The effect of cavitation erosion on austenitic-ferritic steel

• Autorzy: Krawczyk J. , Jasionowski R. , Ura D. , Goły M. , Frocisz Ł.

Identyfikatory

DOI

10.17402/310

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

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

• Wydawca: Wydawnictwo Naukowe Akademii Morskiej w Szczecinie
• Czasopismo: Zeszyty Naukowe Akademii Morskiej w Szczecinie
• Rocznik: 2018
• Tom: nr 56 (128)
• Strony: 30--35
• Opis fizyczny: Bibliogr. 16 poz., rys., tab

Twórcy

autor

Krawczyk J.

• AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science 30 Mickiewicza Av., 30-059 Kraków, Poland

autor

Jasionowski R.

• aritime University of Szczecin, Faculty of Marine Engineering 1–2 Wały Chrobrego St., 70-500 Szczecin, Poland

autor

Ura D.

• AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science

autor

Goły M.

• AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science

autor

Frocisz Ł.

• AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science

Bibliografia

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• 13. Mochizuki, H., Yokota, M., Sugiyama, K., Kisimoto, M. & Hattori, S. (2008) Cavitation erosion resistance of austenitic-ferritic duplex stainless steel. Transactions of the Japan Society of Mechanical Engineers Series A 74 (740), pp. 605–610.
• 14. Rede, V. & Grilec, K. (2009) Microstructural transformations of a duplex steel weld and their influence on the particle and cavitation erosion resistance. Strojarstvo 51 (6), pp. 613–621.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).