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Micromechanism of Cleavage Fracture of Metals

Micromechanism of Cleavage Fracture of Metals
  • Author : Jianhong Chen,Rui Cao
  • Publisher :Unknown
  • Release Date :2014-09-15
  • Total pages :486
  • ISBN : 9780128010518
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Summary : 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

The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Alloy Steel

The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Alloy Steel
  • Author : Heikki Kotilainen
  • Publisher :Unknown
  • Release Date :1980
  • Total pages :133
  • ISBN : UIUC:30112008833524
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Summary :

Micromechanisms and Toughness for Cleavage Fracture of Steel

Micromechanisms and Toughness for Cleavage Fracture of Steel
  • Author : A. R. Rosenfield,B. S. Majumdar,BATTELLE MEMORIAL INST COLUMBUS OH.
  • Publisher :Unknown
  • Release Date :1986
  • Total pages :14
  • ISBN : OCLC:227681551
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Summary : 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.

The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Allow Steel

The Micromechanisms of Cleavage Fracture and Their Relationship to Fracture Toughness in a Bainitic Low Allow Steel
  • Author : H. Kotilainen
  • Publisher :Unknown
  • Release Date :1980
  • Total pages :229
  • ISBN : OCLC:841094905
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Summary :

Fracture and Fatigue

Fracture and Fatigue
  • Author : J. C. Radon
  • Publisher :Unknown
  • Release Date :2017-01-31
  • Total pages :498
  • ISBN : 9781483149714
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Summary : Fracture and Fatigue: Elasto-Plasticity, Thin Sheet and Micromechanisms Problems covers the proceedings of the Third Colloquium on Fracture. The book discusses the development and applications of fracture mechanics. The contents of the text are organized according to the areas of concerns. The first part deals with elasto-plastic fracture mechanics, which includes topics such as fracture mechanics in the elastic-plastic regime and sizing of the geometry dependence and significance of maximum load toughness values. Part II covers the micromechanisms of fracture, which includes the aspects of crack growth under monotonic loading and the effect of secondary hardening on the fracture toughness of a bainitic microstructure. Part III concerns itself with thin sheet fracture mechanics, which includes R-curves evaluation for center-cracked panels and use of the R-curve for design with contained yield. The book will be of great interest to researchers and professionals whose work involves fracture mechanics.

Micromechanisms of Cleavage Fracture in Structural Steels

Micromechanisms of Cleavage Fracture in Structural Steels
  • Author : Wei Zhou
  • Publisher :Unknown
  • Release Date :1991
  • Total pages :259
  • ISBN : OCLC:60112497
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Summary :

Developments in Fracture Mechanics: The mechanics and mechanisms of fracture in metals

Developments in Fracture Mechanics: The mechanics and mechanisms of fracture in metals
  • Author : G. G. Chell
  • Publisher :Unknown
  • Release Date :1981
  • Total pages :328
  • ISBN : STANFORD:36105000779889
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Summary :

Fracture Mechanics

Fracture Mechanics
  • Author : R. A. Smith
  • Publisher :Unknown
  • Release Date :2013-10-22
  • Total pages :254
  • ISBN : 9781483158914
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Summary : Fracture Mechanics: Current Status, Future Prospects presents the remarkable increase in the number of tools available for engineers to deal with cracked structures in a quantitative manner. This book discusses the acceptance of the stress intensity factor as a distinguishing similitude parameter that properly accounts for the applied mechanics near crack tips in several cases of practical interest. Organized into nine chapters, this book begins with an overview of the competing micromechanics of fracture, including cleavage, rupture, ductile fracture, and intergranular creep fracture. This text then reviews the characterization of crack tip stress fields by the stress intensity factor. Other chapters consider the analysis of fatigue cracking in a large generator rotor. This book discusses as well the use of Green's functions in the determination of stress intensity factors. The final chapter deals with the size effect with regard to extension of sharp cracks in technological materials. This book is a valuable resource for environmental and mechanical engineers.

Structural materials

Structural materials
  • Author : Richard Palmer Reed,Z. S. Xing,E. W. Collings
  • Publisher :Unknown
  • Release Date :1988
  • Total pages :229
  • ISBN : PSU:000017035576
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Summary :

The 'Local Approach' to Cleavage Fracture

The 'Local Approach' to Cleavage Fracture
  • Author : C S Wiesner
  • Publisher :Unknown
  • Release Date :1995-12-14
  • Total pages :70
  • ISBN : UOM:39015038563352
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Summary : This report assesses the current state of knowledge of the 'local approach' to cleavage fracture, reviews application to ferritic steels and their weldments and addresses limitations and disadvantages of the methodology.

