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Showing 1 to 16 of 16 for “"phase fraction"”.
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Pressure drop and phase fraction in oil-water-air vertical pipe flow
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Determination of Phase Fraction, Lattice Parameters and Crystallite Size in Mechanically Alloyed Fe-Ni Powders
… X-ray diffractometry was used to determine the phase fractions of the bcc and fcc phases in the alloys and to determine the lattice parameters and crystallite size. The main objective of this project is to study how the milling at low temperatures affects the region of two phase co-existence, …
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Atomistic to Continuum Multiscale and Multiphysics Simulation of NiTi Shape Memory Alloy
… diffusionless, displacive (solid to solid) phase transformation, due to the application of temperature and/ or stress (/strain). Among different SMAs, NiTi is a popular one. NiTi shows reversible phase transformation, the shape memory effect (SME), where irreversible deformations are …
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Thermal and Microstructure Modeling of Metal Deposition Processes with Application to Ti-6Al-4V
… A microstructure model that predicts the alpha phase fraction and morphology evolution was constructed to quantify the effect of thermal cycling on the as-deposited microstructure evolution. Alpha dissolution and growth are modeled assuming one-dimensional plate dissolution according to a …
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Processing-microstructure-property relationships in additively manufactured duplex stainless steels
… and properties, specifically the defect content, phase fraction, and microindentation hardness. Various scanning strategies including raster, zigzag, spiral, and a serpentine pattern were investigated to understand their influence on the microstructure of AM DSS materials, specifically the grain …
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Effects of processing on microstructure and properties of Ti-Ta Alloys
… x-ray diffractometry was used to identify phases present at temperatures ranging from room temperature up to 750 [degree]C. Hot extrusion without further heat treatment was found to be insufficient to produce a homogenous, fully dense alloy. Elongation, an indicator of potential shape …
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Investigation of mechanical behavior of Alloy 709 for advanced fast reactor applications
… using tensile tests with in-situ X-ray diffraction (XRD) at various temperatures, ranging from room temperature (RT) to 600ºC, and displacement rates, from 0.001 to 0.004 mm/s. Using these stress-strain curves, empirical models of Alloy 709’s deformation behavior over a range of …
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Lithium-ion Battery Devices as a Method of Doping Metal Halide Perovskites
… are discussed. It is shown that a mixed 2D/3D phase optimises the density of electrochemically active lead-halide layers, relative to the electrochemically inactive lithium diffusion pathways through the structure provided by butylammonium organic cations. However, the necessity for aprotic …
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Impedance Sensors for Fast Multiphase Flow Measurement and Imaging
Multiphase flow denotes the simultaneous flow of two or more physically distinct and immiscible substances and it can be widely found in several engineering applications, for instance, power generation, chemical engineering and crude oil extraction and processing. In many of those applications, …
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Analysis and modelling of the dislocation response during non-isothermal creep in Ni-SX superalloys
… and dislocation glide and climb in the γ-phase on the overall creep resistance of the alloys were examined with the model. Furthermore, the rate of non-isothermal micro-structural transfor- mation (via rafting and coarsening) and its impact on the creep response was examined. The …
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Predicting microstructural heterogeneities in the laser powder bed fusion of γ′ strengthened nickel-base superalloys
… and the apparent nucleation of the γ/γ′ eutectic phase. It is proposed here that a closer examination of the development of these microstructural features can lead to new insights into the physical mechanisms driving the formation of cracks upon rapid solidification. To study the previously …
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Molecular Beam Epitaxy Synthesis and Characterization of Indium Selenide Films
… of the effect of cooling rate on the β→α phase transition, and electrical characterization β-, γ-, and κ-In2Se3 thin-film transistors has been demonstrated. The effects of substrate temperature, substrate choice, and Se/In flux ratio during molecular beam epitaxy synthesis on the phase …
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Effect of sintering protocols on zirconia with various YTTRIA concentrations
… using an Instron 5566A. The crystallographic phases of Tosoh zirconia were evaluated by X-ray diffraction (XRD) utilizing a D2 Phaser desktop diffractometer and the phase fraction was determined by full-profile refinements using GSAS-II software. The statistics were analyzed using JMP Pro 15.0 …
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Thermo-mechanical behavior of steel in the continuous casting process from meniscus to caster exit
… model is also developed for steel multiphase mixtures near the eutectoid transformation. This new constitutive model extends the temperature range of existing constitutive models for steel below the temperature range for the austenite phase. The domain of the solidifying steel strand …
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Die Notwendigkeit der Doppelfärbung für Zytokeratin und DNA in der Durchflusszytometrie sowie ihre Bedeutung für die durchflusszytometrische Erfassung von p53 am Beispiel des Mammakarzinoms
… Die Proliferationsrate, insbesondere die S-Phasen-Fraktion erhöhte sich ebenfalls signifikant. Die vergleichenden Zellzyklusanalysen der Zytokeratin-positiven und der p53-positiven Tumorzellen zeigte eine geringere Proliferationsfraktion der p53-positiven Zellen, verglichen mit den …
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Fabrication, Kinetics and Crystallography of Lithium Disilicate Glass-Ceramics
… glasses by in situ and real-time observations of phase transition using X-ray diffraction (XRD) technique with the state-of-the-art synchrotron radiation. In the meantime, it is of interest to systematically study the evolution of crystallographic structure of the involved crystalline phases …