Grain Size Dependent Crystal Plasticity Finite Element Model For Deformation And Creep Studies In Polycrystalline Ti 6242

Download Grain Size Dependent Crystal Plasticity Finite Element Model For Deformation And Creep Studies In Polycrystalline Ti 6242 full books in PDF, epub, and Kindle. Read online Grain Size Dependent Crystal Plasticity Finite Element Model For Deformation And Creep Studies In Polycrystalline Ti 6242 ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Grain Size Dependent Crystal Plasticity Finite Element Model for Deformation and Creep Studies in Polycrystalline Ti-6242

Author : Gayathri Venkataramani
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (16 download)

DOWNLOAD NOW!

Book Synopsis Grain Size Dependent Crystal Plasticity Finite Element Model for Deformation and Creep Studies in Polycrystalline Ti-6242 by : Gayathri Venkataramani

Download or read book Grain Size Dependent Crystal Plasticity Finite Element Model for Deformation and Creep Studies in Polycrystalline Ti-6242 written by Gayathri Venkataramani and published by . This book was released on 2007 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This thesis is aimed at identifying the critical microstructural parameters that cause local stress concentration due to load shedding between microstructural regions of varying strengths, proposed as one of the fundamental reasons for crack initiation in Ti-6242. A rate dependent, anisotropic, elasto-crystal plasticity based finite element model developed for polyphase Ti-6242 that can account for various microstructural features is used in the present study. A size effect model that relates hardness with the grain size, colony size and lath size in the microstructure of polycrystalline Ti-6242 is developed using different characteristic lengths for different slip systems in the primary fL and transformed 13 regions based on the slip direction. The initial slip system deformation resistances in the crystal plasticity relations are expressed as Hall-Petch type relations based on models of dislocation pileup for various deformation modes. The size-effect parameters are determined from single crystal and colony experiments. The model is validated by comparing the results of simulation with those from constant strain rate and creep tests on polyphase-polycrystalline Ti-6242. The validated model is further used to obtain macroscopic flow stress dependence on grain size and lath size in Ti-6242 through constant strain rate simulations. It is also used to understand the effect of grain size and shape on load-shedding between hard and soft oriented grains and to identify critical microstructural and macrostructural variables responsible for localized stress concentration due to load shedding phenomenon. Various microstructural variables such as grain orientation, misorientation, grain size and Schmid factor and macroscopic variables like composition of phases is considered in a detailed parametric study and the critical combinations of these parameters that result in high stress due to load shedding is identified. Finally load shedding in a realistic microstructure model for polycrystalline Ti-6242 is discussed in which accurate phase volume fractions and orientation and size distributions that are statistically equivalent to those observed in OIM scans are incorporated. The 3D microstructure model accounts for grain shape complexity in load shedding phenomenon and helps in the identification of local hot spots in a realistic microstructure.

Crystal Plasticity Modeling of Polycrystalline Ti-6242 and Study of Local Phenomena

Author : Dhyanjyoti Deka
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (678 download)

DOWNLOAD NOW!

Book Synopsis Crystal Plasticity Modeling of Polycrystalline Ti-6242 and Study of Local Phenomena by : Dhyanjyoti Deka

Download or read book Crystal Plasticity Modeling of Polycrystalline Ti-6242 and Study of Local Phenomena written by Dhyanjyoti Deka and published by . This book was released on 2005 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This work develops an experimentally validated computational model based on crystal plasticity for the analysis of two-phase [alpha]/[beta]Ti-6242 polycrystalline alloys. A rate dependent elasto-crystal plasticity model is incorporated in this model to accommodate anisotropy in material behavior and tension-compression asymmetry inherent to this alloy. A combination of detailed micro-testing, orientation imaging microscopy, computational simulations and minimization process involving Genetic algorithms (GA) is implemented in this study for careful characterization and calibration of the material parameters. Size effects are also considered in this analysis. A homogenized equivalent model of the transformed [beta] colonies is developed for incorporation in the Ti-6242 Finite Element (FE) model. The polycrystalline Ti-6242 computational model is constructed to incorporate accurate phase volume fractions as well as orientation distributions that are statistically equivalent to those observed in the OIM scans. The effects of accurate orientation, misorientation and micro-texture distributions are investigated through simulations using this computational model. The model is used to simulate constant strain rate and creep tests in compression and tension and the results are validated with experiments. The effects of microstructure and creep induced load-shedding on the localization of microstructural stresses and strains are studied for potential crack initiation criteria. Further, the microstructure has been studied at the point of failure in Ti-6242 in tension creep and dwell tests. Critical grains with the highest basal normal stress, stress in the loading direction and equivalent plastic strain are identified in the tension creep test and their specific crystallographic orientations and misorientations are studied. The critical grains in the case of dwell fatigue loading are also identified and a criterion for primary crack nucleation in Ti-6242 is developed.