Physical Aspects of Fracture

Physical Aspects of Fracture
  • Author : Elisabeth Bouchaud,Dominique Jeulin,Claude Prioul,Stéphane Roux
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :371
  • ISBN : 9789401006569
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Summary : The main scope of this Cargese NATO Advanced Study Institute (June 5-17 2000) was to bring together a number of international experts, covering a large spectrum of the various Physical Aspects of Fracture. As a matter of fact, lecturers as well as participants were coming from various scientific communities: mechanics, physics, materials science, with the common objective of progressing towards a multi-scale description of fracture. This volume includes papers on most materials of practical interest: from concrete to ceramics through metallic alloys, glasses, polymers and composite materials. The classical fields of damage and fracture mechanisms are addressed (critical and sub-critical quasi-static crack propagation, stress corrosion, fatigue, fatigue-corrosion . . . . as well as dynamic fracture). Brittle and ductile fractures are considered and a balance has been carefully kept between experiments, simulations and theoretical models, and between the contributions of the various communities. New topics in damage and fracture mechanics - the effect of disorder and statistical aspects, dynamic fracture, friction and fracture of interfaces - were also explored. This large overview on the Physical Aspects of Fracture shows that the old barriers built between the different scales will soon "fracture". It is no more unrealistic to imagine that a crack initiated through a molecular dynamics description could be propagated at the grain level thanks to dislocation dynamics included in a crystal plasticity model, itself implemented in a finite element code. Linking what happens at the atomic scale to fracture of structures as large as a dam is the new emerging challenge.

Fracture, Plastic Flow and Structural Integrity in the Nuclear Industry

Fracture, Plastic Flow and Structural Integrity in the Nuclear Industry
  • Author : P. B. Hirsch
  • Publisher :Unknown
  • Release Date :2019-11-11
  • Total pages :212
  • ISBN : 9781000724806
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Summary : This volume brings together the papers presented at the 7th Symposium organised by the Technical Advisory Group on Structural Integrity of Nuclear Plant (TAGS!) which was held at the TWI Conference Centre, Great Abington, UK on 29 April 1999. The Symposium, which marked 25 years of TAGSI and its predecessor, the Light Water Reactor Study Group (LWRSG), was dedicated to Sir Alan Cottrell FREng, FRS, whose impact on the fields of integrity, reliability and safety of engineering structures and components has been second to none.

Mechanical Behaviour of Materials

Mechanical Behaviour of Materials
  • Author : Dominique François,André Pineau,André Zaoui
  • Publisher :Unknown
  • Release Date :2012-03-06
  • Total pages :646
  • ISBN : 9789400725461
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Summary : Advances in technology are demanding ever-increasing mastery over the materials being used: the challenge is to gain a better understanding of their behaviour, and more particularly of the relations between their microstructure and their macroscopic properties. This work, of which this is the first volume, aims to provide the means by which this challenge may be met. Starting from the mechanics of deformation, it develops the laws governing macroscopic behaviour – expressed as the constitutive equations – always taking account of the physical phenomena which underlie rheological behaviour. The most recent developments are presented, in particular those concerning heterogeneous materials such as metallic alloys, polymers and composites. Each chapter is devoted to one of the major classes of material behaviour. As the subtitles indicate, Volume 1 deals with micro- and macroscopic constitutive behaviour and Volume 2 with damage and fracture mechanics. A third volume will be devoted to exercises and their full solutions complementing the content of these two first volumes. Most of the chapters end with a set of exercises, to many of which either the full solution or hints on how to obtain this are given; each volume is profusely illustrated with explanatory diagrams and with electron-microscope photographs. This book, now in its second edition, has been rigorously re-written, updated and modernised for a new generation. The authors improved the existing material, in particular in modifying the organisation, and added new up-to-date content. Understanding the subject matter requires a good knowledge of solid mechanics and materials science; the main elements of these fields are given in a set of annexes at the end of the first volume. The authors also thought it interesting for the readers to give as footnotes some information about the many scientists whose names are attached to theories and formulae and whose memories must be celebrated. Whilst the present book, as well as Volume 2, is addressed primarily to graduate students, part of it can be used in undergraduate courses; and it is hoped that practising engineers and scientists will find the information it conveys useful. It is the authors’ hope also that English-speaking readers will want to learn about the aspects of French culture, and more particularly of the French school of micromechanics of materials, which this treatment undoubtedly displays.

