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Experimental Study Of The Mechanisms Of Brittle To Ductile Transition Of Clevage Fracture In Silicon Single Crystals
Download Experimental Study Of The Mechanisms Of Brittle To Ductile Transition Of Clevage Fracture In Silicon Single Crystals full books in PDF, epub, and Kindle. Read online Experimental Study Of The Mechanisms Of Brittle To Ductile Transition Of Clevage Fracture In Silicon Single Crystals ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
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 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 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 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 Belle H. Bennett--leader Among Women by : Mrs. R. W. MacDonell
Download or read book Belle H. Bennett--leader Among Women written by Mrs. R. W. MacDonell and published by . This book was released on 1923 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Advances in Applied Mechanics written by and published by Academic Press. This book was released on 1998-10-29 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly acclaimed series provides survey articles on the present state and future direction of research in important branches of applied mechanics.
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 Theoretical and Applied Mechanics Report by :
Download or read book Theoretical and Applied Mechanics Report written by and published by . This book was released on 1999 with total page 496 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 Issues in General Physics Research: 2011 Edition by :
Download or read book Issues in General Physics Research: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 13957 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in General Physics Research / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about General Physics Research. The editors have built Issues in General Physics Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about General Physics Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in General Physics Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
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 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 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 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 1989 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SiC based Miniaturized Devices by : Stephen Edward Saddow
Download or read book SiC based Miniaturized Devices written by Stephen Edward Saddow and published by MDPI. This book was released on 2020-06-18 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: MEMS devices are found in many of today’s electronic devices and systems, from air-bag sensors in cars to smart phones, embedded systems, etc. Increasingly, the reduction in dimensions has led to nanometer-scale devices, called NEMS. The plethora of applications on the commercial market speaks for itself, and especially for the highly precise manufacturing of silicon-based MEMS and NEMS. While this is a tremendous achievement, silicon as a material has some drawbacks, mainly in the area of mechanical fatigue and thermal properties. Silicon carbide (SiC), a well-known wide-bandgap semiconductor whose adoption in commercial products is experiening exponential growth, especially in the power electronics arena. While SiC MEMS have been around for decades, in this Special Issue we seek to capture both an overview of the devices that have been demonstrated to date, as well as bring new technologies and progress in the MEMS processing area to the forefront. Thus, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on: (1) novel designs, fabrication, control, and modeling of SiC MEMS and NEMS based on all kinds of actuation mechanisms; and (2) new developments in applying SiC MEMS and NEMS in consumer electronics, optical communications, industry, medicine, agriculture, space, and defense.
