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Title
The effect of cavitation erosion on austenitic-ferritic steel

ISSN printed: 1733-8670, ISSN on-line: 2392-0378
Krawczyk, Janusz1; Jasionowski, Robert2; Ura, Daniel3; Goły, Marcin4; Frocisz, Łukasz5
URI: https://repository.am.szczecin.pl/handle/123456789/2508
2018-12-18
Cavitation is a one of many wear mechanisms which are related to the flow of liquid. It is one of the most destructive wear methods for stainless materials. The local changes in the pressure of the liquid stream related to the flow across the metal component cause straightening of the surface area, as well as its erosion and the formation of pits on the surface layer. The erosion value of cavitation is related to the material’s microstructure, the geometry of the element, the phase composition of the material and the surface roughness. In this paper the investigation of the cavitation process for duplex stainless steel has been performed. Samples examined in the first stages of the experiments were not significantly changed, but after a long time the hardness increase was very visible. The result of the cavitation was also cracking along the interphase boundaries, which resulted in the chipping of the material. One of the most important results was a description of the change in the wear mechanisms and its intensity during the cavitation exposure time. At first plastic micro deformation of the material’s surface occurred, then the plastic deformation increased significantly and after some time this resulted in erosion of the material and interfacial boundary decohesion; these two effects increased simultaneously. The last of the mechanisms was mechanical destabilization of the austenite, but the clear result of the mechanical destabilization of the austenite was only observed in the last sample. Martensitic transformation of the material changed the material’s mechanical properties, but for the stainless steels this resulted in electrochemical corrosion of the material, especially through the formation of an electrochemical potential between austenite and martensite.
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Title

The effect of cavitation erosion on austenitic-ferritic steel

Pages

30-35

Figures

10

Tables

1

ISSN printed

1733-8670

ISSN on-line

2392-0378

DOI

10.17402/310

Type

Original scientific article

Journal

56 Scientific Journals of the Maritime University of Szczecin, no. 56 / 2018

Publisher

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Copyright Holder

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Published

2018-12-18

Recieved

2018-09-08

Accepted

2018-11-29

Funding

No data

Keywords

material, plastic deformation, erosion wear, cavitation, austenite destabilization, duplex steel

URI:

https://repository.am.szczecin.pl/handle/123456789/2508

Language

English

Authors

Krawczyk, Janusz1; Jasionowski, Robert2; Ura, Daniel3; Goły, Marcin4; Frocisz, Łukasz5

Affiliation

1 AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science 30 Mickiewicza Av., 30-059 Kraków, Poland, jkrawcz@agh.edu.pl
2 Maritime University of Szczecin, Faculty of Marine Engineering 1–2 Wały Chrobrego St., 70-500 Szczecin, Poland,
3 AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science 30 Mickiewicza Av., 30-059 Kraków, Poland,
4 AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science 30 Mickiewicza Av., 30-059 Kraków, Poland,
5 AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science 30 Mickiewicza Av., 30-059 Kraków, Poland,

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