Download or read book Modeling of Shrinkage Porosity Defect Formation During Alloy Solidification written by Vahid Khalajzadeh and published by . This book was released on 2018 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The model, called "advanced feeding model", includes 3D multi-phase continuity, momentum and pore growth rate equations which inputs the material properties and transient temperature fields, and outputs the feeding velocity, liquid pressure and porosity distributions in castings. To solve the model equations, a computational code with a finite-volume approach is developed for the flow calculations. To validate the model, predicted results are compared with the experimental data. The comparison results show that the advanced feeding model can accurately predict the occurrence of shrinkage porosity defects in metal castings. Finally, the model is optimized by performing several parametric studies on the model variables.
Download or read book Mathematical Modeling of Microshrinkage Formation During Solidification of A356 Alloy Castings written by Akash H. Patel and published by . This book was released on 2013 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant efforts have been made by materials scientists and metallurgists to understand the underlying physics involved in solidification of aluminum alloys to predict a variety of casting defects. Shrinkage porosity is one of the most important types of casting defects. Addressing porosity has been a formidable challenge due to many contributing (and interacting) phenomena responsible for its formation and growth. Shrinkage porosity occurs by nucleation and growth phenomena. Very few previous models for shrinkage prediction consider the pore formation based on a nucleation and growth basis. Several models that can predict micro shrinkage in castings were revised in detail. The main purpose of this study was to develop a comprehensive model which can predict micro-shrinkage pores that are forming during solidification of A356 castings. The model utilizes a stochastic approach and takes into consideration the Niyama criterion as well as the nucleation potential for formation of pores. Therefore, it can predict the random nature of pore formation during casting solidification. Correlations between the predictions and the pore amount were developed. For this model, literature validation was provided for an A356 alloy plate casting. Further validation was performed for a bar geometry cast in a silica sand mold. The model predictions match reasonably well with the experimental pore distribution profile.
Download or read book Solidification Processing written by Merton C. Flemings and published by McGraw-Hill Companies. This book was released on 1974 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solidification of Aluminum Alloys written by Men G. Chu and published by Wiley-TMS. This book was released on 2004-03 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses progress in the application of solidificationprinciples to the production of aluminum alloys. Topics includemicrostructure evolution, phase formation and solidification pathanalysis, grain refinement, micro/macro-segregation, mechanicalbehavior/properties in the mushy state, solidificationcracking/tearing, gas/shrinkage porosity formation, effect ofimpurities/trace elements, and the impact of cast structure on thesubsequent fabrication and properties of finished products. Paperson the experimental or theoretical simulation of solidificationaspects of casting processes including direct chill casting,continuous casting, shaped casting, semi-solid processing, andother advanced casting technologies are also included, as well asexamples showing the use of solidification principles to solveindustrial problems. From ahref="http://www.tms.org/Meetings/Annual-04/AnnMtg04Home.html"target="_blank"2004 TMS Annual Meeting/a to be held inCharlotte, North Carolina, March 14 - 18, 2004.
Download or read book Casting Processes and Modelling of Metallic Materials written by Zak Abdallah and published by BoD – Books on Demand. This book was released on 2021-02-24 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, Casting Processes and Modelling of Metallic Materials, explores the various casting and modelling activities related to metallic alloy systems. The book provides results of research work conducted by experts from all over the globe to add to the research community in the era of the casting process and modelling. The book was edited by two experts in the field of materials science and modelling, Dr. Abdallah and Dr. Aldoumani, whom both have several publications in peer-reviewed journals, worldwide conferences, and scientific books. The book introduces the casting processes and then discusses the various issues and possible solutions. Over the past years, various models have been proposed and utilized to predict the performance of castings. Some of these models proved to be accurate whereas others failed to predict the casting performance. The strength of any predictive tool depends on the employment of physically meaningful parameters that replicate the real-life conditions. This has been illustrated in the current book with such predictive models and finite element (FE) modelling to illustrate the behaviour of castings in real-life conditions.
Download or read book Modeling for Casting and Solidification Processing written by Kuang-Oscar Yu and published by CRC Press. This book was released on 2001-10-16 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text seeks to provide a comprehensive technical foundation and practical examples for casting process modelling technology. It highlights fundamental theory for solidification and useful applications for industrial production. It also details shape and ingot castings, semi-solid metalworking, and spray forming.
Download or read book Design and Modeling of Mechanical Systems II written by Mnaouar Chouchane and published by Springer. This book was released on 2015-03-24 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a collection of original peer-reviewed contributions presented at the 6th International Congress on Design and Modeling of Mechanical Systems (CMSM’2015), held in Hammamet, Tunisia, from the 23rd to the 25th of March 2015. It reports on both recent research findings and innovative industrial applications in the fields of mechatronics and robotics, dynamics of mechanical systems, fluid structure interaction and vibroacoustics, modeling and analysis of materials and structures, and design and manufacturing of mechanical systems. Since its first edition in 2005, the CMSM Congress has been held every two years with the aim of bringing together specialists from universities and industry to present the state-of-the-art in research and applications, discuss the most recent findings and exchange and develop expertise in the field of design and modeling of mechanical systems. The CMSM Congress is jointly organized by three Tunisian research laboratories: the Mechanical Engineering Laboratory of the National Engineering School of Monastir; the Mechanical Laboratory of Sousse, part of the National Engineering School of Sousse; and the Mechanical, Modeling and Manufacturing Laboratory at the National Engineering School of Sfax.
