Abstract
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 P h (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 P h (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 P h = 13 kW and circular nozzle diameter d = 1.321 mm is 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.
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Acknowledgements
This work was supported by the Slovak Research and Development Agency under Contract No. APVV-207-12, APVV-15-0700, KEGA 039TUKE-4/2017 - Transfer of Knowledge from Research of Welding the Creep Resistant Steel into the Study Branch Progressive Technologies and VEGA 1/0682/17 - Research, Development and Experimental Verification of Tool Prototype for Forming Rifled Tubes. The experiments were conducted with the support of the Institute of Clean Technologies for Mining and Utilization of Raw Materials for Energy Use - Sustainability Program, reg. no. LO1406 financed by Ministry of Education, Youth and Sports of the Czech Republic, and with support for the long-term conceptual development of the research institution RVO: 68145535.
Funding
This work was supported by the Slovak Research and Development Agency under Contract No. APVV-207-12, KEGA 039TUKE-4/2017 - Transfer of Knowledge from Research of Welding the Creep Resistant Steel into the Study Branch Progressive Technologies and VEGA 1/0682/17 - Research, Development and Experimental Verification of Tool Prototype for Forming Rifled Tubes. The experiments were conducted with the support of the Institute of Clean Technologies for Mining and Utilization of Raw Materials for Energy Use - Sustainability Program, reg. no. LO1406 financed by Ministry of Education, Youth and Sports of the Czech Republic, and with support for the long-term conceptual development of the research institution RVO: 68145535.
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Lehocká, D., Klich, J., Botko, F. et al. Pulsating water jet erosion effect on a brass flat solid surface. Int J Adv Manuf Technol 97, 1099–1112 (2018). https://doi.org/10.1007/s00170-018-1882-4
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DOI: https://doi.org/10.1007/s00170-018-1882-4