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Experimental Investigation Of The Brittle To Ductile Transition In Fracture Of Single Crystal Silicon
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Book Synopsis Experimental Investigation of the Brittle to Ductile Transition in Fracture of Single Crystal Silicon by : Brian James Gally
Download or read book Experimental Investigation of the Brittle to Ductile Transition in Fracture of Single Crystal Silicon written by Brian James Gally and published by . This book was released on 1999 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of the Mechanisms of Brittle-to-ductile Transition of Clevage Fracture in Silicon Single Crystals by : K. Jimmy Hsia
Download or read book Experimental Study of the Mechanisms of Brittle-to-ductile Transition of Clevage Fracture in Silicon Single Crystals written by K. Jimmy Hsia and published by . This book was released on 1993 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Brittle to Ductile Transitions in Cleavage Fracture: Experiments and Simulations by :
Download or read book Brittle to Ductile Transitions in Cleavage Fracture: Experiments and Simulations written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Final report summarizing the experimental studies of crack arrest in Si single crystals and associated computer simulations of key crack tip processes controlling the brittle to ductile transition from cleavage to tough behavior.
Book Synopsis Fracture and Ductile Vs. Brittle Behavior - Theory, Modelling and Experiment: Volume 539 by : Glenn E. Beltz
Download or read book Fracture and Ductile Vs. Brittle Behavior - Theory, Modelling and Experiment: Volume 539 written by Glenn E. Beltz and published by . This book was released on 1999-04-16 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dramatic progress has been made in the fundamentals of fracture, with special emphasis on the ductile/brittle transition across a broad spectrum of material classes. Unfortunately, however, since these studies are carried out in diverse research communities, communication among the different groups is limited. This book brings these diverse groups together. Contributions generally follow the topical outline upon which the symposium was organized. Part I deals with brittle/ductile behavior of steels and structural metallic alloys. The development of analytical models based on micromechanical models, such as dislocation mechanics and cohesive/contact zone models, is the focus of Part II. Nonmetals, including silicon, are reviewed in Parts III and IV. Fractals, chaos, and scaling theories, with emphasis on fracture in heterogeneous solids, is the basis of Part V. Crystal plasticity and mesoscale dislocation modelling follow in Part VI, with the technologically significant area of interfacial fracture featured in Part VII.
Book Synopsis Brittle to Ductile Transition in Cleavage Fracture by :
Download or read book Brittle to Ductile Transition in Cleavage Fracture written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of interpretation of fracture transition from brittle to ductile or vice versa is the subject of study. An instrumented tapered double cantilever beam (TDCB) has been developed as a definitive tool in the study of the intrinsic mechanism in single crystalline samples. In this experiment, the crack velocity is directly proportional to actuator velocity. In experiments performed on TDCB shaped Si single crystals, oriented for cleavage on either [l brace]111[r brace] or [l brace]110[r brace] planes, a number of troubling features of jerky carck extension were encountered. Evidence suggests that nucleation of dislocation loops from crack tip is easier than moving these dislocations away from crack tip. 14 refs, 1 fig.
Book Synopsis Ductile Mode Cutting of Brittle Materials by : Kui Liu
Download or read book Ductile Mode Cutting of Brittle Materials written by Kui Liu and published by Springer Nature. This book was released on 2019-10-12 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a systematic and comprehensive interdisciplinary overview of ductile mode cutting of brittle materials, covering a range of topics from the fundamental physics to engineering practices. Discussing the machining mechanics and material properties, it explains the fundamental mechanism of ductile-to-brittle transition in the cutting of brittle materials. It also presents theoretical modeling and molecular dynamic simulation to demonstrate that ductile mode cutting can be achieved under certain conditions, as well as extensive experimental studies that produced smooth and damage-free surfaces on different materials, such as silicon, glass, tungsten carbide and calcium fluoride. Lastly, it explores how the ductile mode cutting performance and machinability of brittle materials can be further improved by hybrid machining processes like ultrasonic vibration and thermal-assisted cutting technologies in order to meet industry demands.
Book Synopsis Multi-paradigm Modeling of Mode I&II Dynamic Fracture Mechanisms in Single Crystal Silicon by : Alan Cohen (S. B.)
