Download or read book Modelling of Rapid Solidification and Microstructure of Rapidly Solidified Copper Alloys written by Xuezhi Zhang and published by . This book was released on 1993 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rapid Solidification Technology written by T.S. Sudarshan and published by CRC Press. This book was released on 1993-12-20 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid solidification processing results in increased strength, and fracture and fatigue resistance of alloys, with concurrent improvements in mechanical, physical and chemical properties. This volume provides a systematic examination of this technology, including metallurgical aspects, processing methods, alloy design, and applications. Each chapter was prepared by a specialist for this volume. The text is well illustrated with more than 400 micrographs and schematics. More than 75 tables provide important reference data.

Download or read book Rapid Solidification of Metals and Alloys written by Howard Jones and published by Ashgate Publishing. This book was released on 1983 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elements of Rapid Solidification written by Monde A. Otooni and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elements of Rapid Solidification: Fundamentals and Applications is the product of many years of concentrated work in the field of rapid solidification and processing. This quasi-monograph is unique in two ways. It brings together the talent of many international scientists in an effort to focus attention on all aspects of a new scientific field and it concentrates on fundamentals and practical applications. Simply stated, this book has been written by the senior students in the field of rapid solidification technology for the new generation of solid-state physicists, materials scientists, materials engineers, metallurgists and ceramicists.

Download or read book Quantitative Phase Field Modelling of Solidification written by Nikolas Provatas and published by CRC Press. This book was released on 2021-10-12 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a study of phase field modelling of solidification in metal alloy systems. It is divided in two main themes. The first half discusses several classes of quantitative multi-order parameter phase field models for multi-component alloy solidification. These are derived in grand potential ensemble, thus tracking solidification in alloys through the evolution of the chemical potentials of solute species rather than the more commonly used solute concentrations. The use of matched asymptotic analysis for making phase field models quantitative is also discussed at length, and derived in detail in order to make this somewhat abstract topic accessible to students. The second half of the book studies the application of phase field modelling to rapid solidification where solute trapping and interface undercooling follow highly non-equilibrium conditions. In this limit, matched asymptotic analysis is used to map phase field evolution equations onto the continuous growth model, which is generally accepted as a sharp-interface description of solidification at rapid solidification rates. This book will be of interest to graduate students and researchers in materials science and materials engineering. Key Features Presents a clear path to develop quantitative multi-phase and multi-component phase field models for solidification and other phase transformation kinetics Derives and discusses the quantitative nature of the model formulations through matched interface asymptotic analysis Explores a framework for quantitative treatment of rapid solidification to control solute trapping and solute drag dynamics

Download or read book Rapidly Quenched Metals written by S Steeb and published by Elsevier. This book was released on 2012-12-02 with total page 1163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapidly Quenched Metals, Volume I covers the proceedings of the Fifth International Conference on Rapidly Quenched Metals, held in Wurzburg, Germany on September 3-7, 1984. The book focuses on amorphous and crystalline metals formed by rapid quenching from the melt. The selection first covers the scope and trends of developments in rapid solidification technology, rapid solidification, and undercooling of liquid metals by rapid quenching. Discussions focus on experimental method, powders, strip, particulate production, consolidation, and alloys and alloy systems. The text then examines the solidification of undercooled liquid alloys entrapped in solid; crystallization kinetics in undercooled droplets; and grain refinement in bulk undercooled alloys. The manuscript tackles the undercooling of niobium-germanium alloys in a 100 meter drop tube; influence of process parameters on the cooling rate of the meltspinning process; and the mechanism of ribbon formation in melt-spun copper and copper-zirconium. The formation and structure of thick sections of rapidly-solidified material by incremental deposition and production of ultrafine dispersions of rare earth oxides in Ti alloys using rapid solidification are also mentioned. The selection is a valuable reference for physicists, chemists, physical metallurgists, and engineers.

Download or read book Rapidly Solidified Metals written by T.R. Anantharaman and published by Trans Tech Publications Ltd. This book was released on 1987-01-01 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapidly Solidified Metals constitute today a rapidly multiplying species of metallic materials with excellent combinations of properties that make them attractive alternatives and often serious competitors to conventional alloys in diverse industrial applications.

