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Relevant bibliographies by topics / Alloy nucleation study][Lead nucleation

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Academic literature on the topic 'Alloy nucleation study][Lead nucleation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Alloy nucleation study][Lead nucleation"

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Libera, Matthew R. "AEM analysis of solidification catalysts in atomized Fe-Ni." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 584–85. http://dx.doi.org/10.1017/s0424820100144395.

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The liquid droplets produced by atomization processes are believed to undergo substantial supercooling during solidification, because the catalytic heterogeneities, for statistical reasons, tend to be isolated in the larger droplets. This supercooling can lead to the nucleation of metastable phases. As part of a study on the effect of liquid supercooling on nonequilibrium solidification, three binary Fe-Ni alloys have been produced by conventional argon atomization (Fe-20Ni, Fe-30Ni, and Fe-40Ni). The primary variables in these experiments are: i) the alloy composition; and ii) the powder part

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Wang, Zhi Gang, Jun Xu, Bao Li, and Zhi Feng Zhang. "Study on Refinement Mechanism of Sc and Zr as-Cast Al-7.2Zn-2.2Mg-1.8Cu Alloys." Applied Mechanics and Materials 372 (August 2013): 66–69. http://dx.doi.org/10.4028/www.scientific.net/amm.372.66.

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The effect of trace Sc and Zr on grain refinement of Al-7.2Zn-2.2Mg-1.8Cu as-cast ingot was studied by using optical microscopy and scanning electron microscopy with EDS. The results show that addition of only 0.20% Zr or 0. 20% Sc to Al-7.2Zn-2.2Mg-1.8Cu alloy can refine grains to a certain degree, and the addition of 0.10% Sc+0.20%Zr leads to stronger grain refinement, the average grain size is only 10-15μm. Al3Sc/Al3Zr composite particles in the melt work as the nucleation of heterogeneous nucleation during solidification.

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Kooi, Bart J., R. Pandian, J. Th M. De Hosson, and Andrew Pauza. "In situ Transmission Electron Microscopy Study of the Crystallization of Fast-growth Doped SbxTe Alloy Films." Journal of Materials Research 20, no. 7 (2005): 1825–35. http://dx.doi.org/10.1557/jmr.2005.0228.

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Crystallization of amorphous thin films composed of doped SbxTe with x = 3.0, 3.6, and 4.2 and constant dopant level was studied by in situ heating in a transmission electron microscopy. Magnetron sputtering was used to deposit 20-nm-thick films sandwiched between two types of 3-nm-thick dielectric layers on 25-nm-thick silicon-nitride membranes. One type of dielectric layer consists of ZnS–SiO2 (ZSO), the other of GeCrN (GCN). Crystallization was studied for temperatures in-between 150 and 190 °C. The type of dielectric layer turned out to strongly influence the crystallization process. Not o

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Liu, Han Min, Jie Cheng, Yue Hua Wen, Jun Li Pan, and Gao Ping Cao. "Study of Substrate for the Zinc Electrode in Acid Zn-PbO₂ Flow Battery." Applied Mechanics and Materials 700 (December 2014): 136–40. http://dx.doi.org/10.4028/www.scientific.net/amm.700.136.

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An investigation into the suitability of carbon materials, metallic lead and its alloys as substrates for the zinc electrode in acid Zn-PbO2 flow batteries was performed. No maximum current appears on the potentiostatic current transients recorded for the zinc deposition on the lead and its alloys. With increasing the overpotential, the progressive nucleation turns to be the 3D-instantaneous nucleation process employed for the resin-graphite composite. Hydrogen evolution on the graphite composite is effectively suppressed due to the doping of polymer resins. The rate of hydrogen evolution reac

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Hashim, Aimi Noorliyana, Mohd Arif Anuar Mohd Salleh, Andrei Victor Sandu, et al. "Effect of Ni on the Suppression of Sn Whisker Formation in Sn-0.7Cu Solder Joint." Materials 14, no. 4 (2021): 738. http://dx.doi.org/10.3390/ma14040738.

