Military aircraft that require high maneuverability, durability, ballistic protection, reparability, and energy efficiency require structural alloys with low density, high toughness, and high strength. Also, repairs to these aircraft demand a production process that has the flexibility to be relatively in-situ with the same high-performance output. Materials produced by the cold spray process, a thermo-mechanical powder consolidation technique, meet many of the requirements. In accordance with President Obamaâ€™s 2011 Materials Genome Initiative, the focus of this effort is to design customized aluminum alloy powders which exploit the unique behavior and properties of the materials created by the cold spray process. Analytical and computational models are used to customize microchemistry, thermal conditioning, and solidification behavior of the powders by predicting equilibrium and non-equilibrium microstructure and resulting materials properties and performance. Thermodynamic, kinetic, and solidification models are used, including commercial software packages Thermo-Calc, Pandatâ„¢, and JMatProÂ®, and TC-PRISMA. Predicted powder properties can be used as input into a cold spray process impact model to determine the consolidated materialsâ€™ properties. Mechanical properties of powder particles are predicted as a function of powder particle diameter and are compared to experimental results.
Worcester Polytechnic Institute
Materials Science & Engineering
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Belsito, D. L. (2014). Application of Computational Thermodynamic and Solidification Kinetics to Cold Sprayable Powder Alloy Design. Retrieved from https://digitalcommons.wpi.edu/etd-dissertations/28
through process modeling, CCT diagram, elemental impact factor, thermodynamics, kinetics, solidification, modeling, powder, mechanical properties, newtonian heat flow, cold spray, TTT diagram, powder production, atomization, equilibrium calculations