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Search Publications by: Carelyn E. Campbell (Fed)

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Displaying 76 - 100 of 122

Strategy for extensible, evolving terminology for the Materials Genome Initiative efforts

July 1, 2015
Author(s)
Talapady N. Bhat, Ursula R. Kattner, Laura Bartolo, Carelyn E. Campbell, John T. Elliott
Intuitive, flexible, and evolving terminology plays a significant role in capitalizing on recommended knowledge representation models for material engineering applications. In this article we present a proposed rules-based approach with initial examples

Evolution of gamma/gamma-prime Microstructure in Ternary Co-Al-W Alloys

June 29, 2015
Author(s)
Eric Lass, Yaakov S. Idell, Carelyn E. Campbell, Ursula R. Kattner
The discovery of a two-phase γ (FCC)-γ' (L12) field in the ternary Co-Al-W phase diagram has sparked significant research interest into possible Co-based analogs to traditional Ni-based superalloys used in turbine engine applications. This work

gamma-prime Phase Stability and Phase Equilibrium in Ternary Co-W-Al at 900 degC

October 15, 2014
Author(s)
Eric Lass, Maureen E. Williams, Carelyn E. Campbell, Kil-Won Moon, Ursula R. Kattner
Phase equilibria at 900 °C in the Co-rich Co-W-Al ternary system is investigated through isothermal annealing of six alloy compositions for times up to 8000 h. The volume fraction of the L12-gamma-prime phase co-existing with disordered FCC-gamma, B2 and

Structural Materials Data Demonstration Project: Resource for Thermal Process Modeling

July 1, 2014
Author(s)
Carelyn E. Campbell, Ursula R. Kattner, Alden A. Dima, Scott Henry, Larry A. Berardinis, Tom Searles, Laura M. Bartolo
Integrated Computational Materials Engineering (ICME)requires the availability of supporting data for modeling across multiple length scales. It also requires robust data schema and input-output protocols. To address these needs, a team working under a

Materials Genome III: CALPHAD Data Repositories and Beyond

April 29, 2014
Author(s)
Carelyn E. Campbell, Ursula R. Kattner, Zi-Kui Liu
Initially, the CALPHAD method was established as a tool for treating thermodynamics and phase equilibria of multicomponent systems. Since then the method has been successfully applied to diffusion mobilities in multicomponent systems, creating the

Materials Genome III: Building CALPHAD File and Data Repositories

January 1, 2014
Author(s)
Carelyn E. Campbell, Ursula R. Kattner, Zi-Kui Liu
The future development of the CALPHAD method requires establishing file and data repositories and tools to automate the modeling process and to enable efficient implementation of new models and development of multicomponent descriptions. To advance these

Atom-Probe Tomographic Study of ?/?' Interfaces and Compositions in an Aged Co-Al-W Superalloy

December 12, 2012
Author(s)
Eric Lass, Kil-Won Moon, Maureen E. Williams, Carelyn E. Campbell, Ursula R. Kattner, David C. Dunand, Peter J. Bocchini, David N. Seidman
Atom-probe tomography (APT) is utilized to investigate, in a Co-9.7Al-10.8W at.% alloy aged at 900 °C for 1000 h, the phase composition and partitioning behavior of the two-phase ɣ(f.c.c.)/ɣ'(L12) microstructure. The APT composition of the ɣ-matrix (Co-8

Evaluation of Self Diffusion Data Using Weighted Means Statistics

June 1, 2011
Author(s)
Carelyn E. Campbell, Andrew L. Rukhin
Several CALPHAD-based assessments of the self-diffusion mobility of Ni in pure Ni and Al in pure Al have been published. In an effort to determine which assessment best represents the experimental data, weighted means statistics are used to determine

Diffusivity and Mobility Data

December 31, 2009
Author(s)
Carelyn E. Campbell
Diffusion is the process by which molecules, atoms, ions, point defects, or other particle types migrate from a region of higher concentration to one of lower concentration. The diffusivity of an atom or diffusion coefficient is the rate at which a

Enhanced Mass Transport in Ultra-Rapidly-Heated Ni/Si Thin-Film Multilayers

November 15, 2009
Author(s)
Lawrence P. Cook, Richard E. Cavicchi, Nabil Bassim, Susie Eustis, Winnie Wong-Ng, Igor Levin, Ursula R. Kattner, Carelyn E. Campbell, Christopher B. Montgomery, William F. Egelhoff Jr., Mark D. Vaudin
We have investigated multilayer and bilayer Ni/Si thin films by nano-differential scanning calorimetry (DSC) at ultra rapid scan rates, in a temperature-time regime not accessible with conventional apparatus. DSC experiments were completed at slower scan