Physical Experiments and DEM Simulations for Erosion of Iron Target by Two Impingements of Al₂O₃ Particle with Impingement Angles of Double 90º

Abstract:

In mechanical equipment interacting with impingement particles, worn surface morphology of parts and components is formed by an accumulative action of a large number of single-particle erosions. To exhibit the mechanism of multi-particle erosion of target, three physical experiments and Discrete Element Method (DEM) simulations of erosion of iron target by the two vertical impingements of Al₂O₃ particle are carried out under three different landing errors x of the two impingements. The experimental results showed that each of two overlapping worn morphologies by the two impingements has an spherical cap shape. When x is larger than radius R₁ of worn morphology of target by the first erosion, two morphologies with an spherical cap shape are very close in size; while the size of worn morphology by the second erosion increases with the decrease of x, when x is smaller than R₁. The predicting worn morphologies by DEM are almost consistent with the experimental results, where the maximum relative deviation in size of worn morphology is 2.98% in the direction along x, and is 3.93% in the direction perpendicular to x. All these proved the effectiveness of the DEM model in predicting erosion of target by two impingements of particle.

• Periodical: Defect and Diffusion Forum (Volume 430)
• Pages: 63-68
• DOI: https://doi.org/10.4028/p-4GrGIZ
• Online since: January 2024
• Authors: Zi Qiang Fang*, Song Lin Peng
• Keywords: Collision Energy, DEM, Electron Microscopic Image, Erosion by Two Impingements, Worn Surface Morphology

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