Download or read book Characterization of Rapidly Solidified Alloys written by D. Shechtman and published by . This book was released on 1982 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: The Microstructure of Rapidly Solidified NiAl-Cr Quasibinary Eutectic; Microstructural Studies on Supercooled Submicrometer size Particles; Nondestructive Phases in Rapidly Solidified Aluminum-Rich Al-Fe alloys, and The Effect of Rapid Solidification Velocity on the Microstructure of Ag-Cu Alloys.

Download or read book Modeling and Simulation of Microstructure Evolution in Solidifying Alloys written by Laurentiu Nastac and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Rapid Solidification of an Aluminum lithium Alloy for Solid Freeform Fabrication Applications written by David Heard and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The solidification behavior of an Aluminum-Lithium-Copper (Al-Li-Cu) alloy, AA2199, and the microstructural morphology and solute distributions resulting from three rapid solidification processing techniques were investigated. Controlled-Short-Circuiting Metal-Inert-Gas (CSC-MIG) welding, Laser Re-melting (LRM), and Electrospark Deposition (ESD) were investigated. The morphology of the rapidly solidified material was then compared with the Kurz-Giovanola-Trivedi (KGT) model for microstructural development during rapid solidification, to allow for the estimation of the solidification front velocity (SFV) realized during processing. This SFV was then compared with that required for non-equilibrium solute partitioning as predicted by the Continuous Growth Model (CGM) of Aziz. The solute distributions where then measured and compared with that expected for equilibrium and non-equilibrium partitioning, to determine if the solute trapping phenomenon had been induced during solidification. The CSC-MIG deposited material displayed a fine (4.3 ±1 [micrometer]) cellular structure, comparable to that reported for electron beam welding. The SFV was estimated to be ~2-4.5x10-4m/s, a value below that required to impart any deviation from equilibrium partitioning. Chemical analysis via Energy Dispersive Spectroscopy (EDS) and Time-Of-Flight Secondary-Ion-Mass-Spectroscopy (TOF-SIMS) revealed lateral segregation of copper to the cell walls, and a similar segregation profile to that predicted by the Clyne-Kurz model. TOF-SIMS also revealed a homogeneous lateral lithium distribution, while depth profiling displayed some lithium enrichment at the surface.Within the LRM material it was determined that laser pulse energies on the order of 0.25-0.5 Joules resulted in a fine cellular solidification structure. The SFV was estimated to be between 3 and 25cm/s were realized during solidification. Furthermore, a pulse energy of 0.125J resulted in a featureless solidification structure. The SFV for the samples produced with a pulse energy of 0.125J was estimated to be >1m/s. The CGM predicted a deviation from equilibrium partitioning all pulse energy levels employed. This was supported by the chemical profiling of lithium within the re-melted samples measured via X-ray photoelectron spectroscopy (XPS). Measurement of the lattice parameter via X-ray diffraction (XRD) revealed that the solute trapping phenomenon resulted in the formation of a super saturated solid solution, evident through a reduction of the lattice parameter from 4.0485 Å for the starting material to 4.0399 Å in the LRM material produced with a pulse energy of 0.125 Joules. The analysis of the ESD solidified material revealed the breakdown of a planar solid-liquid interface into a cellular morphology, resulting in fine copper rich cells within the microstructure (~30-60nm in width). The KGT model predicted this occurred at a SFV of ~1m/s. The CGM predicted significant trapping of Li at a SFV of 1m/s, which was supported by the TOF-SIMS data, which revealed a homogeneous distribution of lithium within the solidified material. Finally Atom-Probe-Tomography revealed the presence of Al3Li upon the cell walls. It was then determined that the Al3Li was not formed during the solidification process, as predicted by a time dependent nucleation model for phase suppression during rapid solidification, and the result of subsequent aging. It was also revealed that the T1 hardness of the LRM material is similar to that of the T3 BM. It was therefore concluded that the LRM process is capable of producing SFF components of AA2199, which can achieve adequate hardness via a natural aging process, without requiring cold-working prior to aging. Finally the LRM solidified material in the T5 condition was determined to be capable of aging to 81% of the hardness (~122HV) of the BM in the T8' condition, without the application of a cold working process prior to aging." --

