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- W2308913499 abstract "This paper reports on initial work attempting to reproduce the erosive mechanisms found to operate under high-energysand impingement on CVD boron carbide coatings. Static Hertzian tests were conducted using spherically capped coneindenters, 90° cone angle, of radii 20 and 40 ?m. The calculated contact stresses generated were comparable with thosepredicted by dynamic Hertzian theory for 235 ?m angular sand particles impacting between 65-270m/s and at 90°. Theload varied between 1-7.5N and the depth of penetration between 1-5?m. The calculated depth of maximum shear stressis between 4-7?m, i.e. within the coating thickness. Discontinuities (Pop-in’s) are observed at loads over 2N duringloading across several indentations on the surface. Microscopic examination of the indented coating surface revealed little surface damage, suggesting the discontinuities observed are predominantly a result of sub-surface damage. For repetitive indentation, at a single location, these discontinuities are magnified 3-5 times in depth with those compared to the static indentation tests. As the load is increased, the time of apparent failure shows a steady decrease. However, no widespread surface failure is observed even from these tests, suggesting the absence of local surface damage phenomena in the coating during multiple repetitive impacts." @default.
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- W2308913499 date "2001-01-01" @default.
- W2308913499 modified "2023-09-27" @default.
- W2308913499 title "Simulation of erosive wear of CVD boron carbide coatings by static and repetitive nanoindentation" @default.
- W2308913499 hasPublicationYear "2001" @default.
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