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Effect of Frequency Change During Pulsed Waterjet Interaction with Stainless Steel

  • Madhulika Srivastava
  • Sergej Hloch
  • Miroslav Muller
  • Monika Hromasová
  • Jaromír Cais
  • Somnath Chattopadhyaya
  • Amit Rai Dixit
  • Jiří Klich
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

In the present work a detailed effect of pulsating water jet treatment with the variation of standoff distance on the flat austenitic stainless steel surface has been studied. During the experimentation, at a traverse speed of 30 mm/s accidently the change in frequency was encountered in the repeated test (under same treatment condition) which has been reported in this work. The frequency was changed from f = 20.11 kHz to f = 20.27 kHz during the treatment process at the pressure of p = 70 MPa with variation in standoff distance was increased from z = 5 mm up to z = 101 mm (with step distance of 2 mm between successive standoff distance). The change in microstructural topography of the treated surface under the above-mentioned conditions was observed using scanning electron microscopy (SEM). The strengthening mechanism on the surface and sub-surface region due to the plastic deformation phenomenon caused by the impact of the pulsating jet was evaluated by Vickers microhardness test. The micro hardness test was conducted along the depth of the treated region to analyze the effects in the sub-surface layers. Also, the erosion stages at different standoff distance was evaluated by scanning the surface by optical MicroProf FRT profilometer in order to analyze the nature of erosion phenomenon with the variation of standoff distance and frequency during the treatment process. The results obtained indicates that the change in frequency of the pulsations and the variation in standoff distance has a significant impact on the surface integrity of the treated material. As compare to the untreated surface the hardness of the treated surface was increased up to a certain depth and the higher frequency of pulsations has shown better improvement in the hardness values. The above observations elaborated the effect of an important parameter frequency and standoff distance for better and effective utilization of the technology for the surface treatment application.

Keywords

Ultrasonic Pulsed Water jet Erosion Integrity Micro hardness Stainless steel Non-Abrasive water jet 

Notes

Acknowledgements

This work was supported by VEGA 1/0096/18 and the joint collaborations of the Indian Institute of Technology (Indian School of Mines), Dhanbad, India, and the Institute of Geonics of the Czech Academy of Sciences, Ostrava- Poruba, Czech Republic. The experiments were conducted at the Institute of Geonics of the Czech Academy of Sciences, Ostrava- Poruba, Czech Republic, 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 the support for the long-term conceptual development of the research institution RVO: 68145535.

Abbreviations and Symbols

p

-pressure [MPa]

v

-traverse speed [mm.s −1]

f

-frequency [kHz]

d

-diameter of nozzle [mm]

z

-standoff distance [mm]

SEM

-scanning electron microscopy

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Madhulika Srivastava
    • 1
  • Sergej Hloch
    • 2
    • 3
  • Miroslav Muller
    • 4
  • Monika Hromasová
    • 4
  • Jaromír Cais
    • 5
  • Somnath Chattopadhyaya
    • 1
  • Amit Rai Dixit
    • 1
  • Jiří Klich
    • 3
  1. 1.Indian Institute of Technology (Indian School of Mines)DhanbadIndia
  2. 2.Faculty of Manufacturing Technologies TUKE with the seat in PrešovPresovSlovakia
  3. 3.Institute of Geonics of the CAS, Studentska 1768OstravaCzech Republic
  4. 4.Czech University of Life Sciences PraguePragueCzech Republic
  5. 5.Jan Evangelista Purkyne UniversityÚstí nad LabemCzech Republic

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