Ductile Fracture

Ductile Fracture
  • Author : Thomas Pardoen,Jacques Besson,R. Chaouadi
  • Publisher :Unknown
  • Release Date :2017-07-12
  • Total pages :229
  • ISBN : 1848218303
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Summary :

Advances in Fracture Resistance and Structural Integrity

Advances in Fracture Resistance and Structural Integrity
  • Author : V.V. Panasyuk,M.C. Pandey,O.Ye. Andreykiv,J.F. Knott,P. Rama Rao,R. O. Ritchie,D.M.R. Taplin
  • Publisher :Unknown
  • Release Date :2012-12-02
  • Total pages :781
  • ISBN : 9780080983738
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Summary : The 8th International Conference on Fracture (ICF8), held in Kyiv, Ukraine, attracted 550 delegates from 30 countries with over 700 papers presented. This volume contains a representative selection of 72 articles of the highest standard from internationally renowned experts in the field. Principal topics covered include: mechanics and criteria of fracture, stress-strain analysis in solids with cracks, physics and mechanics of fracture, dynamic fracture, environmental effects, temperature influence on fracture, advanced and special-purpose materials engineering applications of fracture mechanics, fracture mechanics and strength of welded joints and structures, testing techniques and failure diagnostics. For anyone working in fracture mechanics and the performance of materials, this volume provides a valuable snapshot of the major recent developments in the field.

Micromechanisms of Fracture and Fatigue

Micromechanisms of Fracture and Fatigue
  • Author : Jaroslav Pokluda,Pavel Šandera
  • Publisher :Unknown
  • Release Date :2010-05-27
  • Total pages :293
  • ISBN : 1849962669
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Summary : 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.

Elastic-plastic Fracture Test Methods

Elastic-plastic Fracture Test Methods
  • Author : E. T. Wessel
  • Publisher :Unknown
  • Release Date :1985-01-01
  • Total pages :424
  • ISBN : 0803104197
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Summary :

Methods of Fracture Mechanics: Solid Matter Physics

Methods of Fracture Mechanics: Solid Matter Physics
  • Author : G.P. Cherepanov
  • Publisher :Unknown
  • Release Date :2013-03-09
  • Total pages :322
  • ISBN : 9789401722629
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Summary : Modern fracture mechanics considers phenomena at many levels, macro and micro; it is therefore inextricably linked to methods of theoretical and mathematical physics. This book introduces these sophisticated methods in a straightforward manner. The methods are applied to several important phenomena of solid state physics which impinge on fracture mechanics: adhesion, defect nucleation and growth, dislocation emission, sintering, the electron beam effect and fractal cracks. The book shows how the mathematical models for such processes may be set up, and how the equations so formulated may be solved and interpreted. The many open problems which are encountered will provide topics for MSc and PhD theses in fracture mechanics, and in theoretical and experimental physics. As a supplementary text, the book can be used in graduate level courses on fracture mechanics, solid matter physics, and mechanics of solids, or in a special course on the application of fracture mechanics methods in solid matter physics.

Fatigue and Fracture of Traditional and Advanced Structural Alloys

Fatigue and Fracture of Traditional and Advanced Structural Alloys
  • Author : Filippo Berto
  • Publisher :Unknown
  • Release Date :2021-04-01
  • Total pages :222
  • ISBN : 9783036503660
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Summary : The fatigue behavior of traditional and advanced materials is a very relevant topic in different strategic applications impacting and affecting our daily lives. The present Special Issue invites papers to update readers on the state of the art on this important topic. Both review and original manuscripts are welcome. Special attention will be dedicated to innovative materials and innovative manufacturing processes or post-treatments able to improve the fatigue life and reliability of a structural component. Scale effect will be also fully treated focusing on different applications and multiscale approaches aimed at understanding structural integrity under cyclic loadings. This state of the art perspective will help engineers, designers and people from the academy gain an updated view on this very challenging topic which is nowadays very important due to the advances in manufacturing technologies that allow complex new materials to be fabricated.

Fracture of Nano and Engineering Materials and Structures

Fracture of Nano and Engineering Materials and Structures
  • Author : E.E. Gdoutos
  • Publisher :Unknown
  • Release Date :2008-01-08
  • Total pages :1416
  • ISBN : 1402049722
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Summary : 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).

Progress in Fracture Mechanics

Progress in Fracture Mechanics
  • Author : G. C. Sih,D. Francois
  • Publisher :Unknown
  • Release Date :2014-06-28
  • Total pages :192
  • ISBN : 9781483190402
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Summary : Progress in Fracture Mechanics: Fracture Mechanics Research and Technological Activities of Nations around the World is a collection of papers that presents the contemporary state of fracture mechanics research in different countries. This collection arises from the need to access various fracture mechanics materials in one publication, since fracture mechanics varies in parameters, methods of testing, and jargons. This text will be of great use to students, researchers, and practitioners of materials science.