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The evolution of internal compressive stress from the intermetallic compound (IMC) Cu6Sn5 growth is commonly acknowledged as the key inducement initiating the nucleation and growth of tin (Sn) whisker. This study investigates the effect of Sn-0.7Cu-0.05Ni on the nucleation and growth of Sn whisker under continuous mechanical stress induced. The Sn-0.7Cu-0.05Ni solder joint has a noticeable effect of suppression by diminishing the susceptibility of nucleation and growth of Sn whisker. By using a synchrotron micro X-ray fluorescence (µ-XRF) spectroscopy, it was found that a small amount of Ni al

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Wu, Di, and Zhuang Li. "Study on the Machinability of Free Cutting Non-Lead Austenitic Stainless Steels." Advanced Materials Research 430-432 (January 2012): 306–9. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.306.

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In this paper, a new non-lead machinable austenitic stainless steel was investigated. The metallurgical properties, machinability and mechanical properties of the developed alloy were compared with those of the conventional austenitic stainless steel 321. The results have shown that the presence of machinable additives, such as sulfur, copper and bismuth, etc. contributes to the improvement of the machinability of austenitic stainless steel, because the inclusions are something like internal notches causing crack nucleation and facilitating rupture. Bismuth has a distinct advantage over lead.

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Zhang, Jiao, Qing Dong, Yong Bing Dai, Bao De Sun, and Hong Lan Xie. "Study of Fragment Behavior during Columnar-Equiaxed Transition of Hypoeutectic Alloy with Synchrotron Radiation." Materials Science Forum 706-709 (January 2012): 1743–48. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1743.

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In the present work, solidification of hypoeutectic, eutectic and hypereutectic Al-Cu alloys was illustrated by synchrotron X ray imaging, and the CET of hypoeutectic alloy was picked out to thorough investigated. The mechanism of hypoeutectic dendrites fragment behaviors among the nucleation area was studied by in-situ imaging and first-principles computation. The results show that the density difference between the fragments and the enriched melt leads to the movement of the fragments. The ejected fragments contributed to the columnar-eutectic transition and expanded the breadth of mush zone

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Sak-Saracino, Emilia, та Herbert M. Urbassek. "The α↔γ transformation of an Fe1−xCrx alloy: A molecular-dynamics approach". International Journal of Modern Physics C 27, № 10 (2016): 1650124. http://dx.doi.org/10.1142/s0129183116501242.

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Using molecular dynamics (MD) simulation, we study the temperature-induced [Formula: see text] phase transformation of an Fe[Formula: see text]Cr[Formula: see text] alloy. We find that the austenitic transition temperature is increased with respect to that of an Fe[Formula: see text]Ni[Formula: see text] alloy containing the same concentration of impurity atoms. During the austenitic transformation, heterogeneous nucleation of close-packed (cp) nuclei leads to a polycrystalline structure. The microstructure formed closely resembles that found in pure Fe and in FeNi alloys.

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HACIOGLU, TUGCE, AYSEN TEZCANER, SHERIF ABBAS, and ZAFER EVIS. "PREPARATION AND CHARACTERISTICS OF CO-DOPED HYDROXYAPATITE BIOMIMETIC COATINGS ON PRETREATED Ti6Al4V ALLOY." Surface Review and Letters 27, no. 11 (2020): 2050012. http://dx.doi.org/10.1142/s0218625x20500122.

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In this study, [Formula: see text] co-doped and pure hydroxyapatites (HAp) were coated on rough surfaces of Ti6Al4V plates by biomimetic method. Prepared samples were investigated with SEM, EDS, FTIR, XRD and ICP. Furthermore, mechanical scratch tests, profilometer tests and in vitro cell studies were carried out. In order to explore the antibacterial characteristics of the coating, the survival rate of a bacteria named Staphylococcus epidermidis was determined. Structural investigations showed that HAp nucleation began four days after the immersion, expectedly nucleation developed collaterall

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Michal, G. M., T. K. Glasgow, and T. J. Moore. "Spherulite Structures in a Melt Spun Fe-Ni Austenitic Steel." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 52–53. http://dx.doi.org/10.1017/s0424820100117339.

