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Rapid solidification process
Topic: Solidification process
32
32
May 25, 2017
05/17
by
Ahmad, N. A.; Wheeler, A. A.; Boettinger, W. J.; McFadden, G. B.
texts
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Topics: Solidification--Mathematical models, Metals--Rapid solidification processing
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25
Mar 28, 2017
03/17
by
Braun, R. J.; McFadden, G. B.; Coriell, S. R.
texts
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Topic: Solidification--Mathematical models
Click here to view the University of Florida catalog record
Topics: Solidification, Crystal growth
39
39
Mar 28, 2017
03/17
by
Wheeler, A. A.; McFadden, G. B.; Boettinger, W. J.
texts
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Topics: Eutectic alloys, Solidification
Click here to view the University of Florida catalog record
Topics: Solidification, Chemical processes
Click here to view the University of Florida catalog record
Topics: Nickel-aluminum alloys, Solidification
[9], 68 leaves : 29 cm
Topics: Solidification, Magnetic fields, Bismuth alloys
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36
Jul 17, 2019
07/19
by
Winegard, W. C
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x, 98 p. :
Topics: Crystal growth, Physical metallurgy, Solidification
[9], 60 leaves : 29 cm
Topics: Aluminum-copper alloys, Solidification, Magnetic fields
http://uf.catalog.fcla.edu/uf.jsp?st=UF004703619&ix=nu&I=0&V=D&pm=1
Topics: Metals--Rapid solidification processing, Magnesium alloys.
The structural solution of such parts in terms of complexity and manufacturing material is diverse. The fittings are lowtech castings, in connection with this, it is necessary to clarify the power features of such cyastings. Austenitic chromiumnickel steel valves castings have stringent tightness requirements. The reason for the violation of the integrity of the castings during operation is most often captured (provided that the porosity does not receive excessive development). As a measure to...
Topics: Steel Flange Valves, Directional Solidification Gradient, Valves Density and Reliability, Valve...
Bell System Technical Journal, 19: 2. April 1940 pp 262-266. Lead-Tin-Arsenic Wiping Solder. (Schumacher, Earle E.; Phipps, G.S.)
Topics: solder, wiping, arsenic, joint, handling, lead, joints, solidification, properties, cent, wiping...
http://uf.catalog.fcla.edu/uf.jsp?st=UF001124700&ix=nu&I=0&V=D
Topics: Bifurcation theory, Crystal growth, Solidification, Crystallization.
225
225
Oct 24, 2015
10/15
by
Engineering
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Aluminium alloy castings are extensively used in general engineering, automotive and aerospace industries due to their excellent castability, machinability and high strength-to-weight ratio. The major problem with aluminium castings is relatively high shrinkage of between 3.5 to 8.5% that occurs during solidification. This study aims to theoretically analyze shrinkage behavior of cast aluminium alloy and to conduct solidification simulation of casting using finite element technique based on the...
Topics: Aluminium, Casting, Shrinkage, Solidification and Simulation.
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27
Jun 22, 2017
06/17
by
Anderson, D. M.; McFadden, G. B.; Wheeler, A. A.
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Topics: Solidification -- Mathematical models, Heat -- Convection -- Mathematical models
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29
May 25, 2017
05/17
by
Anderson, D. M.; McFadden, G. B.; Wheeler, A. A.
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Topics: Solidification--Mathematical models, Heat--Convection--Mathematical models
Sulfur is an element that is intrinsically and sometimes even deliberately present in stainless steel. It is usually bonded in the form of manganese sulfides, which at low levels can have a significant influence on improving machinability. In this work, solidification cracking in austenitic stainless steels welds was investigated. The solidification mode of stainless steels is of fundamental importance and most austenitic stainless steels are designed to solidify to give primary ferrite and...
Topics: Austenitic Stainless Steels, Solidification Mode, Hot Cracking.
In this work an attempt is made to assess the mechanical properties of SG iron by formulating empirical equations to determine the ingot diameter (solidification cooling rate) and vice versa for a given chemical composition. Five samples were produced by taking different ingot diameter to cover wide range of solidification cooling rate. The mechanical properties are noted. It was observed that, the mechanical properties such as Ultimate Tensile Strength and Yield Strength are decreasing as the...
Topics: Solidification Cooling Rate, SG Iron, Mechanical Properties
http://uf.catalog.fcla.edu/uf.jsp?st=UF002099627&ix=pm&I=0&V=D&pm=1
Topics: Crystal growth--Computer simulation, Solidification--Computer simulation.
Design optimization casting emergency stop valve steam turbine, has been done with casting simulation using Magmasoft v5 software. By simulation, some casting design parameters are changed to get more optimal results. Optimization of the design of castings in this study, obtained by improving the design through changes in pouring system using bottom pouring and optimization of riser design. The result of four design casting simulation ESV housing versus filling velocity, solidification, and...
Topics: Design optimization, Casting simulation, Filling Velocity, Solidification, Porosity.
In order to better understanding the effect of shielding gases in the volume fraction of δ ferrite in welded deposits through GMAW, the microstructures of four welded joints of austenitic stainless steel produced by the MIG/MAG process with different shielding gases were studied. The deposits were produced using the same welding electrode ER309Land welding parameters, but different shielding gases from pure argon to mixtures with increasing contents of CO2. Each of the welding deposits were...
Topics: Austenitic Stainless Steels, Solidification Mode, Ferrite Number, GMAW.
6
6.0
Dec 28, 2018
12/18
by
None
texts
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xii, 277 pages : 25 cm
Topics: Heat -- Convection -- Congresses, Solidification -- Congresses, Phase transformations (Statistical...
In the present work, Al-5 wt. %Pb-5 wt.%In and Al-10 wt.%Pb-10 wt.%In were prepared by melt-spun technique. X-ray diffractometer, dynamic resonance method, Vickers hardness indentation and double bridge method were used to characterize the structure, mechanical, Vickers hardness and electrical resistivity of the Al100-x-xPb-xIn (x=5 and 10 wt.%) alloys. Comparing the structure and mechanical properties of melt – spun Al-5Pb-5In with that of Al-10Pb-10In alloy, the effect of indium additions...
Topics: Al-Pb-In Alloy, Mechanical Properties, Hardness, Rapid Solidification
The palm oil exists in several forms: palm oil raw, not refined, of red color because very rich carotenoids, called «red palm oil». In Africa, it is generally sold and consumed rough, i.e. not having undergoes the stages of refining. Taking into account the quantity and relevance of existing work on the palm tree with oil, we limited our study of Elaeis guinensis of Congo Basin to the analysis of the oils taken on the ground of the natural palm plantations and of the plantations of the palm...
Topics: raw palm oils, color, carotene, solidification, polyphenols, Gabon, Congo.
Mendeley Climate Change Library
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45
Jul 6, 2019
07/19
by
P. S. Wei; C. E. Tsai; T. W. Tseng; L. J. Chen; S. B. Wang; W. S. Lo; K. C. Liao
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A transport model is proposed to predict entrapment of a bubble during unidirectional upward solidification. Pore formation and its shape in solid influence not only microstructure of materials, but also contemporary issues of various sciences of biology, engineering, foods, geophysics and climate change, etc. In this study, COMSOL computer code is used to solve conservation equations of mass, momentum, energy and solute concentration in liquid, gas and solid phases satisfied by their...
Topics: Bubble entrapment, Phase field modelling, Pore shape, Solidification, Solute convection
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265
Jun 1, 2011
06/11
by
Dempsey, Paula J.; Mosher, Marianne; Huff, Edward M
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A method for defining thresholds for vibration-based algorithms that provides the minimum number of false alarms while maintaining sensitivity to gear damage was developed. This analysis focused on two vibration based gear damage detection algorithms, FM4 and MSA. This method was developed using vibration data collected during surface fatigue tests performed in a spur gearbox rig. The thresholds were defined based on damage progression during tests with damage. The thresholds false alarm rates...
Topics: MICROGRAVITY, INTERNATIONAL SPACE STATION, POROSITY, SCANNING ELECTRON MICROSCOPY, MORPHOLOGY,...
