Testing and modeling of particle size effect on erosion of steel and cobalt-based alloys

• Published in: Powder technology Vol. 394; pp. 1186 - 1194
• Main Authors: Arabnejad, H., Uddin, H., Panda, K., Talya, S., Shirazi, S.A.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-12-2021; Elsevier BV
• Subjects: Air entrainment; Cobalt base alloys; Cobalt-based alloy; Empirical equations; Gas jets; Impact velocity; Particle size; Particle tracking; Silica; Silicon dioxide; Size effects; Stainless steel; Steel; Submerged erosion; Particle size; Submerged erosion; Cobalt-based alloy; Stainless steel
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2021.09.057

Direct impingement (DI) erosion testing of steel and cobalt-based alloys is conducted with particles entrained in air and water. The tests are performed using 75- and 300-μm silica particles with three particle velocities and five impact angles. The mass loss results are used to develop an empirical equation that contains an explicit exponential term for the particle size effect. The erosion equation obtained from the gas jet experiments is implemented into a CFD solver with Lagrangian particle tracking for the liquid-submerged geometry. The CFD-based erosion predictions agree fairly with the experimental measurement for both particles. Strong effect has been observed for the exponential correction term in the erosion equation for liquid-solid flow cases; particularly with small particles at low impact velocities.
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•Dry and wet direct impingement tests have been performed.•Particle size of 75 μm and 300 μm have been used.•Erosion of cobalt-based alloys have been characterized and compared with that of steel.•Experiment based erosion equation has been developed for particle size variation.•Computational Fluid Dynamics (CFD) model predicts erosion compareble to test measurements.