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Large additions of B to Fe-Ni alloys can lead to the formation of an amorphous structure, if the alloy is rapidly cooled from the liquid state to room temperature. Isothermal aging of such structures at elevated temperatures causes crystallization to occur. Commonly such crystallization pro ceeds by the nucleation and growth of spherulites which are spherical crystalline bodies of radiating crystal fibers. Spherulite features were found in the present study in a rapidly solidified alloy that was fully crysstalline as-cast. This alloy was part of a program to develop an austenitic steel for ele

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Dissertations / Theses on the topic "Alloy nucleation study][Lead nucleation"

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Moore, K. I. "Heterogeneous nucleation of solidification in an Al-Pb alloy." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376935.

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Young, Adam Hamilton. "Study of the Nucleation Mechanism of a-Ti in Bimodal and Fully Lamellar Microstructures Developed in the High-Strength, Near-Beta Titanium Alloy, TIMETAL®18." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374159274.

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Desnain, Philippe. "Influence de la convection sur la taille de grains de solidification d'alliages industriels d'aluminium." Grenoble INPG, 1989. https://hal.archives-ouvertes.fr/tel-01338778.

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Etude de la formation de la structure de grains lors de la solidification d'alliages industriels d'aluminium. Enregistrement des courbes de refroidissement et examen des phenomenes de recalescence lors de la solidification dans une lingotiere rectangulaire verticale munie d'un brasseur electromangetiques a champ glissant. Caracterisation des lingots et mesures de la taille des grains equiaxes. Modelisation de la nucleation et de la croissance des cristaux equiaxes. Influence du brassage et de la composition. Prevision a partir du modele etabli de l'affinement des grains resultant du brassage

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Book chapters on the topic "Alloy nucleation study][Lead nucleation"

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Wang, Yunkai, and Jianzhong Li. "Study of the Effect of the Initial Nucleation Mechanism of Lead Anode Oxidation Film on Internal Stress in Chromic Acid Electrolyte." In Characterization of Minerals, Metals, and Materials 2017. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51382-9_56.

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Zolnikov, Konstantin P., Dmitrij S. Kryzhevich, and Aleksandr V. Korchuganov. "Regularities of Structural Rearrangements in Single- and Bicrystals Near the Contact Zone." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_14.

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AbstractThe chapter is devoted to the analysis of the features of local structural rearrangementsin nanostructured materialsunder shear loadingand nanoindentation. The study was carried out using molecular dynamics-based computer simulation. In particular, we investigated the features of symmetric tilt grain boundary migration in bcc and fcc metals under shear loading. The main emphasis was on identifying atomic mechanisms responsible for the migration of symmetric tilt grain boundaries. We revealed that grain boundaries of this type can move with abnormally high velocities up to several hundred meters per second. The grain boundary velocity depends on the shear rate and grain boundary structure. It is important to note that the migration of grain boundary does not lead to the formation of structural defects. We showed that grain boundary moves in a pronounced jump-like manner as a result of a certain sequence of self-consistent displacements of grain boundary atomic planes and adjacent planes. The number of atomic planes involved in the migration process depends on the structure of the grain boundary. In the case of bcc vanadium, five planes participate in the migration of the Σ5(210)[001] grain boundary, and three planes determine the Σ5(310)[001] grain boundary motion. The Σ5(310)[001] grain boundary in fcc nickel moves as a result of rearrangements of six atomic planes. The stacking order of atomic planes participating in the grain boundary migration can change. A jump-like manner of grain boundary motion may be divided into two stages. The first stage is a long time interval of stress increase during shear loading. The grain boundary is motionless during this period and accumulates elastic strain energy. This is followed by the stage of jump-like grain boundary motion, which results in rapid stress drop. The related study was focused on understanding the atomic rearrangements responsible for the nucleation of plasticity near different crystallographic surfaces of fcc and bcc metals under nanoindentation. We showed that a wedge-shaped region, which consists of atoms with a changed symmetry of the nearest environment, is formed under the indentation of the (001) surface of the copper crystallite. Stacking faults arise in the (111) atomic planes of the contact zone under the indentation of the (011) surface. Their escape on the side free surface leads to a step formation. Indentation of the (111) surface is accompanied by nucleation of partial dislocations in the contact zone subsequent formation of nanotwins. The results of the nanoindentation of bcc iron bicrystal show that the grain boundary prevents the propagation of structural defects nucleated in the contact zone into the neighboring grain.