Crystal Plasticity Finite Element Methods

Author : Franz Roters
Publisher : John Wiley & Sons
ISBN 13 : 3527642099
Total Pages : 188 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!

Book Synopsis Crystal Plasticity Finite Element Methods by : Franz Roters

Download or read book Crystal Plasticity Finite Element Methods written by Franz Roters and published by John Wiley & Sons. This book was released on 2011-08-04 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.

Computational Methods for Microstructure-Property Relationships

Author : Somnath Ghosh
Publisher : Springer Science & Business Media
ISBN 13 : 1441906436
Total Pages : 669 pages
Book Rating : 4.4/5 (419 download)

DOWNLOAD NOW!

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.

Texture Informed Crystal Plasticity Finite Element Modeling of Polycrystalline Material Deformation

Author : Zhe Leng
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (91 download)

DOWNLOAD NOW!

Book Synopsis Texture Informed Crystal Plasticity Finite Element Modeling of Polycrystalline Material Deformation by : Zhe Leng

Download or read book Texture Informed Crystal Plasticity Finite Element Modeling of Polycrystalline Material Deformation written by Zhe Leng and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction between the dislocation and the grain boundaries is also incorporated in the model. For the near grain boundary regions, particular consideration and finite element formula is applied to account for the additional activation energy term as well as the geometric compatibility of the grain boundary during dislocation penetration events, both of the energy term and the geometric barrier depend on the grain boundary character. The formulations applied here provide a reasonable methodology to understand how the interactions between dislocation and grain boundary affect the overall mechanical behavior and the microstructure, and quantitative comparisons of predicted geometrically necessary dislocation distributions with the those determined experimentally indicates a reasonable agreement, further analysis also indicates that stress concentration, as well as the dislocation patterning, depends highly on the grain boundary characters.

Grain Subdivision and Microstructural Interfacial Scale Effects in Polycrystalline Materials

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (656 download)

DOWNLOAD NOW!

Book Synopsis Grain Subdivision and Microstructural Interfacial Scale Effects in Polycrystalline Materials by :

Download or read book Grain Subdivision and Microstructural Interfacial Scale Effects in Polycrystalline Materials written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of this research is to develop a unified physically-based representation of the microstructure in f.c.c. crystalline materials to investigate finite inelastic deformation and failure modes and scenarios at different physical scales that occur due to a myriad of factors, such as texture, grain size and shape, grain subdivision, heterogeneous microstructures, and grain boundary misorientations and distributions. The microstructurally-based formulation for inelastic deformation is based on coupling a multiple-slip crystal plasticity formulation to three distinct dislocation densities, which pertain to statistically stored dislocations (SSDs), geometrically necessary dislocations (GNDs), and grain boundary dislocations (GBDs). This dislocation density based multiple-slip crystal plasticity formulation is then coupled to specialized finite-element methods to predict the scale-dependent microstructural behavior, the evolving heterogeneous microstructure, and the localized phenomena that may contribute to failure initiation for large inelastic strains. The SSD densities provide a representation of cell-type dislocation microstructures and their related processes. The GND densities provide an understanding of the scale-dependent deformation behavior of crystalline materials as a function of grain and aggregate sizes. The GBD densities are formulated to represent the misfit dislocations that arise due to lattice misorientations across GBs, and to provide a framework to investigate the phenomena associated with the grain boundary orientations and distributions. This provides a local criterion of how GB interfaces, such as triple junctions are potential sites for failure initiation and localized behavior. The evolution of the GNDs is used to predict and understand how crystallographic and non-crystallographic microstructures relate to intragranular and intergranular deformation patterns and behavior. Furthermore, a clear understanding of how GB strength cha.

