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Micromechanism Of Cleavage Fracture Of Metals
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Book Synopsis Micromechanism of Cleavage Fracture of Metals by : Jianhong Chen
Download or read book Micromechanism of Cleavage Fracture of Metals written by Jianhong Chen and published by Butterworth-Heinemann. This book was released on 2014-09-15 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book the authors focus on the description of the physical nature of cleavage fracture to offer scientists, engineers and students a comprehensive physical model which vividly describes the cleavage microcracking processes operating on the local (microscopic) scale ahead of a defect. The descriptions of the critical event and the criteria for cleavage fracture will instruct readers in how to control the cleavage processes and optimize microstructure to improve fracture toughness of metallic materials. Physical (mechanical) processes of cleavage fracture operating on the local (microscopic) scale, with the focus on the crack nucleation and crack propagation across the particle/grain and grain/grain boundaries Critical event, i.e., the stage of greatest difficulty in forming the microcrack, which controls the cleavage fracture Criteria triggering the cleavage microcracking with incorporation of the actions of macroscopic loading environment into the physical model Effects of microstructure on the cleavage fracture, including the effects of grain size, second phase particles and boundary Comprehensive description of the brittle fracture emerging in TiAl alloys and TiNi memory alloys
Book Synopsis The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Alloy Steel by : Heikki Kotilainen
Download or read book The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Alloy Steel written by Heikki Kotilainen and published by . This book was released on 1980 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Micromechanisms and Toughness for Cleavage Fracture of Steel by : A. R. Rosenfield
Download or read book Micromechanisms and Toughness for Cleavage Fracture of Steel written by A. R. Rosenfield and published by . This book was released on 1986 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete understanding of the fracture mechanisms of steel in the ductile/brittle transition region requires analysis not only of crack initiation, but also of crack propagation. This paper reviews micrographic and fractographic experiments that give insight into both phenomena, and suggests a frame-work through which both may be related. Unstable cleavage crack initiation can occur after some blunting of the original fatigue precrack or after some stable crack growth. In either event, instability appears to be triggered by the fracture of a brittle micro-constituent ahead of the precrack. The large scatter in reported KIc values within the transition region reflects the size distribution and relative scarcity of these trigger particles. While a large number of models have attempted to correlate toughness in the ductile/brittle transition regime to events occurring ahead of the crack tip, surprisingly little attention has been paid to events occurring behind the crack front. Fractographic evidence as well as metallographic sectioning of arrested cracks show that the mechanism of rapid crack propagation by cleavage is affected strongly by partial crack-plane deflection which leaves unbroken ligaments in its wake. The tearing of these ligaments by dimple-rupture is the dominant energy-absorbing mechanism. Etch-pit experiments using an Fe-Si alloy show that the crack-tip stress intensity based on plastic zone size is extremely low. Keywords: HSLA(High Strength Low Alloy), Ductile fracture, Shear fracture, Fracture toughness.
Book Synopsis The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Allow Steel by : H. Kotilainen
Download or read book The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Allow Steel written by H. Kotilainen and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Minerals, Metals and Materials Society. Fall Meeting Publisher :Minerals, Metals, & Materials Society ISBN 13 : Total Pages :408 pages Book Rating :4.F/5 ( download)
Book Synopsis Cleavage Fracture by : Minerals, Metals and Materials Society. Fall Meeting
Download or read book Cleavage Fracture written by Minerals, Metals and Materials Society. Fall Meeting and published by Minerals, Metals, & Materials Society. This book was released on 1997 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This symposium, held during Materials Week '97 in Indianapolis, Indiana, September 14-18, 1997, was dedicated to Dr. George R. Erwin, Professor Emeritus of the University of Maryland. The symposium proceedings is a collection of 29 papers and 10 abstracts on the subjects of fracture mechanics; dislocation theory of fracture; atomistic fracture; micromechanical and microstructural modeling of cleavage; cleavage mechanisms, fractographic characterization; experimental techniques; and cleavage studies in metals, welds, intermetallics, ceramics, and minerals. The diverse topics reflect the wide range of disciplines that Professor Irwin has impacted through his pioneering work on fracture mechanics.