37
37
Mar 20, 2017
03/17
by
Md. Khalid Hossain
texts
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Iron-based amorphous alloys have attracted technological and scientific interests due to their excellent soft magnetic properties. The typical nanocrystalline alloy with the composition of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 known as FINEMENT has been studied for structural properties analysis. Recently, it is found that after proper annealing the amorphous alloy like Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 has a transition to the nanocrystalline state, thus exhibiting good magnetic properties. The alloy in...
Topics: Fe Based Alloy, Rapid Solidification, Crystallization Behavior, Nanocrystalline Phase Formation.
Simulation results of the formation process of the ceramic fabrications by a hot molding method are presented. Mathematical model describes motion and heat exchange of the liquid thermoplastic slurry of beryllia including the aggregate state change. Velocity and temperature fields during the formation process in the bushings with flat cavity have been obtained. Heat flow distribution at the wall of the form-building cavity is demonstrated. The increase of the slurry density...
Topics: Thermoplastic Slurry, Formation Process, Solidification, ViscousPlastic State, Solid-plastic State
201
201
May 30, 2011
05/11
by
Wang, Ten-See; Chen, Yen-Sen; Liu, Jiwen; Myrabo, Leik N.; Mead, Franklin B., Jr
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A computational plasma aerodynamics model is developed to study the performance of a laser propelled Lightcraft. The computational methodology is based on a time-accurate, three-dimensional, finite-difference, chemically reacting, unstructured grid, pressure-based formulation. The underlying physics are added and tested systematically using a building-block approach. The physics modeled include non-equilibrium thermodynamics, non-equilibrium air-plasma finite-rate kinetics, specular ray...
Topics: SUPERCONDUCTORS (MATERIALS), OXIDES, MICROSTRUCTURE, COPPER OXIDES, SOLIDIFICATION, LIQUIDUS,...
Thermosolutal convection in the dendritic mushy zone occurs during directional solidification of hypoeutectic lead tin alloys in a positive thermal gradient, with the melt on the top and the solid below. This results in macrosegregation along the length of the solidified samples. The extent of macrosegregation increases with increasing primary dendrite spacings for constant mushy zone length. For constant primary spacings, the macrosegregation increases with decreasing mushy zone length....
Topics: NASA Technical Reports Server (NTRS), SOLIDIFICATION, TIN ALLOYS, LEAD ALLOYS, CHEMICAL...
AFU 19700919 APRO Press release on Ubatuba
Topics: extraterrestrial, university, ubatuba, apro, ufo, fragments, materials, lorenzen, solidification,...
490
490
May 23, 2011
05/11
by
Thorpe, Arthur N.; Morris, Vernon R
texts
eye 490
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The Center for the Study of Terrestrial and Extraterrestrial Atmospheres (CSTEA) was established in 1992. The center began with 14 active Principal Investigators (PI's). The research of the Center's PIs has, for the most part, continued in the same four areas as presented in the original proposal: Remote Sensing, Atmospheric Chemistry, Sensors and Detectors, and Spacecraft Dynamics.
Topics: DROP TOWERS, SPACE PROCESSING, NUCLEATION, SOLIDIFICATION, SOLUBILITY, WALLS, TEMPERATURE...
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340
Jul 23, 2010
07/10
by
Mhuiris, Nessan Mac Gioll
texts
eye 340
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Classically it was held that solutions to deterministic partial differential equations (i.e., ones with smooth coefficients and boundary data) could become random only through one mechanism, namely by the activation of more and more of the infinite number of degrees of freedom that are available to such a system. It is only recently that researchers have come to suspect that many infinite dimensional nonlinear systems may in fact possess finite dimensional chaotic attractors. Lyapunov exponents...
Topics: ABSORPTION COOLING, HYDRIDES, LIQUID HYDROGEN, PHASE TRANSFORMATIONS, REFRIGERATORS, LOOPS,...
Efforts have been made to integrate fundamental microscopic behaviour and metallurgical transformations of Grade 304 Austenitic stainless steel during solidification. Incomplete mixing during solidification of Grade 304 steel in weld pool initiates segregation that encourages the dendritic envelope motion regulated by the enlargement of dendrite tips. High segregation of chromium and molybdenum, lead to the formation of secondary ferrite that increases tendency of accumulation of intermetallic...