Crystal Plasticity-based Finite Element Analysis of Deformation and Fracture of Polycrystalline Lamellar [gamma]-TiAl + [alpha]-Ti3Al Alloys

Download Crystal Plasticity-based Finite Element Analysis of Deformation and Fracture of Polycrystalline Lamellar [gamma]-TiAl + [alpha]-Ti3Al Alloys PDF Online Free

Author : Surya Batchu
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.:/5 (48 download)

DOWNLOAD NOW!

Book Synopsis Crystal Plasticity-based Finite Element Analysis of Deformation and Fracture of Polycrystalline Lamellar [gamma]-TiAl + [alpha]-Ti3Al Alloys by : Surya Batchu

Download or read book Crystal Plasticity-based Finite Element Analysis of Deformation and Fracture of Polycrystalline Lamellar [gamma]-TiAl + [alpha]-Ti3Al Alloys written by Surya Batchu and published by . This book was released on 2001 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Unified Constitutive Equations for Creep and Plasticity

Author : A.K. Miller
Publisher : Springer Science & Business Media
ISBN 13 : 9400934394
Total Pages : 351 pages
Book Rating : 4.4/5 (9 download)

DOWNLOAD NOW!

Book Synopsis Unified Constitutive Equations for Creep and Plasticity by : A.K. Miller

Download or read book Unified Constitutive Equations for Creep and Plasticity written by A.K. Miller and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constitutive equations refer to 'the equations that constitute the material response' at any point within an object. They are one of the ingredients necessary to predict the deformation and fracture response of solid bodies (among other ingredients such as the equations of equilibrium and compatibility and mathematical descriptions of the configuration and loading history). These ingredients are generally combined together in complicated computer programs, such as finite element analyses, which serve to both codify the pertinent knowledge and to provide convenient tools for making predictions of peak stresses, plastic strain ranges, crack growth rates, and other quantities of interest. Such predictions fall largely into two classes: structural analysis and manufacturing analysis. In the first category, the usual purpose is life prediction, for assessment of safety, reliability, durability, and/or operational strategies. Some high-technology systems limited by mechanical behavior, and therefore requiring accurate life assess ments, include rocket engines (the space-shuttle main engine being a prominent example), piping and pressure vessels in nuclear and non-nuclear power plants (for example, heat exchanger tubes in solar central receivers and reformer tubes in high-temperature gas-cooled reactors used for process heat applications), and the ubiquitous example of the jet engine turbine blade. In structural analysis, one is sometimes concerned with predicting distortion per se, but more often, one is concerned with predicting fracture; in these cases the informa tion about deformation is an intermediate result en route to the final goal of a life prediction.

Grain Boundaries and Crystalline Plasticity

Author : Louisette Priester
Publisher : John Wiley & Sons
ISBN 13 : 1118603109
Total Pages : 240 pages
Book Rating : 4.1/5 (186 download)

DOWNLOAD NOW!

Book Synopsis Grain Boundaries and Crystalline Plasticity by : Louisette Priester

Download or read book Grain Boundaries and Crystalline Plasticity written by Louisette Priester and published by John Wiley & Sons. This book was released on 2013-02-07 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this book is to put forward the fundamental role of grain boundaries in the plasticity of crystalline materials. To understand this role requires a multi-scale approach to plasticity: starting from the atomic description of a grain boundary and its defects, moving on to the elemental interaction processes between dislocations and grain boundaries, and finally showing how the microscopic phenomena influence the macroscopic behaviors and constitutive laws. It involves bringing together physical, chemical and mechanical studies. The investigated properties are: deformation at low and high temperature, creep, fatigue and rupture.

High-Resolution Crystal Plasticity Simulations

Author : Martin Diehl
Publisher : Apprimus Wissenschaftsverlag
ISBN 13 : 386359410X
Total Pages : 138 pages
Book Rating : 4.8/5 (635 download)

DOWNLOAD NOW!

