction of the rate of dislocation motion is key to the fidelity of multi-scale plasticity models of metals and alloys. In this dissertation, atomistic simulations and rate theories based on statistical mechanics are used to accurately predict the rate of three main dislocation motion mechanisms: 1) Dislocation motion across precipitates 2) Dislocation motion through a field of obstacles 3) Dislocation motion via kink-pair nucleation For these mechanisms, the accuracy of both conventional and modern rate theories is examined by comparing their predictions to benchmarks obtained from MD simulations. Different variants of the Harmonic Transition State Theory, as the most common rate theory in the literature, are found to provide grossly inaccurate predictions for all three problems. It is shown that the inaccuracy of these approaches stems from their assumptions about the entropy barrier. The original version of HTST estimates the entropy barrier by the harmonic vibrational entropy, which is found to be inaccurate for all three problems due to thermal softening. Other versions of HTST based on simple estimates of the attempt frequency consider smaller values for the vibrational entropy, and hence provide even more inaccurate predictions. Furthermore, all variants of HTST neglect the configurational entropy, which turns out to be significant for the kink-pair nucleation problem. The utility of the Finite Temperature string method for computing a reaction coordinate and a free energy profile was examined for the three problems. The method provides an accurate reaction channel for dislocation-obstacle interactions but fails to provide a reasonable free energy profile. The reasons are investigated and discussed in the first paper presented in this dissertation. The original version of the method fails to provide a reaction channel for the kink-pair nucleation problem because it has not been designed for problems with multiple reaction channels. To address this issue, a modification to the approach based on physical intuitions about the problem is proposed and is shown to be effective. Different variants of the Transition Interface Sampling approach, as a modern rate theory, are found to be capable of accurately predicting the rate for all three problems. TIS and its Path Swapping version are found to be effective for dislocation-precipitate interactions. The method is also accurate in the jerky motion regime of dislocation motion through a field of solutes. For the smooth motion regime, however, the Partial Path version of TIS -- designed for diffusive barriers -- had to be used. In order to provide accurate predictions for the kink-pair nucleation problem, TIS had to be modified based on physical intuitions about the problem because the method has not been designed for problems with multiple reaction channels such as the glide of screw dislocations in BCC transition metals. The performance of the Meyer-Neldel (MN) rule, as the most common entropy estimation approach in material mechanics, is examined for the three problems. It is shown that the method accurately predicts the entropy barrier for dislocation-precipitate interactions but fails to fully explain the entropy barrier for the other two problems. The assumptions and the...
Book Synopsis Atomistic Modeling of Materials Failure by : Markus J. Buehler
Download or read book Atomistic Modeling of Materials Failure written by Markus J. Buehler and published by Springer Science & Business Media. This book was released on 2008-08-07 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an introduction to molecular and atomistic modeling techniques applied to fracture and deformation of solids, focusing on a variety of brittle, ductile, geometrically confined and biological materials. The overview includes computational methods and techniques operating at the atomic scale, and describes how these techniques can be used to model cracks and other deformation mechanisms. The book aims to make new molecular modeling techniques available to a wider community.
Book Synopsis Advances in Heterogeneous Material Mechanics 2011 by : Jinghong Fan
Download or read book Advances in Heterogeneous Material Mechanics 2011 written by Jinghong Fan and published by DEStech Publications, Inc. This book was released on 2011 with total page 1205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Introduction to Composite Materials by : D. Hull
Download or read book An Introduction to Composite Materials written by D. Hull and published by Cambridge University Press. This book was released on 1996-08-13 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition has been greatly enlarged and updated to provide both scientists and engineers with a clear and comprehensive understanding of composite materials. In describing both theoretical and practical aspects of their production, properties and usage, the book crosses the borders of many disciplines. Topics covered include: fibres, matrices, laminates and interfaces; elastic deformation, stress and strain, strength, fatigue crack propagation and creep resistance; toughness and thermal properties; fatigue and deterioration under environmental conditions; fabrication and applications. Coverage has been increased to include polymeric, metallic and ceramic matrices and reinforcement in the form of long fibres, short fibres and particles. Designed primarily as a teaching text for final-year undergraduates in materials science and engineering, this book will also interest undergraduates and postgraduates in chemistry, physics, and mechanical engineering. In addition, it will be an excellent source book for academic and technological researchers on materials.
Author :The Minerals, Metals & Materials Society (TMS) Publisher :John Wiley & Sons ISBN 13 :1119093481 Total Pages :1584 pages Book Rating :4.1/5 (19 download)
Book Synopsis TMS 2015 144th Annual Meeting and Exhibition by : The Minerals, Metals & Materials Society (TMS)
Download or read book TMS 2015 144th Annual Meeting and Exhibition written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2015-02-26 with total page 1584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The TMS 2015 Annual Meeting Supplemental Proceedings is a collection of papers from the TMS 2015 Annual Meeting & Exhibition, held March 15-19 in Orlando, Florida, USA. The papers in this volume represent 33 symposia from the meeting. This volume, along with the other proceedings volumes published for the meeting, and archival journals, such as Metallurgical and Materials Transactions and Journal of Electronic Materials, represents the available written record of the 73 symposia held at TMS2015. This proceedings volume contains both edited and unedited papers; the unedited papers have not necessarily been reviewed by the symposium organizers and are presented "as is." The opinions and statements expressed within the papers are those of the individual authors only, and no confirmations or endorsements are intended or implied.
