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Dislocation Based Modeling Of Creep Deformation And Fracture In Modified 9cr 1mo Steels
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Book Synopsis Dislocation-based Modeling of Creep Deformation and Fracture in Modified 9Cr-1Mo Steels by : Mehdi Basirat
Download or read book Dislocation-based Modeling of Creep Deformation and Fracture in Modified 9Cr-1Mo Steels written by Mehdi Basirat and published by . This book was released on 2018 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The very high-temperature reactor (VHTR) represents the next generation of high temperature gas-cooled reactors designed for the future nuclear power plants. The VHTR is operated at higher pressure and temperature for longer time compared with the Pressurized Water Reactors (PWRs). Modified 9Cr-1Mo steel is a suitable candidate material for VHTR pressure vessels. Although 9Cr-1Mo steel has good creep resistance, its microstructure degrades during manufacturing processes such as welding or high temperature operation. Hence, investigating the creep resistance of welded 9Cr-1Mo steel is crucial. In this research, a micromechanical model is developed for the evaluation of creep deformation and rupture times of modified 9Cr-1Mo steel specimens. Creep deformation in metals is generally induced by dislocation generation, motion, and annihilation. Evolution of the dislocation density was modeled by considering the generation and annihilation of single and dipole dislocations. In addition to dislocation motion, there are several other factors which determine the creep resistance of this steel. Among these, the most significant are precipitate coarsening, solid solutions depletion, and void/crack nucleation and growth. The evolution of these mechanisms was accounted for by introducing specific continuum damage terms. In this study a one-dimensional (1-D) model was successfully applied to specimens made of the as-received 9Cr-1Mo steel. Comparison of the numerical model results with experimental data showed satisfactory agreement. However, a 1-D model has several limitations including applicability limitation to only 1-D stress state problems, and the inability of studying components made of more than one material. Therefore, developing a three-dimensional (3-D) comprehensive model is required to meet the objective of this research which was the prediction of creep life in welded joints made of modified 9Cr-1Mo steel. The developed 1-D model was modified and implemented in the commercial finite element software ABAQUS by means of a User Material Subroutine (UMAT). The creep of welded 9Cr-1Mo specimens was simulated by considering different material behavior in the heat affected zone (HAZ) and the welded material. Several creep experiments were conducted on 9Cr-1Mo welded specimens. The tensile creep tests were performed at a temperature range of 550-700 °C and stress level of 80-200 MPa. Finally, simulation results were compared to experiments, and excellent agreement was obtained between experiments and simulations.
Book Synopsis Deformation and Evolution of Life in Crystalline Materials by : Xijia Wu
Download or read book Deformation and Evolution of Life in Crystalline Materials written by Xijia Wu and published by CRC Press. This book was released on 2019-04-09 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book walks you through the fundamental deformation and damage mechanisms. It lends the reader the key to open the doors into the maze of deformation/fracture phenomena under various loading conditions. Furthermore it provides the solution method to material engineering design and analysis problems, for those working in the aerospace, automotive or energy industries. The book introduces the integrated creep-fatigue theory (ICFT) that considers holistic damage evolution from surface/subsurface crack nucleation to propagation in coalescence with internally-distributed damage/discontinuities.
Book Synopsis Modeling of Rate Dependent Deformation of Metals and Alloys Using the Viscoplasticity Theory Based on Overstress by : Patrick S. Majors
Download or read book Modeling of Rate Dependent Deformation of Metals and Alloys Using the Viscoplasticity Theory Based on Overstress written by Patrick S. Majors and published by . This book was released on 1993 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coal Power Plant Materials and Life Assessment by : A. Shibli
Download or read book Coal Power Plant Materials and Life Assessment written by A. Shibli and published by Elsevier. This book was released on 2014-07-24 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to their continuing role in electricity generation, it is important that coal power plants operate as efficiently and cleanly as possible. Coal Power Plant Materials and Life Assessment reviews the materials used in coal plants, and how they can be assessed and managed to optimize plant operation. Part I considers the structural alloys used in coal plants. Part II then reviews performance modelling and life assessment techniques, explains the inspection and life-management approaches that can be adopted to optimize long term plant operation, and considers the technical and economic issues involved in meeting variable energy demands. Summarizes key research on coal-fired power plant materials, their behavior under operational loads, and approaches to life assessment and defect management Details the range of structural alloys used in coal power plants, and the life assessment techniques applicable to defect-free components under operational loads Reviews the life assessment techniques applicable to components containing defects and the approaches that can be adopted to optimize plant operation and new plant and component design
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Creep-Resistant Steels by : Fujio Abe
Download or read book Creep-Resistant Steels written by Fujio Abe and published by Elsevier. This book was released on 2008-03-14 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt: Creep-resistant steels are widely used in the petroleum, chemical and power generation industries. Creep-resistant steels must be reliable over very long periods of time at high temperatures and in severe environments. Understanding and improving long-term creep strength is essential for safe operation of plant and equipment. This book provides an authoritative summary of key research in this important area.The first part of the book describes the specifications and manufacture of creep-resistant steels. Part two covers the behaviour of creep-resistant steels and methods for strengthening them. The final group of chapters analyses applications in such areas as turbines and nuclear reactors.With its distinguished editors and international team of contributors, Creep-resistant steels is a valuable reference for the power generation, petrochemical and other industries which use high strength steels at elevated temperatures. Describes the specifications and manufacture of creep-resistant steels Strengthening methods are discussed in detail Different applications are analysed including turbines and nuclear reactors
Book Synopsis Physics Of Creep And Creep-Resistant Alloys by : F R N Nabarro
Download or read book Physics Of Creep And Creep-Resistant Alloys written by F R N Nabarro and published by CRC Press. This book was released on 2018-05-08 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique in its approach, this introduction to the physics of creep concentrates on the physical principles underlying observed phenomena. As such it provides a resource for graduate students in materials science, metallurgy, mechanical engineering, physics and chemistry as well as researchers in other fields. Following a brief mathematical treatment, the authors introduce creep phenomena together with some empirical laws and observations. The mechanisms of creep and diffusion under varying experimental conditions are subsequently analysed and developed. The second half of the text considers alloying in greater detail as well as exploring the structure and properties of superalloys and stress effects in these materials.
Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Machinery, Materials Science and Engineering Application IX by : M. Chen
Download or read book Advances in Machinery, Materials Science and Engineering Application IX written by M. Chen and published by IOS Press. This book was released on 2023-11-14 with total page 1172 pages. Available in PDF, EPUB and Kindle. Book excerpt: New engineering materials, techniques and applications are constantly being researched and developed, and keeping up to speed with the latest advances is crucial for engineers if they are to successfully address the challenges they face in their work. This book presents the selected proceedings of MMSE2023, the 9th International Conference on Advances in Machinery, Materials Science and Engineering Applications, jointly organized by the SAE-Supmeca, France and China University of Geosciences (Wuhan) and held on 22 and 23 July 2023 in Wuhan, China. For the past 12 years, this annual conference has collated recent advances and experiences, identified emerging trends and provided a platform for participants from academia and industry to exchange information and views, helping to address the world’s machinery and engineering challenges. The book contains 4 sections: mechanical engineering, material science and manufacturing technology; electrical engineering, automation and control; modeling, simulation and optimization techniques in engineering; and advanced engineering technologies and applications. A total of 241 submissions were received for MMSE2023, of which 151 papers were selected for the conference and for publication by means of a rigorous international peer-review process. These papers present exciting ideas and methods that will open novel research directions for different communities. Offering a current overview of the latest research and applications in machinery and materials-science engineering, the book will be of interest to all those working in the field.
Book Synopsis Modelling and Analysis of Creep Deformation and Fracture in a 1 Cr 1/2 Mo Ferritic Steel by : B. F. Dyson
Download or read book Modelling and Analysis of Creep Deformation and Fracture in a 1 Cr 1/2 Mo Ferritic Steel written by B. F. Dyson and published by . This book was released on 1993 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Integrity Assessment by : Raghu V. Prakash
Download or read book Structural Integrity Assessment written by Raghu V. Prakash and published by . This book was released on 2020 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains selected papers from the Second Quadrennial International Conference on Structural Integrity (ICONS-2018). The papers cover important topics related to structural integrity of critical installations, such as power plants, aircrafts, spacecrafts, defense and civilian components. The focus is on assuring safety of operations with high levels of reliability and structural integrity. This volume will be of interest to plant operators working with safety critical equipment, engineering solution providers, software professionals working on engineering analysis, as well as academics working in the area. .
Book Synopsis Micromechanisms in Particle-Hardened Alloys by : J. W. Martin
Download or read book Micromechanisms in Particle-Hardened Alloys written by J. W. Martin and published by Cambridge University Press. This book was released on 1980-07-10 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was first published in 1980. A great number of metallic materials in practical use owe their strength to the presence in their microstructure of particles of a hard precipitated phase. The text emphasises the importance of scientific rather than empirical methods in attempting to develop particle-hardened alloys. The author progresses from an elementary knowledge of metallurgy to theories relating to the deformation and fracture of alloys of this type. He also discusses the use of such theories to describe observations on both model materials and practical metals. After a discussion of the microstructures of these alloys, how they form and how to describe them quantitatively, their deformation and fracture behaviour at both low and elevated temperatures are examined.
Download or read book JSME International Journal written by and published by . This book was released on 2000 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling and Analysis of Creep Deformation and Fracture in a 1 Cr Half Mo Ferritic Steel by : Basil H. Dyson
Download or read book Modelling and Analysis of Creep Deformation and Fracture in a 1 Cr Half Mo Ferritic Steel written by Basil H. Dyson and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite Element Modelling of Creep Crack Growth in 316 Stainless and 9Cr-1Mo Steels by :
Download or read book Finite Element Modelling of Creep Crack Growth in 316 Stainless and 9Cr-1Mo Steels written by and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The failure behavior of steels under sustained and cyclic loads has been addressed. The constitutive behavior of the two steels have been represented by the conventional strain-hardening law and the Murakami-Ohno model for reversed and cyclic loads. The laws have been implemented into the research finite element code FVP. Post processors for FVP to calculate various path independent integral fracture parameters have been written. Compact tension C(T) specimens have been tested under sustained and cyclic loads with both the load point displacement and crack growth monitored during the tests. FE models with extremely refined meshes for the C(T) specimens were prepared and the experiment simulated numerically. Results from this analysis focus on the differences between the various constitutive models as well as the fracture parameters in characterizing the creep crack growth of the two steels.