Book Synopsis High-Resolution Crystal Plasticity Simulations by : Martin Diehl

Download or read book High-Resolution Crystal Plasticity Simulations written by Martin Diehl and published by Apprimus Wissenschaftsverlag. This book was released on 2016-03-02 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work the possibilities and capabilities of high-resolution crystal plasticity simulations are presented and discussed. Giving several examples, it is shown how the application of crystal plasticity simulations helps to understand the micro-mechanical behaviour of crystalline materials. To avoid the high computational costs associated with crystal plasticity simulations that arise from (i) the evaluation of the selected constitutive law, and (ii) the solution of the associated mechanical boundary value problem, both contributions to the runtime have to be kept small. This is done by (i) employing a rather simple—and therefore fast—constitutive model, and by (ii) using an effective spectral method employing fast Fourier transforms for solving the partial differential equations describing the mechanical behaviour. Here, an improved spectral solver incorporated into the Düsseldorf Advanced Material Simulation Kit (DAMASK) is used.

Titanium and Titanium Alloys

Author : Christoph Leyens
Publisher : John Wiley & Sons
ISBN 13 : 3527605207
Total Pages : 532 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!

Book Synopsis Titanium and Titanium Alloys by : Christoph Leyens

Download or read book Titanium and Titanium Alloys written by Christoph Leyens and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is an excellent reference for materials scientists and engineers needing to gain more knowledge about these engineering materials. Following introductory chapters on the fundamental materials properties of titanium, readers will find comprehensive descriptions of the development, processing and properties of modern titanium alloys. There then follows detailed discussion of the applications of titanium and its alloys in aerospace, medicine, energy and automotive technology.

Proceedings of the 13th World Conference on Titanium

Author : Vasisht Venkatesh
Publisher : John Wiley & Sons
ISBN 13 : 1119296110
Total Pages : 4024 pages
Book Rating : 4.1/5 (192 download)

DOWNLOAD NOW!

Book Synopsis Proceedings of the 13th World Conference on Titanium by : Vasisht Venkatesh

Download or read book Proceedings of the 13th World Conference on Titanium written by Vasisht Venkatesh and published by John Wiley & Sons. This book was released on 2016-04-26 with total page 4024 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the Proceedings of the 13th World Conference on Titanium.

Crystal Plasticity Study of Heterogeneous Deformation Behavior in ? Matrix Channels During High Temperature Low Stress Creep of Single Crystal Superalloys

Download Crystal Plasticity Study of Heterogeneous Deformation Behavior in ? Matrix Channels During High Temperature Low Stress Creep of Single Crystal Superalloys PDF Online Free

Author : Avinash Hariharan
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (125 download)

DOWNLOAD NOW!

Book Synopsis Crystal Plasticity Study of Heterogeneous Deformation Behavior in ? Matrix Channels During High Temperature Low Stress Creep of Single Crystal Superalloys by : Avinash Hariharan

Download or read book Crystal Plasticity Study of Heterogeneous Deformation Behavior in ? Matrix Channels During High Temperature Low Stress Creep of Single Crystal Superalloys written by Avinash Hariharan and published by . This book was released on 2018 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single crystal nickel-based superalloys have high temperature creep resistance due to particle strengthening by high volume fraction of coherent ? precipitates distributed within nickel-based solid solution ? matrix. In the high temperature low stress regime, published experimental studies reveal that the creep deformation mechanism during the secondary stage is predominantly by dislocation glide in the ? matrix only, and that there is a preferential motion of dislocations in the matrix, oriented in a direction perpendicular to the stress. In this work, the crystal plasticity finite element method is employed to perform creep simulations on a representative volume element in the high temperature and low stress regime. A sine-hyperbolicbased material creep model was used for the matrix, while the precipitates are assumed to be elastic. A softening model incorporating the evolution of mobile dislocation density was used to capture the transition from secondary to tertiary creep. The predicted creep curves agree well with the published experimental measurements on single crystal superalloy CMSX-4. The simulations predict a higher creep strain distribution in the horizontal channel of the matrix (perpendicular to the applied stress) as compared with the vertical channel (horizontal to the applied stress). Local creep strain distributions in the channels were found to be greater than twice their average creep strain. The results provide key insights into the distribution of macroscopic creep strain in the local channels of the ? matrix to further aid in the microstructural design of creep-resistant superalloys.

Investigation of Grain-scale Microstructural Variability in Tantalum Using Crystal Plasticity-finite Element Simulations

Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (982 download)

DOWNLOAD NOW!