Book Synopsis Atomistic Modeling of Slip on Internal and External Interfaces by : Erman Guleryuz
Download or read book Atomistic Modeling of Slip on Internal and External Interfaces written by Erman Guleryuz and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal interfaces in polycrystals and external interfaces between contacting solids play an important role in mechanical phenomena such as plastic deformation and frictional sliding. The understanding of relaxation mechanisms at these interfaces is critical in functionality control, particularly at the nanometer-scale where interfaces dominate. This thesis is concerned with the atomistic modeling of relaxation mechanisms on two types of interfaces: (1) grain boundaries (GBs) in polycrystals under high nanoindentation stresses; (2) atomic-scale single-asperity contacts during stick-slip friction.
Book Synopsis TMS 2015 144th Annual Meeting & Exhibition, Annual Meeting Supplemental Proceedings by : The Minerals, Metals & Materials Society (TMS)
Download or read book TMS 2015 144th Annual Meeting & Exhibition, Annual Meeting Supplemental Proceedings written by The Minerals, Metals & Materials Society (TMS) and published by Springer. This book was released on 2016-12-20 with total page 1496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sculpture written by and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Material in the Programs and invitations ephemera collection includes invitations to official events, dinner invitations honouring visiting dignitaries, dance cards, award presentations, openings, commemorative and sporting programs. Some programs and invitations may also include menus.
Book Synopsis Atomistic and Continuum Modeling of Nanocrystalline Materials by : Laurent Capolungo
Download or read book Atomistic and Continuum Modeling of Nanocrystalline Materials written by Laurent Capolungo and published by Springer Science & Business Media. This book was released on 2010-03-17 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomistic and Continuum Modeling of Nanocrystalline Materials develops a complete and rigorous state-of-the-art analysis of the modeling of the mechanical behavior of nanocrystalline (NC) materials. Among other key topics, the material focuses on the novel techniques used to predict the behavior of nanocrystalline materials. Particular attention is given to recent theoretical and computational frameworks combining atomistic and continuum approaches. Also, the most relevant deformation mechanisms governing the response of nanocrystalline materials are addressed and discussed in correlation with available experimental data.
Book Synopsis Fracture of Nano and Engineering Materials and Structures by : E.E. Gdoutos
Download or read book Fracture of Nano and Engineering Materials and Structures written by E.E. Gdoutos and published by Springer Science & Business Media. This book was released on 2008-01-08 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 16th European Conference of Fracture (ECF16) was held in Greece, July, 2006. It focused on all aspects of structural integrity with the objective of improving the safety and performance of engineering structures, components, systems and their associated materials. Emphasis was given to the failure of nanostructured materials and nanostructures including micro- and nano-electromechanical systems (MEMS and NEMS).
Book Synopsis Computational Methods for Microstructure-Property Relationships by : Somnath Ghosh
Download or read book Computational Methods for Microstructure-Property Relationships written by Somnath Ghosh and published by Springer Science & Business Media. This book was released on 2010-11-17 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational Methods for Microstructure-Property Relationships introduces state-of-the-art advances in computational modeling approaches for materials structure-property relations. Written with an approach that recognizes the necessity of the engineering computational mechanics framework, this volume provides balanced treatment of heterogeneous materials structures within the microstructural and component scales. Encompassing both computational mechanics and computational materials science disciplines, this volume offers an analysis of the current techniques and selected topics important to industry researchers, such as deformation, creep and fatigue of primarily metallic materials. Researchers, engineers and professionals involved with predicting performance and failure of materials will find Computational Methods for Microstructure-Property Relationships a valuable reference.
Author :The Minerals, Metals & Materials Society (TMS) Publisher :John Wiley & Sons ISBN 13 :1118062124 Total Pages :987 pages Book Rating :4.1/5 (18 download)
Book Synopsis TMS 2011 140th Annual Meeting and Exhibition, Materials Fabrication, Properties, Characterization, and Modeling by : The Minerals, Metals & Materials Society (TMS)
Download or read book TMS 2011 140th Annual Meeting and Exhibition, Materials Fabrication, Properties, Characterization, and Modeling written by The Minerals, Metals & Materials Society (TMS) and published by John Wiley & Sons. This book was released on 2011-04-12 with total page 987 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the most up-to-date information on the state of Materials Fabrication, Properties, Characterization, and Modeling. It's a great mix of practical applied technology and hard science, which is of invaluable benefit to the global industry.
Book Synopsis Handbook of Nanomaterials Properties by : Bharat Bhushan
Download or read book Handbook of Nanomaterials Properties written by Bharat Bhushan and published by Springer Science & Business Media. This book was released on 2014-03-13 with total page 1467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials attract tremendous attention in recent researches. Although extensive research has been done in this field it still lacks a comprehensive reference work that presents data on properties of different Nanomaterials. This Handbook of Nanomaterials Properties will be the first single reference work that brings together the various properties with wide breadth and scope.
