Pulsating water jet erosion effect on a brass flat solid surface

0490264 - ÚGN 2019 RIV GB eng J - Článek v odborném periodiku
Lehocká, Dominika - Klich, Jiří - Botko, F. - Foldyna, Josef - Hloch, Sergej - Kepič, J. - Kovaľ, K. - Krejčí, L. - Storkan, Z.
Pulsating water jet erosion effect on a brass flat solid surface.
International Journal of Advanced Manufacturing Technology. Roč. 97, 1-4 (2018), s. 1099-1112. ISSN 0268-3768. E-ISSN 1433-3015
Grant CEP: GA MŠMT(CZ) LO1406
Institucionální podpora: RVO:68145535
Klíčová slova: pulsating water jet * brass * erosion
Obor OECD: Mechanical engineering
Impakt faktor: 2.496, rok: 2018
https://link.springer.com/article/10.1007/s00170-018-1882-4

The present study is focused on the disintegration effect of ultrasound-enhanced pulsating water jet (PWJ) technology on brass
CW614N. The first part of the study discusses the effect of a combination of factors based on the full factorial design of
experiments (DoE) 33. Traverse speed v (mm s−1), circular nozzle orifice diameter d (mm), and hydraulic power Ph (kW) are
selected as the disintegration variable factors. Mass material removal Δm (mg s−1) is evaluated based on the change in these
variable factors. In the next part, a verification experiment is performed with by varying the traverse speed between 0.2 and
1.4 mm s−1. The mathematical model calculated in DoE is confirmed. Moreover, the significant effect of hydraulic power Ph
(kW) on the efficiency of the PWJ disintegration is demonstrated. The last part of the study discusses the surface and subsurface
effects on a PWJ after brass CW614A erosion. A sample disintegration with hydraulic power Ph = 13 kW and circular nozzle
diameter d = 1.321mmis observed. Optical profilometry and scanning electron microscopy are performed to visualise the surface
erosion of a selected groove. A significant mass material removal is observed from the groove surface, and the disintegrated
surface is characterised by erosion and crater formation. A slight cold deformation with a maximum depth of 200 μm is detected
in the subsurface layer. The experiment and results present a part of an extensive research focused on describing the PWJ
disintegration efficiency for metallic materials.
Trvalý link: http://hdl.handle.net/11104/0284526