Topics: Austenitic Stainless Steel, Delta Ferrite, Embrittlement, Hot Cracking, Segregation &...
Simulation results of the formation process of the ceramic fabrications by a hot molding method are presented. Mathematical model describes motion and heat exchange of the liquid thermoplastic slurry of beryllia including the aggregate state change. Velocity and temperature fields during the formation process in the bushings with flat cavity have been obtained. Heat flow distribution at the wall of the form-building cavity is demonstrated. The increase of the slurry density during the...
Topics: Thermoplastic Slurry, Formation Process, Solidification, Viscous-Plastic State, Solid-plastic State
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241
May 23, 2011
05/11
by
Manobianco, John; Nutter, Pau
texts
eye 241
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The Applied Meteorology Unit (AMU) conducted a year-long evaluation of NCEP's 29-km mesoscale Eta (meso-eta) weather prediction model in order to identify added value to forecast operations in support of the United States space program. The evaluation was stratified over warm and cool seasons and considered both objective and subjective verification methodologies. Objective verification results generally indicate that meso-eta model point forecasts at selected stations exhibit minimal error...
Topics: GRAIN SIZE, GRAIN BOUNDARIES, HETEROGENEITY, FRAGMENTATION, CASTINGS, SUBSTRATES, SOLIDIFICATION,...
The Materials Science Laboratory - Columnar-to-Equiaxed Transition in Solidification Processing and Microstructure Formation in Casting of Technical Alloys under Diffusive and Magnetically Controlled Convective Conditions (MSL-CETSOL and MICAST) are two investigations which supports research into metallurgical solidification, semiconductor crystal growth (Bridgman and zone melting), and measurement of thermo-physical properties of materials. This is a cooperative investigation with the European...
Topics: NASA Technical Reports Server (NTRS), DIRECTIONAL SOLIDIFICATION (CRYSTALS), CAST ALLOYS, BRIDGMAN...
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276
Sep 20, 2010
09/10
by
Nandi, S.; Edwards, C. D.; Wu, S. C
texts
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This paper discusses a covariance study on the feasibility of using station-differenced carrier phase on short baselines to track the TDRSS satellites. Orbit accuracies for the TDRSS using station-differenced carrier phase data and range data collected from White Sands, NM are given for various configurations of ground stations and range data precision. A one-sigma-position position accuracy of 25 meters can be achieved using two orthogonal baselines of 100 km for the station-differenced phase...
Topics: CRYSTAL GROWTH, FURNACES, SOLIDIFICATION, SPACE PROCESSING, SPACE STATION FREEDOM, CERAMICS, GLASS,...
Five hypermonotectic Al-In-Sn compositions were directionally solidified in a Bridgman-type furnace at normal gravity and during aircraft low-gravity maneuvers. The tendency of the Al-30In alloy to form an indium-rich band at the start of unidirectional growth (SUG) made it difficult to study the integration of L sub 2 into the solidification interface. Hypermonotectic compositions closer to monotectic slightly hypermonotectic caused only a partial band on L sub 2 to form at SUG and allowed the...
Topics: NASA Technical Reports Server (NTRS), C-135 AIRCRAFT, DIRECTIONAL SOLIDIFICATION (CRYSTALS),...
This grant began in June of 1996. Its long term goal is to be able to control the microstructure of directionally solidified eutectic alloys, through an improved understanding of the influence of convection. The primary objective of the projects in the present grant is to test hypotheses for the reported influence of microgravity on the microstructure of eutectics. The prior experimental results on the influence of microgravity on the microstructure of eutectics have been contradictory. With...
Topics: NASA Technical Reports Server (NTRS), DIRECTIONAL SOLIDIFICATION (CRYSTALS), EUTECTIC ALLOYS,...
An experimental study of the horizontal Bridgman growth of pure succinonitrile (SCN) and of a succinonitrile-1.0 mol% acetone alloy (SCN-1.0 mol.% ACE) has been performed. Experiments involving both a stationary thermal field (no-growth case) and a translating thermal field (growth case) were conducted. Growth rates of 2 and 40 micrometers/sec were investigated. For the pure SCN experiments, the velocity field in the melt was estimated using video images of seed particles in the melt....