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Ohtsuka, H., and G. B. Olson. "Quantitative study on the density of nucleation sites of martensite in an Fe-Pt alloy." In Ecomaterials. Elsevier, 1994. http://dx.doi.org/10.1016/b978-1-4832-8381-4.50230-4.

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Conference papers on the topic "Alloy nucleation study][Lead nucleation"

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Bhavsar, Vaibhav N., Jyoti Shankar Jha, Ghanshyamsinh Jhala, Alphonsa Joseph, Sushil Mishra, and Asim Tewari. "Characterization of Ti-6Al-4V Alloy Modified by Plasma Nitriding Process." In ASME 2017 Gas Turbine India Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gtindia2017-4855.

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Titanium alloys are gaining widespread acceptance in aerospace industry because of its high specific strength, corrosion resistance and good fatigue properties. Dovetails of the compressor blades, gears, splines etc. are some aerospace components that fail through premature fatigue crack initiation and propagation under the action of wear, fatigue and fretting fatigue. The fretting failure originates from the surface or near surface and leads to the damage of the components. Therefore the surface of components can be modified to improve the tribological performance by plasma nitriding which im

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Şişman, Yağmur, Abdolali Khalili Sadaghiani, Khedir R. Khedir, Tansel Karabacak, and Ali Koşar. "Nucleate Boiling Heat Transfer Enhancement Using Nanostructured Al-Alloy Plates." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6582.

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Bubble departure frequency and active nucleation site density are two main factors that affect the nucleate boiling heat transfer. The potential enhancement of boiling heat transfer can be accomplished by surface modification. This treatment can be realized with changing parameters such as porosity, tilting angle and cavity radius. In this study, effects of different nanostructured Aluminum-Alloy (Al-Alloy) 2024 sheets on subcooled boiling heat transfer are investigated. A simple and environmentally friendly technique is used in order to produce these plates that are immersed into boiling deio

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Yao, Yao, Jared Fry, Morris Fine, and Leon Keer. "Numerical Analysis to Lead Free Solder/Intermetallic Interconnect With Application of Wiedemann-Franz-Lorenz Relation." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88634.

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Due to the limitation of available experimental data for thermal conductivity of lead free solder and Intermetallic Compound (IMC) materials, the Wiedemann-Franz-Lorenz (WFL) relation is presented in this paper as a possible solution to predict thermal conductivity with known electrical conductivity. The method is based upon the fact that heat and electrical transport both involve the free electrons. The thermal and electrical conductivities of Cu, Ni, Sn, and different Sn rich lead free solder and IMC materials are studied by employing the WFL relation. Generally, the analysis to the experime

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Sa, Rongyuan, and Minoru Takahashi. "Thermal Interaction of Lead-Alloy Droplet With Subcooled Water in Pool Water Tank." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29621.

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Visualization test was conducted by designing and setting up a special experimental apparatus to investigate characteristics of thermal-hydraulic interaction between lead-alloy droplet and subcooled water in pool water tank. The violent boiling phenomena were observed by a high-speed camera and local transient pressure was measured by high frequency piezo pressure transducer. The results showed that violent boiling mainly occurred when interface temperature between droplet and water was higher than homogenous nucleation temperature of water and subcooling temperature of water was higher than 4

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Yadav, Shwetabh, and Dinakar Sagapuram. "Nucleation and Boundary Layer Growth of Shear Bands in Machining." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-3022.

