Cavitation erosion resistance of high-entropy FeCoCrNiMo_XB_0.2 coatings cladded by laser

Abstract

The cavitation erosion resistance of high-entropy FeCoCrNiMo X B 0.2 (X = 0, 0.5, 1), coatings cladded by laser was studied. The test was processed by a magnetostrictive cavitation method in both distilled water and 3.5 wt-% NaCl solution. It was observed that the massloss rate of the coatings rarely increased or even decreased in the first few hours. This study verified that the formation of cavitation pits and extend of cracks due to the mechanical shock were the dominant factors causing cavitation of the coatings. The additional Clexhibited a deteriorative effect on the cavitation erosion performance of this high-entropy alloy coating, which leads to an increase of the mass-loss in NaCl solution than that in distilled water. Moreover, the hardness and stability of the high-entropy coatings were enhanced owing to the increase of Mo content, thus improving the cavitation erosion resistance.

Iso-material manufacturing of 304 stainless steel: Microstructure, corrosion-cavitation erosion synergistic behaviour

“…The mass loss of the untreated and LSMed samples in deionised water is 35 ± 1 and 14 ± 0.3 mg, whereas the mass loss in 3.5 wt% NaCl solution is 40 ± 0.6 and 20 ± 0.3 mg after 8-h CE, respectively. The mean depth of erosion ( MDE ) and the mean depth of erosion rate ( MDER ) can be used to evaluate CE resistance and calculated as follows: 3–57 where Δw is the mass loss (mg), ρ is the density of the materials (g/cm 3 ), s is the eroded area (1 cm 2 in this study), Δ T is the interval time (h), MDE in μm and MDER in μm/h. The CE resistance R e (h μm −1 ) is the reciprocal of MDER.…”

“…Cavitation erosion (CE) is a common damage form relative to pumps, turbines, propellers, valves and other flow passage components in both corrosive media and noncorrosive media, [1][2][3][4][5] usually occurs when the flowing speed of a liquid increases and pressure varies at the solid-liquid interface. It is believed that CE damage mainly results from repeated attack of stress pulses generated in collapsing of bubbles near the solid-liquid interface in the form of microjets or shock waves.…”

Effect of micro-particles on cavitation erosion behavior of 2Cr3WMoV steel

“…Cavitation erosion is the result of cavitation and almost can happen in any kind of fluid machinery; bubbles generated by the cavitation will block the flow channel, destroy the flow and cause vibration and noise. The cavitation erosion process seriously harm the safe and stable operation of the system (Lah, 2019; Xie et al , 2021). The pressure variation between different parts of the fuel pump system is large, which is easy to cavitation damage, affecting the safe and stable operation.…”

Effect of variation of WC reinforcement on metallurgical and cavitation erosion behavior of microwave processed NiCrSiC-WC composites clads

“…The correlation between mechanical parameter and phase transformation parameter has been established. Xie et al 18 Laser cladding Q235 steel FeCoCrNiMo x B 0.2 (x = 0, 0.5, 1)…”