Book Synopsis Developments in Fracture Mechanics: The mechanics and mechanisms of fracture in metals by : G. G. Chell
Download or read book Developments in Fracture Mechanics: The mechanics and mechanisms of fracture in metals written by G. G. Chell and published by Elsevier Science & Technology. This book was released on 1981 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Micromechanisms of cleavage fracture in polycrystalline iron by : Charles J. MacMahon
Download or read book Micromechanisms of cleavage fracture in polycrystalline iron written by Charles J. MacMahon and published by . This book was released on 1964 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Micromechanisms of Fracture and Fatigue by : Jaroslav Pokluda
Download or read book Micromechanisms of Fracture and Fatigue written by Jaroslav Pokluda and published by Springer Science & Business Media. This book was released on 2010-05-27 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micromechanisms of Fracture and Fatigue forms the culmination of 20 years of research in the field of fatigue and fracture. It discusses a range of topics and comments on the state of the art for each. The first part is devoted to models of deformation and fracture of perfect crystals. Using various atomistic methods, the theoretical strength of solids under simple and complex loading is calculated for a wide range of elements and compounds, and compared with experimental data. The connection between the onset of local plasticity in nanoindentation tests and the ideal shear strength is analysed using a multi-scale approach. Moreover, the nature of intrinsic brittleness or ductility of perfect crystal lattices is demonstrated by the coupling of atomistic and mesoscopic approaches, and compared with brittle/ductile behaviour of engineering materials. The second part addresses extrinsic sources of fracture toughness of engineering materials, related to their microstructure and microstructurally-induced crack tortuosity. Micromechanisms of ductile fracture are also described, in relation to the fracture strain of materials. Results of multilevel modelling, including statistical aspects of microstructure, are used to explain remarkable phenomena discovered in experiments. In the third part of the book, basic micromechanisms of fatigue cracks propagation under uniaxial and multiaxial loading are discussed on the basis of the unified mesoscopic model of crack tip shielding and closure, taking both microstructure and statistical effects into account. Applications to failure analysis are also outlined, and an attempt is made to distinguish intrinsic and extrinsic sources of materials resistance to fracture. Micromechanisms of Fracture and Fatigue provides scientists, researchers and postgraduate students with not only a deep insight into basic micromechanisms of fracture behaviour of materials, but also a number of engineering applications.
Book Synopsis Micromechanisms of Cleavage Fracture in Polycrystalline Iron by : Charles J McMahon (Jr)
Download or read book Micromechanisms of Cleavage Fracture in Polycrystalline Iron written by Charles J McMahon (Jr) and published by . This book was released on 1964 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The initiation and propagation of cleavage microcracks in coarse-grained vacuum-melted ferrite, containing 0.035 and 0.007 per cent carbon, were studied by means of tensile tests carried out between room temperature and -196 C, and by special metallographic procedures. Cleavage microcracks develop in ferrite during the strain-hardening portion of the stress-strain curve at low temperatures, and are initiated mainly by cracks which form in the carbides. Twinning does not play an important role in crack initiation over the entire temperature range studied. Carbide cracks during plastic deformation at all temperatures investigated, but they lead to microcracks in the ferrite only when the applied stress is high enough to permit the carbide cracks to act as Griffith cracks. Carbide cracks also lead to the formation of large voids during the necking of specimens tested in the ductile and transition temperature regions. Pre-existing twins provide strong barriers to microcrack propagation. Twinning also causes the disappearance of the discontinuous-yield phenomenon at low temperatures. A model for microcrack initiation by carbide cracking is proposed, and the conditions leading to brittle fracture are discussed. (Author).
Book Synopsis Basic Fracture Mechanics and its Applications by : Ashok Saxena
Download or read book Basic Fracture Mechanics and its Applications written by Ashok Saxena and published by CRC Press. This book was released on 2022-12-27 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a comprehensive guide to fracture mechanics and its applications, providing an in-depth discussion of linear elastic fracture mechanics and a brief introduction to nonlinear fracture mechanics. It is an essential companion to the study of several disciplines such as aerospace, biomedical, civil, materials and mechanical engineering. This interdisciplinary textbook is also useful for professionals in several industries dealing with design and manufacturing of engineering materials and structures. Beginning with four foundational chapters, discussing the theory in depth, the book also presents specific aspects of how fracture mechanics is used to address fatigue crack growth, environment assisted cracking, and creep and creep-fatigue crack growth. Other topics include mixed-mode fracture and materials testing and selection for damage tolerant design, alongside in-depth discussions of ensuring structural integrity of components through real-world examples. There is a strong focus throughout the book on the practical applications of fracture mechanics. It provides a clear description of the theoretical aspects of fracture mechanics and also its limitations. Appendices provide additional background to ensure a comprehensive understanding and every chapter includes solved example problems and unsolved end of chapter problems. Additional instructor support materials are also available.
