On the velocity dependence of the erosion of ductile metals by solid particles at low angles of incidence

Finnie, I.; Mcfadden, D. H.

doi:10.1016/0043-1648(78)90147-3

Cited by 242 publications

(97 citation statements)

References 4 publications

(1 reference statement)

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“…An important feature of the theory is its prediction that erosion should depend on the cube of the impact velocity. Velocity exponents reported for the erosion of metals at normal incidence tend in general to be higher than the values of 2.3 -2.4 commonly found in low-angle erosion experiments (34). Velocity exponents from the literature are listed in Table 2; it is noteworthy that values of around 3 are often found for erosion by both angular and spherical particles at normal incidence, although there is some variation.…”

Section: A Comparison Of Theory With Experimentsmentioning

confidence: 97%

A model for the erosion of metals by spherical particles at normal incidence

Hutchings

1981

Wear

379

136

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A theoretical analysis is presented for the erosion of metals by spheres at normal incidence. The model employs a criterion of critical plastic strain to determine when material will be removed, and predicts velocity exponents of 3 for erosion and -2 for the mass of spherical particles which must hit the surface before material is removed. The mechanical properties of the metal are described by two quantities: its dynamic hardness and its ductility under erosion conditions. Data obtained in experiments with aluminium alloys as well as previously published data are compared with the theory.

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Section: A Comparison Of Theory With Experimentsmentioning

confidence: 97%

A model for the erosion of metals by spherical particles at normal incidence

Hutchings

1981

Wear

379

136

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“…This assumption was used in the present work. A number of mechanisms of base metal erosion have been proposed, the two most common are the cutting mechanism of Finnie 19;20;21;22 and the wear and deformation mechanism of Bitter 23;24. While Bitter's model of erosion is one of the most complete, the number of material dependent constants make it nearly impossible to use in most practical situations.…”

Section: Erosion Modelingmentioning

confidence: 99%

Numerical Prediction of Erosion-Corrosion in Bends

Keating¹,

Nešić²

2001

CORROSION

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A combination of computational fluid dynamics (CFD) and Lagrangian particle tracking has been used to predict two-phase erosion-corrosion in a three-dimensional square-sectioned U-bend. A commercial CFD code has been used to predict fluid flow fields using the k-e turbulence model. These predictions have been verified against experimental results. Mass transfer controlled oxygen corrosion was calculated using species concentration fields. The Lam-Bremhorst low Reynolds number modification was used in near-wall regions to accurately resolve the diffusional controlled sublayer. A Lagrangian particle tracking algorithm coupled with the eddy interaction model has been developed and verified for turbulent particle dispersion. Erosion has been predicted from wall impact data through the use of an empirical erosion model. Erosion rates for sand particles are presented. The effect of Reynolds number and bend orientation on erosion rates was investigated. Finally predictions of two-phase erosion-corrosion are presented.

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“…The mechanisms were based on a micromachining concept where the impacting particle penetrates the target a small amount, translates along the surface removing material ahead of it in a machining mode and finally leaves the surface. 4 A refined model was developed for this mechanism by Finnie that utilized the equation of motion of the particle tip to define an amount of target 5 material that was removed.' The scanning electron microscope (SEM) with its capability to achieve great depth of field at high magnifications makes it possible to observe what is physically happening on an eroding surface.…”

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confidence: 99%