Title

MICROSTRUCTURE REFINEMENT BY METALLIC PARTICLE IMPACT

MICROSTRUCTURE REFINEMENT BY METALLIC PARTICLE IMPACT

Authorship

Lemiale, Vincent; Estrin, Yuri; O’Donnell, Robert; Kim, Hyoung Seop

DOI

10.5151/2594-5327-33365

Downloads

heading.download_article_detail 52 Downloads

Abstract

Grain refinement by plastic deformation is becoming increasingly popular as a way of producing metals with improved properties, such as higher mechanical strength. Surface treatment techniques in which a metallic substrate is bombarded with metallic particles can generate nanocrystalline layers in the impact zone. Understanding the physical mechanisms behind this grain refinement is crucial to achieve an improvement of existing experimental processes. In this paper, we propose a numerical framework combining finite element simulations with a dislocation-based material model to predict the evolution of the microstructure under particle impact. A single particle impacting a metallic substrate along its normal was simulated for different initial velocities. The simulations were compared with previously reported numerical and experimental data. The results indicate that our model accurately captures the grain refinement in the impact zone for a broad range of velocities. This approach provides valuable information on the formation of nanocrystalline layers in both the substrate and the impacting particle. It has potential applications in any process involving surface treatment by high-velocity particles, such as shot peening, surface mechanical attrition treatment, kinetic metallization, cold spray, etc.

 

Grain refinement by plastic deformation is becoming increasingly popular as a way of producing metals with improved properties, such as higher mechanical strength. Surface treatment techniques in which a metallic substrate is bombarded with metallic particles can generate nanocrystalline layers in the impact zone. Understanding the physical mechanisms behind this grain refinement is crucial to achieve an improvement of existing experimental processes. In this paper, we propose a numerical framework combining finite element simulations with a dislocation-based material model to predict the evolution of the microstructure under particle impact. A single particle impacting a metallic substrate along its normal was simulated for different initial velocities. The simulations were compared with previously reported numerical and experimental data. The results indicate that our model accurately captures the grain refinement in the impact zone for a broad range of velocities. This approach provides valuable information on the formation of nanocrystalline layers in both the substrate and the impacting particle. It has potential applications in any process involving surface treatment by high-velocity particles, such as shot peening, surface mechanical attrition treatment, kinetic metallization, cold spray, etc.

Keywords

Particle impact, Grain refinement, finite element simulations, Copper

Particle impact, Grain refinement, finite element simulations, Copper