The Effect of Submicron Second-Phase Particles on the Rate of Grain Refinement in a Copper-Oxygen Alloy During Cold Spray - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Thermal Spray Technology Année : 2017

The Effect of Submicron Second-Phase Particles on the Rate of Grain Refinement in a Copper-Oxygen Alloy During Cold Spray

Résumé

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 a possible technique to fabricate ultrafine-grained materials by using feedstock containing second-phase particles.

Dates et versions

hal-01862793 , version 1 (27-08-2018)

Identifiants

Citer

Yinyin Zhang, Nicolas Brodusch, Sylvie Descartes, J. Michael Shockley, Raynald Gauvin, et al.. The Effect of Submicron Second-Phase Particles on the Rate of Grain Refinement in a Copper-Oxygen Alloy During Cold Spray. Journal of Thermal Spray Technology, 2017, ⟨10.1007/s11666-017-0603-0⟩. ⟨hal-01862793⟩
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