Book Synopsis Investigation of Grain-scale Microstructural Variability in Tantalum Using Crystal Plasticity-finite Element Simulations by :

Download or read book Investigation of Grain-scale Microstructural Variability in Tantalum Using Crystal Plasticity-finite Element Simulations written by and published by . This book was released on 2016 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, a crystal plasticity-finite element (CP-FE) model is used to investigate the effects of microstructural variability at a notch tip in tantalum single crystals and polycrystals. It is shown that at the macroscopic scale, the mechanical response of single crystals is sensitive to the crystallographic orientation while the response of polycrystals shows relatively small susceptibility to it. However, at the microscopic scale, the local stress and strain fields in the vicinity of the crack tip are completely determined by the local crystallographic orientation at the crack tip for both single and polycrystalline specimens with similar mechanical field distributions. Variability in the local metrics used (maximum von Mises stress and equivalent plastic strain at 3% deformation) for 100 different realizations of polycrystals fluctuates by up to a factor of 2-7 depending on the local crystallographic texture. Comparison with experimental data shows that the CP model captures variability in stress-strain response of polycrystals that can be attributed to the grain-scale microstructural variability. In conclusion, this work provides a convenient approach to investigate fluctuations in the mechanical behavior of polycrystalline materials induced by grain morphology and crystallographic orientations.

Titanium

Author : Matthew J. Donachie
Publisher : ASM International
ISBN 13 : 161503062X
Total Pages : 381 pages
Book Rating : 4.6/5 (15 download)

DOWNLOAD NOW!

Book Synopsis Titanium by : Matthew J. Donachie

Download or read book Titanium written by Matthew J. Donachie and published by ASM International. This book was released on 2000 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to support the need of engineering, management, and other professionals for information on titanium by providing an overview of the major topics, this book provides a concise summary of the most useful information required to understand titanium and its alloys. The author provides a review of the significant features of the metallurgy and application of titanium and its alloys. All technical aspects of the use of titanium are covered, with sufficient metals property data for most users. Because of its unique density, corrosion resistance, and relative strength advantages over competing materials such as aluminum, steels, and superalloys, titanium has found a niche in many industries. Much of this use has occurred through military research, and subsequent applications in aircraft, of gas turbine engines, although more recent use features replacement joints, golf clubs, and bicycles.Contents include: A primer on titanium and its alloys, Introduction to selection of titanium alloys, Understanding titanium's metallurgy and mill products, Forging and forming, Castings, Powder metallurgy, Heat treating, Joining technology and practice, Machining, Cleaning and finishing, Structure/processing/property relationships, Corrosion resistance, Advanced alloys and future directions, Appendices: Summary table of titanium alloys, Titanium alloy datasheets, Cross-reference to titanium alloys, Listing of selected specification and standardization organizations, Selected manufacturers, suppliers, services, Corrosion data, Machining data.

Grain-Scale Crystal Plasticity Finite Element (FE) Simulations of Waspaloy During Hot Deformation

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)

DOWNLOAD NOW!

Book Synopsis Grain-Scale Crystal Plasticity Finite Element (FE) Simulations of Waspaloy During Hot Deformation by :

Download or read book Grain-Scale Crystal Plasticity Finite Element (FE) Simulations of Waspaloy During Hot Deformation written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report results from a contract tasking Max-Planck-Institute for Eisenforschung as follows: The project aims to understand and predict the mechanical, crystallographic, and topological behavior of gamma grains in Waspaloy during plastic deformation at high temperature. The study will be conducted by use of a crystal plasticity finite element method that updates the local crystallographic and hardening state of the material via integration of the evolution equations for the crystal lattice orientation and the critical resolved shear stress.

Superplasticity in Advanced Materials - ICSAM 2018

Author : Goroh Itoh
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3035733457
Total Pages : 494 pages
Book Rating : 4.0/5 (357 download)

DOWNLOAD NOW!

Book Synopsis Superplasticity in Advanced Materials - ICSAM 2018 by : Goroh Itoh

Download or read book Superplasticity in Advanced Materials - ICSAM 2018 written by Goroh Itoh and published by Trans Tech Publications Ltd. This book was released on 2018-07-20 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes selected and peer reviewed papers presented at the 13th International Conference on Superplasticity in Advanced Materials (ICSAM 2018), August 19-22, 2018, St. Petersburg, Russia. We hope this collection will be interesting and useful for many specialists whose scientific and engineering activity is related to the area of superplastic materials, research of the mechanisms of superplasticity and superplastic processing technologies.