The Influence of Impact Velocity on Stresses and Failure of S355j2 Steel Under Slurry Erosion Conditions

Dominika Ewa Zakrzewska; Marta H. Buszko

doi:10.12913/22998624/192638

The Influence of Impact Velocity on Stresses and Failure of S355j2 Steel Under Slurry Erosion Conditions

Abstract

The purpose of this work was to determine the essence of the influence of the impact velocity (5, 7, and 9 m/s) on Hertzian stresses and the erosion mechanism of ferritic-pearlitic S355J2 steel. The investigations were carried out using a slurry pot tester. S355J2 steel showed a strong sensitivity to changes in impact velocity. A significant increase in erosion rate was observed at a velocity of 9 m/s. This increase was 5-fold and over 15-fold compared to velocities of 7 m/s and 5 m/s, respectively. The study of Hertzian stress is crucial in erosion research because it helps understand how impact energy is absorbed by the eroded material and the mechanisms that cause surfacewear. A linear increase in mean contact pressure and maximum shear stress was observed with increasing impactvelocity. The mean contact pressure increased from 4.3 GPa to 5.5 GPa and the maximum shear stress increasedfrom 2.0 GPa to 2.5 GPa. The kinetic energy of the solid particles that hits the eroded steel is distributed in the con-tact area, which leads to various deformations and wear mechanisms. The primary type of deformation was fatiguedegradation of the surface layers of the eroded steel. The high kinetic energy of solid particles contributed to theformation of plastic deformations and strongly deformed steel flakes. Higher impact velocities generally result ingreater forces and contact stresses on the material surface. This led to the intensification of plastic deformation inthe contact areas and increased the Hertzian stresses.

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Authors (2)

Dominika Ewa Zakrzewska (formerly: Dominika Zakrzewska) dr inż.
Marta H. Buszko
- Instytut Maszyn Przepływowych PAN

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DOI:: Digital Object Identifier (open in new tab) 10.12913/22998624/192638
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Keywords

SLURRY EROSION, STEEL, HERTZIAN STRESSES, HARDNESS, DEGRADATION MECHANISM

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

Advances in Science and Technology Research Journal no. 18, pages 62 - 77,
ISSN: 2080-4075

Language:

English

Publication year:

2024

Bibliographic description:

Zakrzewska D., Buszko M. H.: The Influence of Impact Velocity on Stresses and Failure of S355j2 Steel Under Slurry Erosion Conditions// Advances in Science and Technology Research Journal -,iss. 7 (2024), s.62-77

DOI: