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2 edition of BFS simulation and experimental analysis of the effect of Ti additions on the structure NiAl found in the catalog.

BFS simulation and experimental analysis of the effect of Ti additions on the structure NiAl

BFS simulation and experimental analysis of the effect of Ti additions on the structure NiAl

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Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Alloying.,
  • Additives.,
  • Ternary alloys.,
  • Intermetallics.,
  • Nickel aluminides.,
  • Titanium alloys.,
  • Computerized simulation.,
  • Monte Carlo method.,
  • Temperature effects.

  • Edition Notes

    StatementGuillermo Bozzolo ... [et al.].
    SeriesNASA/TM -- 1999-208892, NASA technical memorandum -- 208892..
    ContributionsBozzolo, G., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17131731M

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BFS simulation and experimental analysis of the effect of Ti additions on the structure NiAl Download PDF EPUB FB2

The Bozzolo–Ferrante–Smith (BFS) method for alloy energetics is applied to the study of ternary additions to NiAl.

A description of the method and its application to alloy design is given. Two different approaches are used in the analysis of the effect of Ti additions to by: BFS Simulation and Experimental Analysis of the Effect of Ti Additions on the Structure of NiAl. BFS Simulation and Experimental Analysis of the Effect of Ti Additions on the Structure of NiAl Two different approaches are used in the analysis of the effect of Ti additions to NiAl.

First, a thorough analytical study is performed, where the energy of formation, lattice parameter and bulk modulus are calculated for a large number of. Get this from a library. BFS simulation and experimental analysis of the effect of Ti additions on the structure NiAl.

[Guillermo Bozzolo; Lewis Research Center.;]. BFS Simulation and Experimental Analysis of the Effect of Ti Additions on the Structure of NiAl The Bozzolo-Ferrante-Smith (BFS) method for alloy energetics is applied to the study of ternary additions to NiAl.

A description of the method and its application to alloy design is by: BFS Simulation and Experimental Analysis of the Effect of Ti Additions on the Structure of NiAl.

Article. Two different approaches are used in the analysis of the effect of Ti additions. The Bozzolo-Ferrante-Smith (BFS) semiempirical method for alloy energetics is applied to the study of ternary additions to NiAl alloys.

A detailed description of the method and its application to alloy design is given. Two different approaches are used in the analysis of the effect of Ti additions to NiAl. The experimental work was conducted in the normal course of evaluating these alloys and as a check on the modeling effort.

In this paper, we will review and extend BFS-based analyses of the structure of NiAl with ternary and quaternary additions (Ti, Cr, Cu), leading to the possibility of predicting the structure of higher order alloys. Alloying additions of Ti to NiAl are of technological interest since NiAl+Ti alloys are extremely creep resistant.

Also, Cr additions are of interest due to its low solubility and the potential for precipitating α-Cr, which at higher volume fractions acts as a ductile phase toughening r, very little is known about the structure of the corresponding.

Atomistic Simulations and Experimental Analysis of the Effect of Ti Additions on the Structure of NiA1 Guillermo Bozzolo Ohio Aerospace Institute Cleveland, Ohio Ronald D.

Noebe and John Ferrante Lewis Research Center Cleveland, Ohio Anita Garg A YT Corporation Cleveland, Ohio Carlos Amador Universidad Nacional Autonoma de Mexico Mexico City.

BFS Simulation and Experimental Analysis of the Effect of Ti Additions on the Structure of NiAl, J. Comput. Aided Mater. Aided Mater.

Des., 6, CrossRef Google Scholar. Carlos Amador's 13 research works with citations and reads, including: A comparative DFT study of the catalytic activity of the 3d transition metal sulphides surfaces.

Alloying additions of Ti to NiAl are of technological interest since NiAl- Ti alloys are extremely creep resistant. Also, Cr additions are of interest due to its low solubility and the potential for precipitating (alpha-Cr, which at higher volume.

AlNi 2 Ti with L 2 1 structure can provide NiAl or Ni-base and Ti-base alloys with good high-temperature mechanical properties by precipitate strengthening J. BFS simulation and experimental analysis of the effect of Ti additions on the structure of NiAl.

Comput. Aided Mater. Des. Site occupancy of Ti and Cu (BFS and Monte Carlo simulations) Atom-by-atom analysis of the ground state Ground state structure versus Cu concentration Local environment analysis of atomic coupling Local environment analysis of the ternary system Ti site preferenc e in NiAl John Ferrante's research works with 6, citations and 3, reads, including: New Semi-Empirical Method for Alloys.

Wolverton and D. Defontaine, "Site Substitution of Ternary Additions to Ni3al (Gamma') From Electronic-Structure Calculations", Physical Review B, Vol,pp. These alloys were designed by adding Ti into a previously-studied NiAl-strengthened ferritic alloy (denoted as FBB8 in this study).

Following with the concept of HPSFAs, in the present research, a systematic investigation on adding other elements, such as Hf and Zr, and optimizing the Ti content within the alloy system, has been conducted, in.

TEM analysis of long-period superstructures in TiAl single crystal with composition gradient p. Influence of micro-alloying on oxidation behavior of TiAl p. The effects of substitutional additions on tensile behavior of Nb-silicide based composites p.

Effect of microstructure and Zr addition on the crystallographic orientation. We studied the effect of Cu addition on the hardness of ultra-low carbon steels heat treated with different cooling rates using thermal simulation techniques.

The microstructural evolution, Cu precipitation behaviors, variations of Vickers hardness and nano-hardness are comparatively studied for Cu-free and Cu-bearing steels. The microstructure transforms from ferritic structure.

The phase diagram of the binary system Ni-Al has been determined near the Ni 3 Al composition as the basis for the growth of Ni 3 Al crystals by the Czochralski and Bridgman methods. The phase morphology of crystals themselves also provides important information about the shape of the phase diagram.

The temperature dependence of the long range order has been measured. Microstructures properties of Ti-based alloys. Figure 1 demonstrates the XRD patterns of pure Ti and Ti‒2X alloys at room temperature. It can be noticed that all the Ti‒2X alloys, as well as. According to this reaction, the extent of carbon removal from the melt is strongly influenced by the amount of Ti additions.

Hence, proper titanium levels can result in total removal of carbon from the liquid. Notice from this figure that Ti additions above %, totally eliminate the undesirable Al 4 C 3 precipitates. Making Cr, Ti, B. The purpose of this work is to study the effect of composition and microstructures in a series of Ni-rich prototype alloys, Ni x –Ti x –W x (in which x is in at.%), in order to understand and ultimately optimize the performance of these materials.

The adopted strategy was to combine experimental studies using Neutron Diffraction. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.

THERMEC by Tara Chandra,available at Book Depository with free delivery worldwide. The quantitative composition analysis of all the NiAl-based particles from the proximity histograms is summarized in Fig. The concentration profiles of Ni and Al across the NiAl-based particle/matrix interface are increased monotonically, with the maximum occurring near the center of the NiAl-based particles, while that of Cu exhibits a non.

a number of ternary transition metals additions in β-NiAl to increase its thermal stability. Keywords: Miedema’s model, formation enthalpy, nickel aluminides. INTRODUCTION The enthalpy of formation is regarded as an indicator of alloy stability hence a number of methods, both computational and experimental, have been devised to estimate the.

A Steady State Electrothermic Simulation Analysis of a Carbothermic Reduction Computer Simulation of The Structure-Energetical Transformations at the Combustion Synthesis in the Systems NiAl and TiAl M.D. Starostenkov, G.M. Poletayev and A.S. Starostenkova. NiAl matrix composites containing graphene showed satisfactory performance in friction coefficient and wear resistance compared to NiAl matrix composites without graphene.

For the active effect of graphene, the friction coefficient and wear rate of NiAl matrix composites were maintained at relatively lower values.

Dual Failure Resilient BFS Structure Merav Parter Abstract We study breadth- rst search (BFS) spanning trees, and address the problem of designing a sparse fault-tolerant BFS structure, or FT-BFS for short, resilient to the failure of up to two edges in the given undirected unweighted graph G, i.e., a sparse subgraph H of Gsuch that.

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Study of the Microstructure of a Ti48Al48Cr2Nb2 Alloy. Titanium-nickel (Ti-Ni)–based bulk metallic glass (BMG) alloys were prepared by centrifugal casting into a copper mold. The effect of five rolled temperatures, namely, room temperature and,and °C, on the behavior of amorphous BMG, the microstructural features, and the mechanical properties were investigated.

Paul Halmos famously remarked in his beautiful Hilbert Space Problem Book [24] that \The only way to learn mathematics is to do mathematics." Halmos is certainly not alone in this belief.

The current set of notes is an activity-oriented companion to the study of linear functional analysis and operator algebras. The influence of Ti additions in Al-Li base alloys. Vasilescu, M. / Vasilescu, I. | Effect of Trace Mg and Zn Additions on Microstructure and Mechanical Properties of an Al-Cu-Li-Mn-Zr Alloy.

Chen, XRD analysis and FEM simulation of residual stress distribution on laser shocked aluminum alloy. Song, H.B. / Peyre. It has been documented that Cu-rich nanoparticles initially have a metastable body-centered cubic (bcc) structure with diameters less than 5 nm 5,6,7,8,16,17,18,19,20,21, whereas NiAl-based.

This paper presents simulation of molecular dynamics for the deposition of Titanium (Ti) and Nickel (Ni) particles on Ti substrate during Cold Gas Dynamic Spray (CGDS) process. The influencing factors of the deposition process, such as particle incident velocity, particle size and particle temperature are taken into consideration.

Ti and Ni were selected because of their. Line Profile Analysis (LPA) of diffraction patterns collected on ball milled FeMo powders was carried out by Whole Powder Pattern Modelling (WPPM).

Results show the progressive comminution effect produced by increasing ball milling time, in terms of decrease in mean crystallite size and continuous narrowing of the size distribution. Analysis of welded specimen for simulation of process which can be used for further evaluation of structural life, fatigue, determination of critical areas of the structure.

Experimental setup for testing of tensile features for specimens is illustrated on the Figure 1. Sample was joined by using standard TIG welding process. A block copolymer self-consistent field theory (SCFT) model is used for direct analysis of experimental X-ray scattering data obtained from thin films of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) made from directed self-assembly.

This proceedings collected together ninety-seven selected articles on recent research works and innovations in material science and energy engineering, presented at the International Conference on Materials Science and Energy Engineering (CMSEE ), held in Sanya, Hainan, China during Decemberand control.

A 3-dimensional finite element simulation model has been developed to simulate multi-layer deposition of Ti-6Al-4V in SLM. A physics-based layer build-up approach coupled with a surface moving heat flux was incorporated into the modeling process.

The melting pool shape and dimensions were predicted and experimentally validated.Although many studies have reported on the efficiency of Ni–Ti while shaping canal walls using different experimental models;[8,9] an assessment of the surface quality of the cutting surfaces and cutting heads after repeated use is necessary to give an insight as to the series of changes that occur in an instrument before its ultimate failure.