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Abstract An experimental study of shear band formation in cutting of metals is made using a low melting point Bi-based alloy as a model material system. High-speed imaging is used to capture the transition in the plastic flow, from laminar to shear banded flow, as a function of cutting speed. The dynamics of shear band nucleation is captured in situ and temporal evolution of localized plastic flow during shear band growth is quantitatively analyzed using an image correlation method, particle image velocimetry (PIV). The observations show that shear band nucleation is governed by a critical she

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Zoeller, Tracie L., and Thomas H. Sanders. "The Effect of Thermal Treatment on the Microstructural Evolution of an Al-Cu Alloy." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47149.

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Following solidification, an aluminum alloy microstructure is highly segregated. The microstructure consists of cored dendrites with various soluble and insoluble phases present in the dendritic regions. The solidification rate has a marked effect on the amount of coring that an alloy experiences. Understanding the effects of the solidification rate is important in explaining differences in microstructures. Subsequent heat treatments are performed to homogenize the microstructure. The microstructure evolution after each processing step is dependent upon the previous microstructures. The variat

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Butcher, Cliff, and Zengtao Chen. "A Coupled-Constitutive Model for Ductile Fracture: Void Nucleation to Coalescence." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39229.

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A novel framework and integration scheme has been developed to implement a secant-based homogenization theory for particle-reinforced plasticity into an existing damage-based constitutive model, the well known Gurson-Tvergaard (GT) model. In this approach, the material is treated as a three-phase composite composed of voids and particles embedded in a ductile matrix. Two successive homogenization theories (damage- and particle-based) are then applied to determine the macro-mechanical response of the material as well as the average stress state within the constituents as a function of the parti

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Yenusah, Caleb O., Yanzhou Ji, Yucheng Liu, Tonya W. Stone, Mark F. Horstemeyer та Lei Chen. "Investigating the Precipitation Kinetics and Hardening Effects of γ” in Inconel 625 Using a Combination of Meso-Scale Phase-Field Simulations and Macro-Scale Precipitate Strengthening Calculations". У ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23328.

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Abstract Precipitation strengthening of alloys by the formation of secondary particles (precipitates) in the matrix is one of the techniques used for increasing the mechanical strength of metals. Understanding the precipitation kinetics such as nucleation, growth, and coarsening of these precipitates is critical for evaluating their hardening effects and improving the yield strength of the alloy during heat treatment. To optimize the heat treatment strategy and accelerate alloy design, predicting precipitate hardening effects via numerical methods is a promising complement to trial-and-error-b

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Mo, Kun, Wei Lv, Hsiao-Ming Tung, Di Yun, Yinbin Miao, and James F. Stubbins. "Biaxial Thermal Creep of Alloy 617 and Alloy 230 for VHTR Applications." In ASME 2014 Symposium on Elevated Temperature Application of Materials for Fossil, Nuclear, and Petrochemical Industries. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/etam2014-1002.

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In this study, we employed pressurized creep tubes to investigate the biaxial thermal creep behavior of Inconel 617 (Alloy 617) and Haynes 230 (Alloy 230). Both alloys have been considered to be the primary candidate structural materials for very high temperature reactors (VHTRs) due to their exceptional high-temperature mechanical properties. The current creep experiments were conducted at 900°C for the effective stress range of 15–35 MPa. For both alloys, complete creep strain development with primary, secondary, and tertiary regimes were observed in all studied conditions. The tertiary cree

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Shekriladze, Irakli G., Giorgi I. Gigineishvili, Jondo G. Rusishvili, and David I. Shekriladze. "Investigation of Duration-Dependent Multifactoring During Boiling on Down-Facing Heating Surface." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23386.

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A model of the “theatre of director” (MTD) links dependence of developed boiling HTC only on two external parameters (heat flux and average effective radius of active nucleation sites) to short duration of each action of cooling mechanisms. According multifactoring concept (MFC) significant prolongation of the actions of cooling mechanisms leads to transition to specific regimes with dependence on increased number of factors (duration-dependent multifactoring (DDM)). Splitting of developed boiling heat transfer curve into several curves, depending on sublooling of bulk liquid, direction of gra

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