Book Synopsis Fracture Mechanics of Metals, Composites, Welds, and Bolted Joints by : Bahram Farahmand
Download or read book Fracture Mechanics of Metals, Composites, Welds, and Bolted Joints written by Bahram Farahmand and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the preliminary stage of designing new structural hardware to perform a given mission in a fluctuating load environment, there are several factors that the designer should consider. Trade studies for different design configurations should be performed and, based on strength and weight considerations, among others, an optimum configuration selected. The selected design must withstand the environment in question without failure. Therefore, a comprehensive structural analysis that consists of static, dynamic, fatigue, and fracture is necessary to ensure the integrity of the structure. Engineers must also consider the feasibility of fabricating the structural hardware in the material selection process. During the past few decades, fracture mechanics has become a necessary discipline for the solution of many structural problems in which the survivability of structure containing pre-existing flaws is of great interest. These problems include structural failures resulting from cracks that are inherent in the material, or defects that are introduced in the part due to improper handling or rough machining, that must be assessed through fracture mechanics concepts.
Book Synopsis Ductile Fracture of Metals by : P. F. Thomason
Download or read book Ductile Fracture of Metals written by P. F. Thomason and published by Pergamon. This book was released on 1990 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: An account of the recent developments in research into ductile fracture in metals and alloys. Aspects covered include localized fracture at the root of notches and sharp cracks, and fracture in bulk plastic-deformation processes of the metal and metal forming type. Also discusses various theoretical
Book Synopsis George R. Irwin Symposium on Cleavage Fracture by :
Download or read book George R. Irwin Symposium on Cleavage Fracture written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This symposium was originally proposed to TMS under the title of "Cleavage Fracture: Theory, Experimentation, and Modeling." The goal of the symposium was to be an in-depth coverage of the recent work on the phenomena of cleavage fracture in the presence of plastic flow. After the initial call-for-papers went out, subsequent discussion with Professor Ronald W. Armstrong, University of Maryland, led to the dedication of this symposium to Professor George R. Irwin for his landmark contributions to the field of fracture mechanics and its applications to cleavage fracture. The George R. Irwin Symposium on Cleavage Fracture is a companion symposium to the Frank A. McClintock Symposium on ductile fracture, which was held earlier in February 1997 at the TMS Annual Meeting in Orlando, Florida. The initial response to the Irwin Symposium was overwhelming with more than sixty tentative titles submitted. Unfortunately, some authors had to withdraw later for various reasons. The final program consists of thirty-nine papers organized into five sessions, with one on the biography of Professor Irwin to be presented at the symposium banquet by Professor H.P. Rossmanith, Institute of Mechanics, Vienna University of Technology. The symposium proceedings is a collection of twenty nine papers and ten abstracts on the subjects of fracture mechanics, dislocation theory of fracture, atomistic fracture, micromechanical and microstructural modeling of cleavage, cleavage mechanisms, fractographic characterization, experimental techniques, and cleavage studies in metals, welds, intermetallics, ceramics, and minerals. The diverse topics reflect the wide range of disciplines that Professor Irwin has impacted through his pioneer work on fracture mechanics.
Book Synopsis Plasticity and Fracture by : Wolfgang Brocks
Download or read book Plasticity and Fracture written by Wolfgang Brocks and published by Springer. This book was released on 2017-08-16 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on 40 years of research and teaching in the fields of fracture mechanics and plasticity. It will bring students and engineers from various disciplines up to date on key concepts that have become increasingly important in the design of safety-relevant engineering structures in general and in modern lightweight structures in the transportation industry in particular. Primarily intended for graduate students in the engineering sciences and practicing structural engineers, it employs a multidisciplinary approach that comprises theoretical concepts, numerical methods, and experimental techniques. In addition, it includes a wealth of analytical and numerical examples, used to illustrate the applications of the concepts discussed.
Book Synopsis A Summary of the Theory of Fracture in Metals by : J. W. Spretnak
Download or read book A Summary of the Theory of Fracture in Metals written by J. W. Spretnak and published by . This book was released on 1961 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Mechanics and Physics of Fracture by : Metals Society. Activity Group Committee I.
Download or read book The Mechanics and Physics of Fracture written by Metals Society. Activity Group Committee I. and published by . This book was released on 1975 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue and Fracture by : F. C. Campbell
Download or read book Fatigue and Fracture written by F. C. Campbell and published by ASM International. This book was released on 2012-01-01 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book emphasizes the physical and practical aspects of fatigue and fracture. It covers mechanical properties of materials, differences between ductile and brittle fractures, fracture mechanics, the basics of fatigue, structural joints, high temperature failures, wear, environmentally-induced failures, and steps in the failure analysis process."--publishers website.