Download or read book Multi-paradigm Modeling of Mode I&II Dynamic Fracture Mechanisms in Single Crystal Silicon written by Alan Cohen (S. B.) and published by . This book was released on 2008 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition to its semi-conducting properties, silicon has the ability to be manipulated with high precision at very small length- scales. This property makes it very useful in the design of Nano/Micro-Electromechanical Systems (N/MEMS) and similar technologies. The understanding of fracture of silicon is crucial for the engineering process and the development of robust devices. However, the mechanisms of fracture in silicon are complex and are still not fully understood. Several experimental studies of fracture have been reported, however, these often lack insight into atomistic mechanisms of fracture. Ab initio computational methods (e.g. based on Density Functional Theory) to study silicon that are able to provide a fundamental description of the complex fracture mechanisms remain an open challenge. In particular, the mechanisms that lead to brittle cleavage or to the transition to ductile behavior of silicon at higher temperatures remains an open question. Empirical molecular dynamics (MD) studies have proven successful in simulating silicon fracture, but are unreliable and most models could not be validated against experimental results. Here we propose to use MD modeling based on a novel first principles reactive force fields ReaxFF, which has shown to be an accurate model to describe fracture processes of silicon. Two numerical methods are used here to study fracture mechanisms in silicon: a multi-paradigm model employing reactive and non-reactive force fields, and a fully reactive model. The CMDF and GRASP are used for the simulation of brittle fracture mechanisms in mode I and mode II loading conditions, as well as simulations of the brittle-to-ductile transition (BDT). Our results indicate that CMDF is suitable for modeling silicon brittle fracture, but has limitations during the study of the mechanisms involved in the BDT. GRASP provides a suitable framework for BDT study, and the results in this study provide for the first time an observation of the BDT without the use of an empirical model. In this thesis we report, for the first time, the direct atomistic simulation of the BTD in silicon, revealing the microscopic atomistic mechanisms that explains this drastic change in the behavior of silicon.
Book Synopsis Brittle to Ductile Transition in Cleavage Fracture. Final Techical Report, April 1, 1987--June 30, 1991 by :
Download or read book Brittle to Ductile Transition in Cleavage Fracture. Final Techical Report, April 1, 1987--June 30, 1991 written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of interpretation of fracture transition from brittle to ductile or vice versa is the subject of study. An instrumented tapered double cantilever beam (TDCB) has been developed as a definitive tool in the study of the intrinsic mechanism in single crystalline samples. In this experiment, the crack velocity is directly proportional to actuator velocity. In experiments performed on TDCB shaped Si single crystals, oriented for cleavage on either {l_brace}111{r_brace} or {l_brace}110{r_brace} planes, a number of troubling features of jerky carck extension were encountered. Evidence suggests that nucleation of dislocation loops from crack tip is easier than moving these dislocations away from crack tip. 14 refs, 1 fig.
Book Synopsis Diamond Turn Machining by : R. Balasubramaniam
Download or read book Diamond Turn Machining written by R. Balasubramaniam and published by CRC Press. This book was released on 2017-09-01 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this book is to familiarize professionals, researchers, and students with the basics of the Diamond Turn Machining Technology and the various issues involved. The book provides a comprehensive knowledge about various aspects of the technology including the background, components of the machine, mechanism of material removal, application areas, relevant metrology, and advances taking place in this domain. Solved and unsolved examples are provided in each of the areas which will help the readers to practice and get familiarized with that particular area of the Diamond Turn Machining process.
Book Synopsis IUTAM Symposium on Multiscale Modeling and Characterization of Elastic-Inelastic Behavior of Engineering Materials by : S. Ahzi
Download or read book IUTAM Symposium on Multiscale Modeling and Characterization of Elastic-Inelastic Behavior of Engineering Materials written by S. Ahzi and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers in this proceeding are a collection of the works presented at the IUTAM symposium-Marrakech 2002 (October 20-25) which brought together scientists from various countries. These papers cover contemporary topics in multiscale modeling and characterization of materials behavior of engineering materials. They were selected to focus on topics related to deformation and failure in metals, alloys, intermetallics and polymers including: experimental techniques, deformation and failure mechanisms, dislocation-based modelling, microscopic-macroscopic averaging schemes, application to forming processes and to phase transformation, localization and failure phenomena, and computational advances. Key areas that are covered by some of the papers include modeling of material deformation at various scales. At the atomistic scale, results from MD simulations pertaining to deformation mechanisms in nano-crystalline materials as well as dislocation-defect interactions are presented. Advances in modeling of deformation in metals using discrete dislocation analyses are also presented, providing an insight into this emerging scientific technique that can be used to model deformation at the microscale. These papers address current engineering problems, including deformation of thin fIlms, dislocation behavior and strength during nanoindentation, strength in metal matrix composites, dislocation-crack interaction, development of textures in polycrystals, and problems involving twining and shape memory behavior. On Behalf of the organizing committee, I would like to thank Professor P.
Book Synopsis Comprehensive Structural Integrity by : Ian Milne
Download or read book Comprehensive Structural Integrity written by Ian Milne and published by Elsevier. This book was released on 2003-07-25 with total page 4647 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this major reference work is to provide a first point of entry to the literature for the researchers in any field relating to structural integrity in the form of a definitive research/reference tool which links the various sub-disciplines that comprise the whole of structural integrity. Special emphasis will be given to the interaction between mechanics and materials and structural integrity applications. Because of the interdisciplinary and applied nature of the work, it will be of interest to mechanical engineers and materials scientists from both academic and industrial backgrounds including bioengineering, interface engineering and nanotechnology. The scope of this work encompasses, but is not restricted to: fracture mechanics, fatigue, creep, materials, dynamics, environmental degradation, numerical methods, failure mechanisms and damage mechanics, interfacial fracture and nano-technology, structural analysis, surface behaviour and heart valves. The structures under consideration include: pressure vessels and piping, off-shore structures, gas installations and pipelines, chemical plants, aircraft, railways, bridges, plates and shells, electronic circuits, interfaces, nanotechnology, artificial organs, biomaterial prostheses, cast structures, mining... and more. Case studies will form an integral part of the work.
