1. The Effect of Submicron Second-Phase Particles on the Rate of Grain Refinement in a Copper-Oxygen Alloy During Cold Spray
- Author
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Sylvie Descartes, Nicolas Brodusch, Richard R. Chromik, Raynald Gauvin, Yinyin Zhang, J. Michael Shockley, Department of Mining and Materials Engineering [Montréal], McGill University = Université McGill [Montréal, Canada], Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), and U.S. Naval Research Laboratory, Washington, D. C.
- Subjects
Materials science ,Alloy ,Gas dynamic cold spray ,Nucleation ,02 engineering and technology ,engineering.material ,01 natural sciences ,[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] ,particle-stimulated nucleation (PSN) ,Phase (matter) ,0103 physical sciences ,Materials Chemistry ,cold spray ,010302 applied physics ,Metallurgy ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Surfaces, Coatings and Films ,high-resolution electron backscatter diffraction (EBSD) ,second-phase particles ,Dynamic recrystallization ,engineering ,Particle ,Deformation (engineering) ,0210 nano-technology ,Electron backscatter diffraction - Abstract
International audience; The effect of non-deformable submicron secondphase particles (d = 200-500 nm) on microstructural refinement during cold spray was examined. Using single particle impact testing, two types of splats were fabricated using two different feedstocks: a Cu-0.21wt.%O powder containing Cu2O second-phase particles and a single-phase Cu. Microstructural evolution analysis using high-resolution electron backscatter diffraction shows grain refinement occurred at a higher rate in the Cu-0.21wt.%O powder. That was due to dynamic recrystallization initiated by particle-stimulated nucleation (PSN). High-strain-rate deformation of cold spray was found to be the key to activate PSN. The present study suggests cold spray is apossible technique to fabricate ultrafine-grained materials by using feedstock containing second-phase particles.
- Published
- 2017
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