Index Catalog // ScholarsArchive@OSU

Atomistic modeling of the order-disorder phase transformation in the Ni₂Cr model alloy

Creator:: Barnard, L., Young, G. A., Swoboda, B., Choudhury, S., Van der Ven, A., Morgan, D., and Tucker, J. D.
Abstract:: Mechanical property degradation due to the disorder-order phase transformation is of potential concern for alloys based on the Ni-Cr binary system, particularly in nuclear power applications, where component lifetimes can exceed 80 years. In the present research, a disorder-order phase transformation has been studied in the Ni-33 at.% Cr model...
Resource Type:: Article
Full Text:: transformation in the Ni₂Cr model alloy Atomistic modeling of the order-disorder phase transformation in the

Role of Stoichiometry on Ordering in Ni-Cr Alloys

Creator:: Teng, Fei
Abstract:: Mechanical property degradation due to isothermal ageing is of potential concern for alloys based on the Ni-Cr binary system (e.g., Inconel 690, 625), particularly in nuclear power applications where component lifetimes can exceed 40 years. In the present research, the disorder-order phase transformation, which is the primary mechanism of ageing,...
Resource Type:: Masters Thesis
Full Text:: component lifetimes can exceed 40 years. In the present research, the disorder-order phase transformation

The Effect of Isothermal Aging on the Development of Long-Range Order in Ni-based Alloys

Creator:: Aerne, Nicholas S. J.
Abstract:: Nickel (Ni)-based alloys with a high chromium (Cr) content are frequently employed in applications where elevated temperatures and/or corrosive environments are present due to their excellent corrosion resistance and mechanical properties. However, a gap exists around the formation, and kinetics of long-range order (LRO) Ni2Cr phase in both model binary...
Resource Type:: Dissertation
Full Text:: formation, and kinetics of long-range order (LRO) Ni2Cr phase in both model binary Ni- Cr and ternary Ni-Cr

Acceleration of Long-Range Ordering in NiCrFe Alloys Via Proton Irradiation

Creator:: Evered, Cole E.
Abstract:: This work explores the hypothesis that proton irradiation is a feasible alternative to simulate accelerated thermal aging for Ni2Cr long-range ordered phase formation within NiCr and NiCrFe alloys. In this study, various model alloys and commercial alloys 690 and 690+P (0.01 wt.% P) were subject to 2 MeV proton irradiation...
Resource Type:: Masters Thesis
Full Text:: of the Ni2Cr phase, as well as the change in matrix lattice parameter. The irradiated alloys showed

Movement of elemental constituents in sagehill loamy sand treated with municipal waste

Creator:: Halvorson, Gary Alfred
Abstract:: Metropolitan solid wastes and sewage sludges present a serious disposal problem for many communities. To assess the feasibility of disposal or utilization of these waste products on soils, a study was initiated to evaluate plant growth and soil elemental interactions on a loamy fine sand treated with metropolitan waste. Shredded...
Resource Type:: Masters Thesis
Full Text:: . Ammonium sulfate fertilizer was added in 1972 to the fescue and alfalfa plots at rates of 250, 500, 1000

Refractory metals processing waste utilization on Dayton silty clay loam soil

Creator:: Polson, Richard Lewis
Abstract:: Waste products from industry have often been disposed in landfills without regard for any beneficial uses of the product in agricultural production. This research was conducted to determine the effect of a refractory metal processing waste product on (a) soil chemical and physical properties, (b) perennial ryegrass forage quality and...
Resource Type:: Masters Thesis
Full Text:: (Leeper, 1972). Addition of soluble Fe compounds to normal aerated soil will result in the transformation

Phase diagram, thermal stability, and high temperature oxidation of the ternary Cu-Ni-Fe system

Creator:: Gallino, Isabella
Abstract:: Due to the aluminum industry demands, a large effort has recently been devoted to the development of special alloys to be used as inert anodes for a newly designed aluminum reduction cell. The implementation of this new technology aims at the replacement of the graphite anodes that have been used...
Resource Type:: Dissertation
Full Text:: been also discussed in terms of thermodynamic and kinetic laws. The phase Redacted for Privacy

Characterization of Low Temperature Crystallization Growth Parameters of the Growth-dominated Phase Change Materials: Ge1Sb6Te1 and Ga15Sb85 by Optical Microscopy

Creator:: Winseck, Mark M.
Abstract:: Phase change memory materials are a set of chalcogenide or pnictogenide materials systems currently being researched for use in optical and resistive based memory systems due to their large change in optoelectronic properties between the amorphous and the crystalline states. For these materials systems to be considered as a suitable...
Resource Type:: Masters Thesis
Full Text:: change in either the optical or electrical properties of the system upon phase transformation. In most

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

Creator:: Costa, Timothy B.
Abstract:: In this work we consider two multiscale applications with tremendous computational complexity at the lower scale. First, we examine a model for charge transport in semicon- ductor structures with heterojunction interfaces. Due to the complex physical phenomena at the interface, the model at the design scale is unable to adequately...
Resource Type:: Dissertation
Full Text:: problem we develop a reduced order three-scale fluid flow model based on a spatial decomposition of the

Investigation of Thermal Degradation in Structural Alloys for Nuclear Power Systems

Creator:: Teng, Fei
Abstract:: The thermal degradation of structural materials is considered to be a key factor for evaluating the lifetime of current nuclear power plants. Ni-based and Fe-based alloys, such as 690, 625, 304, and 316, are widely used in nuclear industry as structural components due to the extraordinary corrosion resistance and mechanical...
Resource Type:: Dissertation
Full Text:: the existing of LRO-Ni2Cr in aged Ni at%33Cr binary model alloy. (c) – (e) show BF and DF images of

ScholarsArchive@OSU

Atomistic modeling of the order-disorder phase transformation in the Ni₂Cr model alloy

Role of Stoichiometry on Ordering in Ni-Cr Alloys

The Effect of Isothermal Aging on the Development of Long-Range Order in Ni-based Alloys

Acceleration of Long-Range Ordering in NiCrFe Alloys Via Proton Irradiation

Movement of elemental constituents in sagehill loamy sand treated with municipal waste

Refractory metals processing waste utilization on Dayton silty clay loam soil

Phase diagram, thermal stability, and high temperature oxidation of the ternary Cu-Ni-Fe system

Characterization of Low Temperature Crystallization Growth Parameters of the Growth-dominated Phase Change Materials: Ge1Sb6Te1 and Ga15Sb85 by Optical Microscopy

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

Investigation of Thermal Degradation in Structural Alloys for Nuclear Power Systems

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