Download or read book Analysis of Casting Defects written by American Foundrymen's Society and published by . This book was released on 1974 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book helps foundrymen eliminate or minimize inherent casting problems, imrpove casting quality and reduce cleaning and finishing costs.
Download or read book Science and Engineering of Casting Solidification Second Edition written by Doru Michael Stefanescu and published by Springer Science & Business Media. This book was released on 2008-12-03 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stefanescu here attempts to describe solidification theory through the complex mathematical apparatus required for a fundamental treatment of the problem. The mathematics is however restricted to the elements essential to attain a working knowledge in the field. This is in line with the main goal of the book, which is to educate the reader in the fast moving area of computational modeling of solidification of castings. A special effort has been made to introduce the reader to the latest developments in solidification theory including, in this second edition, a new chapter on semi-solid casting.
Download or read book METAL CASTING written by B. RAVI and published by PHI Learning Pvt. Ltd.. This book was released on 2005-01-01 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a scientific approach to metal casting design and analysis supported by software tools. Unlike other books in metal casting focused only on the process know-how, this book uncovers the know-why as well. Besides serving the needs of students of mechanical, production and metallurgical engineering, this book is equally meant to benefit practicing engineers involved or interested in casting development, including product designers, toolmakers, foundry engineers, supply chain managers, engineering consultants, researchers, and software developers. The theory discussed in the book is applicable to all types of castings: ferrous and non-ferrous, produced in sand and metal moulds. By gaining a better understanding of the theory and logic involved through creating, analysing and optimizing virtual castings, the readers will learn how to: Design process-friendly cast products, leading to shorter development time Manufacture assured quality castings, leading to fewer rejections and 'surprises' Manage material and energy utilization, leading to higher yield and lower costs.
Download or read book Science and Engineering of Casting Solidification written by Doru Michael Stefanescu and published by Springer. This book was released on 2015-08-27 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 3rd edition of this popular textbook covers current topics in all areas of casting solidification. Partial differential equations and numerical analysis are used extensively throughout the text, with numerous calculation examples, to help the reader in achieving a working knowledge of computational solidification modeling. The features of this new edition include: • new chapters on semi-solid and metal matrix composites solidification • a significantly extended treatment of multiscale modeling of solidification and its applications to commercial alloys • a survey of new topics such as solidification of multicomponent alloys and molecular dynamic modeling • new theories, including a theory on oxide bi-films in the treatment of shrinkage problems • an in-depth treatment of the theoretical aspects of the solidification of the most important commercial alloys including steel, cast iron, aluminum-silicon eutectics, and superalloys • updated tables of material constants.
Download or read book Modelling of Microporosity Macroporosity and Pipe Shrinkage Formation During the Solidification of Aluminium Alloys Using a Mushy Zone Refinement Method written by Christel Pequet and published by . This book was released on 2002 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnesium Technology 2011 written by Wim Sillekens and published by Springer. This book was released on 2016-12-10 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Magnesium Technology Symposium, which takes place every year at the TMS Annual Meeting & Exhibition, is one of the largest yearly gatherings of magnesium specialists in the world. Papers are presented in all aspects of the field, ranging from primary production to applications to recycling. Moreover, papers explore everything from basic research findings to industrialization. Magnesium Technology 2011 covers a broad spectrum of current topics, including alloys and their properties; cast products and processing; wrought products and processing; forming, joining, and machining; corrosion and surface finishing; ecology; and structural applications. In addition, you'll find coverage of new and emerging applications in such areas as biomedicine and hydrogen storage.
Download or read book Advances in the Science and Engineering of Casting Solidification written by Laurentiu Nastac and published by Springer. This book was released on 2016-12-16 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection encompasses the following four areas: (1) Solidification processing: theoretical and experimental investigations of solidification processes including castings solidification, directional solidification of alloys, electromagnetic stirring, ultrasonic cavitation, mechanical vibration, active cooling and heating, powder bed-electron beam melting additive manufacturing, etc. for processing of metals, polymers and composite materials; (2) Microstructure Evolution: theoretical and experimental studies related to microstructure evolution of materials including prediction of solidification-related defects and particle pushing/engulfment aspects; (3) Novel Casting and Molding Processes: modeling and experimental aspects including high pressure die casting, permanent casting, centrifugal casting, low pressure casting, 3D silica sand mold printing, etc.; and (4) Cast Iron: all aspects related to cast iron characterization, computational and analytical modeling, and processing.
Download or read book Casting Design and Performance written by and published by ASM International. This book was released on 2009 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Solidification written by Wilfried Kurz and published by . This book was released on 1992 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Processing During Casting written by Hasse Fredriksson and published by . This book was released on 2006-05-12 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Casting is one of the most important processes in materials technology. In this unique book, each step in the casting and solidification process is described and models are set up, which in many cases can be approximated by simplified analytical expressions. All casting methods are featured, including component casting, ingot casting and continuous casting. Applications of the results are given in numerous worked examples within the text. Conclusions on how to avoid cracks, solidification pores, slag inclusions and other defects of the castings, can be drawn from the theoretical models. These conclusions are based on research results, which together give an idea of the development in the manufacture of castings. Most chapters conclude with a number of exercises, answers to which are given at the end of the book. The accompanying 'Guide to Exercises', provides the complete solutions to each of the exercises.