Topics: NASA Technical Reports Server (NTRS), DIRECTIONAL SOLIDIFICATION (CRYSTALS), LIQUID-SOLID...
No abstract available
Topics: NASA Technical Reports Server (NTRS), MICROGRAVITY, DIRECTIONAL SOLIDIFICATION (CRYSTALS),...
This paper presents general information describing the Data Acquisition System contract, a summary of objectives, tasks performed and completed. The hardware deliverables which are comprised of: 1) Two ground DAS units; 2) Two flight DAS units; 3) Logistic spares; and 4) Shipping containers are described. Also included are the data requirements and scope of the contract.
Topics: NASA Technical Reports Server (NTRS), DATA ACQUISITION, FURNACES, DIRECTIONAL SOLIDIFICATION...
308
308
Sep 20, 2010
09/10
by
Degroot, Wilhelmus A.; Zupanc, Frank J
texts
eye 308
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Localized velocity, temperature, and species concentration measurements in rocket flow fields are needed to evaluate predictive computational fluid dynamics (CFD) codes and identify causes of poor rocket performance. Velocity, temperature, and total number density information have been successfully extracted from spectrally resolved Rayleigh scattering in the plume of small hydrogen/oxygen rockets. Light from a narrow band laser is scattered from the moving molecules with a Doppler shifted...
Topics: AEROSPACE ENVIRONMENTS, DROP TOWERS, FABRICATION, GROUND TESTS, MICROGRAVITY, SOLIDIFICATION, SPACE...
304
304
May 22, 2011
05/11
by
Royer, Antoin
texts
eye 304
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The Wigner function is argued to be the only natural phase space function evolving classically under quadratic Hamiltonians with time-dependent bilinear part. This is used to understand graphically how certain quadratic time-dependent Hamiltonians induce squeezing of quantum states. The Wigner representation is also used to generalize Ehrenfest's theorem to the quantum uncertainties. This makes it possible to deduce features of the quantum evolution, such as squeezing, from the classical...
Topics: FLUORIDES, GLASS FIBERS, OPTICAL FIBERS, SPACE MANUFACTURING, SPACE PROCESSING, FEASIBILITY,...
The ESD process is comprised of generating an arc through a consumable electrode via capacitive discharge. The electrode and substrate materials are melted, rapidly solidify, and build-up occurs incrementally.
Topics: DTIC Archive, ADVANCED SURFACES AND PROCESSES INC CORNELIUS OR, *ELECTRODEPOSITION, ELECTRODES, GAS...
3,682
3.7K
Jun 21, 2010
06/10
by
NON
texts
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Earth Resources Research Data Facility Index
Topics: CRYSTAL GROWTH, MICROGRAVITY, REACTION KINETICS, SINGLE CRYSTALS, CONFERENCES, MICROGRAVITY...
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350
May 23, 2011
05/11
by
Inomata, Yasushi; Feind, R. E.; Welch, R. M
texts
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A new method based upon high-spatial-resolution imagery is presented that matches cloud and shadow regions to estimate cirrus and stratus cloud heights. The distance between the cloud and the matching shadow pattern is accomplished using the 2D cross-correlation function from which the cloud height is derived. The distance between the matching cloud-shadow patterns is verified manually. The derived heights also are validated through comparison with a temperature-based retrieval of cloud height....
Topics: CRYSTAL GROWTH, ORGANIC MATERIALS, DIRECTIONAL SOLIDIFICATION (CRYSTALS), OPTICAL MATERIALS, SINGLE...
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12
Nov 7, 2018
11/18
by
https://www.flickr.com/photos/gripspix/
movies
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en.wikipedia.org/wiki/Thymol Source: https://www.flickr.com/photos/7374528@N03/6525680513 Uploader: https://www.flickr.com/photos/gripspix/
Topics: Flickr, video, thymol, 2isopropyl5methylphenol, ipmp, crystal, kristall, fp51°c, solidification,...
