Author: Ravi VijayaraghavanPublisher:
ISBN:
Category :
Languages : en
Pages : 358
Book Description
A Model for Evolution of As-cast Microstructure in Ductile Iron Alloys
Author: Ravi VijayaraghavanModeling and Simulation of Microstructure Evolution in Solidifying Alloys
Author: Laurentiu NastacPublisher: Springer
ISBN: 9781475780192
Category : Technology & Engineering
Languages : en
Pages : 289
Book Description
The aim of Modeling and Simulation of Microstructure Evolution in Solidifying Alloys is to describe in a clear mathematical language the physics of the solidification structure evolution of cast alloys. The concepts and methodologies presented here for the net-shaped casting and the ingot remelt processes can be applied, with some modifications, to model other solidification processes such as welding and deposition processes. Another aim of the book is to provide simulation examples of the solidification structure modeling in some crucial commercial casting technologies as well as to provide practical techniques for controlling the structure formation during the solidification processes.
Advances in the Science and Engineering of Casting Solidification
Author: Laurentiu NastacPublisher: Springer
ISBN: 3319481177
Category : Technology & Engineering
Languages : en
Pages : 419
Book Description
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.
Microstructure Evolution in Ductile Cast Iron Containing Rare Earth Metals : Experiments, Mechanisms and Modelling (Cerium, Lanthanum, Nucleation Site), Dr.Ing., the Norwegian University of Science and Technolkogy, the Institute of Metallurgy, N-7034, Trondheim, Norway
Author: Morten Ingar OnsoienCasting Design and Performance
Author: Publisher: ASM International
ISBN: 1615031324
Category : Science
Languages : en
Pages : 271
Book Description
Modelling of MicrostructuralEvolution in AustemperedDuctile Iron
Author: Duncan Colin PutmanPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Austempered ductile iron (ADI) has a microstructure consisting mainly of high carbon austenite, bainitic ferrite and graphite nodules, produced by a two stage austenitisation and austempering heat treatment. The resulting microstructure gives these materials a combination of high strength and toughness, making them attractive for a wide range of applications. To increase surface hardness, ductile iron alloys can also be cast into chilled moulds to induce carbide formation in the required areas of components. These chilled ductile iron alloys can also be subjected to austenitisation and austempering heat treatments, therefore further improving the mechanical properties of the components core, whilst retaining the hard carbides present in the surface layers. This work encompasses three main areas; two are concerned with the production of generic microstructure models, which work in conjunction with thermodynamic modelling software MTDATA, and one relates to high temperature X-ray diffraction experiments. The first modelling section details how a computer program was developed that can be used to investigate how chemical composition influences the chill tendency of ductile iron alloys. The model predictions were shown to be in good agreement with a wide range of experimental measurements. The second modelling section considers ADI alloys. A computer program was developed which, given the chemical composition and austenitisation and austempering temperatures, produces a prediction of the microstructure of the alloy at the end of stage 1 of the austempering heat treatment, taking into account segregation of alloying elements. Experimental segregation profiles produced during this work showed good agreement with the model predictions. Furthermore, predictions of the stage 1 transformation kinetics as a function of alloying element segregation, are also made by the model. Therefore, the local microstructural transformation times during austempering can be predicted. Good agreement has been observed between phase volume fractions, transformation times and mechanical property predictions made using the model and those found in literature, therefore a useful tool for new alloy development has been produced. High temperature X-ray diffraction experiments were also performed as part of this work. Microstructures typical of ADI alloys were produced during these experiments, although small quantities of pearlite were observed in the samples, and care was taken to minimise any effects of decarburisation and/or oxidation. The austenite carbon content was monitored during austenitisation and austempering, enabling comparisons to be made between high temperature and low temperature X-ray diffraction measurements in ADI alloys.
Microstructure of Ductile Iron
Author: American Foundrymen's SocietyPublisher:
ISBN:
Category : Cast-iron
Languages : en
Pages : 68
Book Description
An Optimization Methodology for Modeling the Solidification of Commercial Gray and White Iron
Author: Anjan Kumar MirleEPD Congress 2013
Author: Michael L. FreePublisher: John Wiley & Sons
ISBN: 1118658418
Category : Technology & Engineering
Languages : en
Pages : 312
Book Description
This state-of-the-art reference presents papers from one of the largest annual gatherings of extraction specialists from around world, the 2013 Annual Meeting of The Minerals, Metals & Materials Society. Addressing many aspects of extraction and processing metallurgy, this volume covers in three sections modeling of multi-scale phenomena in materials processing; production, refining, and recycling of rare earth metals; and solar cell silicon. Essential reading for scientists, engineers, and metallurgists in the global extractive and process metallurgy industries.
Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings
Author: Mariusz HoltzerPublisher: Springer
ISBN: 3319145835
Category : Technology & Engineering
Languages : en
Pages : 166
Book Description
This book provides an overview of the surface effects at the interface boundary of metal/sand moulds, and their influence on the surface quality, microstructure and mechanical and anticorrosive properties of high-quality cast iron. It explores utilitarian aspects of the production of high-quality cast iron castings, including thin-walled castings of high-quality cast iron alloys, and examines problems related to the determination of moulding sands and reclaim quality, and their influence on castings. Presenting new material, this book takes into account the influence of metal quality, pouring temperature, solidification time, the quality of moulding sand with the reclaim application, as well the binders of moulding sands, on the formation of the degenerated graphite near surface layers. It also employs the latest research methods, such as a wavelength-dispersive spectrometer (WDS) analysis and thermodynamic calculations, which were carried out on the reactions occurring in the study area. Providing a valuable resource to academics and researchers interested in materials science, metal casting and metallurgy, this book is also intended for metal industry professionals.