Book Synopsis Experiments and Simulations in Advanced Manufacturing by : Panagiotis Kyratsis
Download or read book Experiments and Simulations in Advanced Manufacturing written by Panagiotis Kyratsis and published by Springer Nature. This book was released on 2021-04-29 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest advances in manufacturing from both the experimental and simulation point of view. It covers most aspects of manufacturing engineering, i.e. theoretical, analytical, computational and experimental studies. Experimental studies on manufacturing processes require funds, time and expensive facilities, while numerical simulations and mathematical models can improve the efficiency of using the research results. It also provides high level of prediction accuracy and the basis for novel research directions.
Book Synopsis Encyclopedia of Tribology by : Q. Jane Wang
Download or read book Encyclopedia of Tribology written by Q. Jane Wang and published by Springer. This book was released on 2013-09-26 with total page 4139 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRIBOLOGY – the study of friction, wear and lubrication – impacts almost every aspect of our daily lives. The Springer Encyclopedia of Tribology is an authoritative and comprehensive reference covering all major aspects of the science and engineering of tribology that are relevant to researchers across all engineering industries and related scientific disciplines. This is the first major reference that brings together the science, engineering and technological aspects of tribology of this breadth and scope in a single work. Developed and written by leading experts in the field, the Springer Encyclopedia of Tribology covers the fundamentals as well as advanced applications across material types, different length and time scales, and encompassing various engineering applications and technologies. Exciting new areas such as nanotribology, tribochemistry and biotribology have also been included. As a six-volume set, the Springer Encyclopedia of Tribology comprises 1630 entries written by authoritative experts in each subject area, under the guidance of an international panel of key researchers from academia, national laboratories and industry. With alphabetically-arranged entries, concept diagrams and cross-linking features, this comprehensive work provides easy access to essential information for both researchers and practicing engineers in the fields of engineering (aerospace, automotive, biomedical, chemical, electrical, and mechanical) as well as materials science, physics, and chemistry.
Book Synopsis Investigation of the Ductile-to-brittle Transition in Single Crystal Body Centered Cubic Metals with 3D Dislocation Dynamics by : Jianming Huang
Download or read book Investigation of the Ductile-to-brittle Transition in Single Crystal Body Centered Cubic Metals with 3D Dislocation Dynamics written by Jianming Huang and published by . This book was released on 2004 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combined Theoretical and Experimental Study of a New Mechanism of Yielding with Application to the Brittle-Ductile Transition by :
Download or read book Combined Theoretical and Experimental Study of a New Mechanism of Yielding with Application to the Brittle-Ductile Transition written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new strain-rate dependent mechanism of dislocation generation that can become active suddenly above a critical temperature has been developed in our research carried out under the present AFOSR support. This mechanism is a thermally driven, stress-assisted cooperative instability of many dislocation loops that leads to an outburst of dislocation activity above the strain-rate dependent critical temperature. The strain-rate dependence originates from the glide of pre-existing and thermally nucleated dislocations below the critical temperature. We have determined theoretically and shown by experiments that the onset of yielding in a crack-free crystal with a very low dislocation content (Si in our study) is remarkably similar to the brittle-to-ductile transition (BDT) in a pre-cracked crystal of the same material. There is significant evidence to show that both processes are controlled by the cooperative process of dislocation generation. As a result, we now have, for the first time, a model that is capable of predicting the brittle-to-ductile-transition-temperature (BDTT) of a material as a function of strain rate and dislocation content.
Book Synopsis The Brittle to Ductile Transition in Silicon by : Robert H. Folk (II.)
Download or read book The Brittle to Ductile Transition in Silicon written by Robert H. Folk (II.) and published by . This book was released on 2000 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 5th International Conference on Industrial Engineering (ICIE 2019) by : Andrey A. Radionov
Download or read book Proceedings of the 5th International Conference on Industrial Engineering (ICIE 2019) written by Andrey A. Radionov and published by Springer Nature. This book was released on 2019-11-14 with total page 1449 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent findings in industrial, manufacturing and mechanical engineering, and provides an overview of the state of the art in these fields, mainly in Russia and Eastern Europe. A broad range of topics and issues in modern engineering are discussed, including the dynamics of machines and working processes, friction, wear and lubrication in machines, surface transport and technological machines, manufacturing engineering of industrial facilities, materials engineering, metallurgy, control systems and their industrial applications, industrial mechatronics, automation and robotics. The book gathers selected papers presented at the 5th International Conference on Industrial Engineering (ICIE), held in Sochi, Russia in March 2019. The authors are experts in various fields of engineering, and all papers have been carefully reviewed. Given its scope, the book will be of interest to a wide readership, including mechanical and production engineers, lecturers in engineering disciplines, and engineering graduates.