Download or read book International Journal of Rapid Solidification written by and published by . This book was released on 1995 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Microstructure and Properties of Rapidly Solidified and Consolidated Age Hardening Copper Alloys written by José de Brito Correia and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metastable Microstructures written by Dipankar Banerjee and published by . This book was released on 1993 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rapid Solidification Processing of Titanium copper Alloys Containing Rare Earth Additions written by Mark Anthony Ohls and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid solidification (RS) studies have been performed on various Ti-Cu (2-10 wt.%) alloys with and without 2.5 wt.% Er additions. Rapid solidification was effected by laser surface melting and/or centrifugal atomization. Prior to RS, careful characterization of the starting (arc-melted) materials was performed. Macrostructures of arc-melted buttons consisted of a 'classical' chill zone at the bottom, a columnar region in the middle and an equiaxed zone at the top. Microstructures of arc-melted hypoeutectoid binary Ti-Cu alloys consisted primarily of proeutectoid $alpha$-Ti, which formed as overlapping plates (crisscross structure). Eutectoid was present between the plates. Microstructures of hypereutectoid alloys were almost entirely eutectoid ($alpha$-Ti + Ti$sb2$Cu). Microstructures of laser treated binary Ti-Cu alloys consisted entirely of martensitic $alphaspprime$-Ti. Microstructures of laser treated Ti-Cu-Er alloys consisted of a supersatured solid solution of Cu, Er and O in $alphaspprime$-Ti together with discrete, globular particles. It was shown by analytical electron microscopy that the particles contained Er, O and a trace of Cu. Erbia (Er$sb2$O$sb3$) and $alphaspprime$-Ti were identified by x-ray diffraction analysis. A mechanism for the formation of the microstructure was related to a metastable liquid miscibility gap in the binary Ti-Er system. Centrifugally atomized Ti-10Cu and Ti-10Cu-2.5Er alloys were found to consist of a supersaturated solution of Cu, Er (and oxygen) in $alphaspprime$-Ti and $beta$-Ti. There were few second phase particles present in thin foils of Ti-10Cu-2.5Er powder indicating that no apparent liquid phase separation or extensive segregation occurred. It was shown quantitatively that the true fine particle density was significantly higher in finer powders. Consolidation of the centrifugally atomized powders by hot isostatic pressing produced a microstructure with a fine (diameter $sim$2 $mu$m) grain size. The Ti-10Cu-2.5Er alloy exhibited a less refined dispersion of erbia. It was concluded that the coarse dispersion of erbia did not contribute to alloy strengthening. The 0.2% yield strengths of the HIP$spprime$ed Ti-10Cu-2.5Er alloys were significantly higher than those of an annealed Ti-10Cu alloy. This is attributed to the fine grain size in the consolidated materials. (Abstract shortened with permission of author.)

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 Application of Solidification Theory to Rapid Solidification Processing written by and published by . This book was released on 1984 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid solidification allows the production of alloys with new compositions and phases and also allows production of improved alloys by control of microstructures and homogeneity. The effect of rapid solidification velocity on the micro-structure of Ag-Cu alloys is comprehensively described, mechanisms of microsegregation-free solidification are reviewed, and microstructure and phase solubility extension in rapidly solidified NiCr-Al quasibinary eutectic alloys are discussed in papers prepared for publication. (Author).

Download or read book Fundamentals of Aluminium Metallurgy written by Roger Lumley and published by Woodhead Publishing. This book was released on 2018-05-22 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Aluminium Metallurgy: Recent Advances updates the very successful book Fundamentals of Aluminium Metallurgy. As the technologies related to casting and forming of aluminum components are rapidly improving, with new technologies generating alternative manufacturing methods that improve competitiveness, this book is a timely resource. Sections provide an overview of recent research breakthroughs, methods and techniques of advanced manufacture, including additive manufacturing and 3D printing, a comprehensive discussion of the status of metalcasting technologies, including sand casting, permanent mold casting, pressure diecastings and investment casting, and recent information on advanced wrought alloy development, including automotive bodysheet materials, amorphous glassy materials, and more. Target readership for the book includes PhD students and academics, the casting industry, and those interested in new industrial opportunities and advanced products. Includes detailed and specific information on the processing of aluminum alloys, including additive manufacturing and advanced casting techniques Written for a broad ranging readership, from academics, to those in the industry who need to know about the latest techniques for working with aluminum Comprehensive, up-to-date coverage, with the most recent advances in the industry