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Cavitation erosion resistance assessment and comparison of three francis turbine runner materials

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Cavitation erosion resistance assessment and comparison of three francis turbine runner materials. / Ylönen, Markku; Saarenrinne, Pentti; Miettinen, Juha; Franc, Jean-Pierre; Fivel, Marc; Nyyssönen, Tuomo.

In: Materials Performance and Characterization, Vol. 7, No. 5, 26.10.2018, p. 1107-1126.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Ylönen, M, Saarenrinne, P, Miettinen, J, Franc, J-P, Fivel, M & Nyyssönen, T 2018, 'Cavitation erosion resistance assessment and comparison of three francis turbine runner materials' Materials Performance and Characterization, vol. 7, no. 5, pp. 1107-1126. https://doi.org/10.1520/MPC20180015

APA

Ylönen, M., Saarenrinne, P., Miettinen, J., Franc, J-P., Fivel, M., & Nyyssönen, T. (2018). Cavitation erosion resistance assessment and comparison of three francis turbine runner materials. Materials Performance and Characterization, 7(5), 1107-1126. https://doi.org/10.1520/MPC20180015

Vancouver

Ylönen M, Saarenrinne P, Miettinen J, Franc J-P, Fivel M, Nyyssönen T. Cavitation erosion resistance assessment and comparison of three francis turbine runner materials. Materials Performance and Characterization. 2018 Oct 26;7(5):1107-1126. https://doi.org/10.1520/MPC20180015

Author

Ylönen, Markku ; Saarenrinne, Pentti ; Miettinen, Juha ; Franc, Jean-Pierre ; Fivel, Marc ; Nyyssönen, Tuomo. / Cavitation erosion resistance assessment and comparison of three francis turbine runner materials. In: Materials Performance and Characterization. 2018 ; Vol. 7, No. 5. pp. 1107-1126.

Bibtex - Download

@article{8079ebc604f546189ca07b893706f9d9,
title = "Cavitation erosion resistance assessment and comparison of three francis turbine runner materials",
abstract = "Cavitation erosion is the most important erosion mechanism in Francis turbine runner blades. For this reason, knowledge of a material’s ability to resist cavitation is important in defining how suitable it is for use in a Francis turbine. In this study, three Francis turbine materials were subjected to cavitation erosion in a high-speed cavitation tunnel. One of the materials was a low-alloy steel, and the other two were stainless steels. The cavitation tunnel produced an annular cavitation field on one face of a cylindrical specimen. The test specimens underwent cavitation erosion until the erosion had reached a maximum penetration depth of about 0.5 mm. The material surface profiles were measured at regular intervals to calculate volume and mass loss. These losses were compared to those of several other materials that had undergone the same tests with the same setup and operational parameters. The materials were compared according to their steady-state erosion rates. The steady-state erosion rate represents a material’s ability to resist cavitation erosion once cavitation damage has already started to develop. The low-alloy steel eroded four times faster than the two stainless steels. One of the stainless steels tested here (Stainless steel 1) had the lowest erosion rate, along with another previously tested stainless steel. The other stainless steel (Stainless steel 2) had a slightly greater erosion rate than the first, falling into the same class as other lower-grade stainless steels and a nickel aluminum bronze alloy. The results show that in choosing a turbine blade material, stainless steels outperform nonstainless ones. The choice of which type of stainless steel to use is significant in turbines with cavitation problems. The eroded surfaces were analyzed with scanning electron microscopy in order to study the erosion mechanisms, and these studies showed that most of the damage is probably due to low-cycle fatigue.",
author = "Markku Yl{\"o}nen and Pentti Saarenrinne and Juha Miettinen and Jean-Pierre Franc and Marc Fivel and Tuomo Nyyss{\"o}nen",
year = "2018",
month = "10",
day = "26",
doi = "10.1520/MPC20180015",
language = "English",
volume = "7",
pages = "1107--1126",
journal = "Materials Performance and Characterization",
issn = "2379-1365",
number = "5",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Cavitation erosion resistance assessment and comparison of three francis turbine runner materials

AU - Ylönen, Markku

AU - Saarenrinne, Pentti

AU - Miettinen, Juha

AU - Franc, Jean-Pierre

AU - Fivel, Marc

AU - Nyyssönen, Tuomo

PY - 2018/10/26

Y1 - 2018/10/26

N2 - Cavitation erosion is the most important erosion mechanism in Francis turbine runner blades. For this reason, knowledge of a material’s ability to resist cavitation is important in defining how suitable it is for use in a Francis turbine. In this study, three Francis turbine materials were subjected to cavitation erosion in a high-speed cavitation tunnel. One of the materials was a low-alloy steel, and the other two were stainless steels. The cavitation tunnel produced an annular cavitation field on one face of a cylindrical specimen. The test specimens underwent cavitation erosion until the erosion had reached a maximum penetration depth of about 0.5 mm. The material surface profiles were measured at regular intervals to calculate volume and mass loss. These losses were compared to those of several other materials that had undergone the same tests with the same setup and operational parameters. The materials were compared according to their steady-state erosion rates. The steady-state erosion rate represents a material’s ability to resist cavitation erosion once cavitation damage has already started to develop. The low-alloy steel eroded four times faster than the two stainless steels. One of the stainless steels tested here (Stainless steel 1) had the lowest erosion rate, along with another previously tested stainless steel. The other stainless steel (Stainless steel 2) had a slightly greater erosion rate than the first, falling into the same class as other lower-grade stainless steels and a nickel aluminum bronze alloy. The results show that in choosing a turbine blade material, stainless steels outperform nonstainless ones. The choice of which type of stainless steel to use is significant in turbines with cavitation problems. The eroded surfaces were analyzed with scanning electron microscopy in order to study the erosion mechanisms, and these studies showed that most of the damage is probably due to low-cycle fatigue.

AB - Cavitation erosion is the most important erosion mechanism in Francis turbine runner blades. For this reason, knowledge of a material’s ability to resist cavitation is important in defining how suitable it is for use in a Francis turbine. In this study, three Francis turbine materials were subjected to cavitation erosion in a high-speed cavitation tunnel. One of the materials was a low-alloy steel, and the other two were stainless steels. The cavitation tunnel produced an annular cavitation field on one face of a cylindrical specimen. The test specimens underwent cavitation erosion until the erosion had reached a maximum penetration depth of about 0.5 mm. The material surface profiles were measured at regular intervals to calculate volume and mass loss. These losses were compared to those of several other materials that had undergone the same tests with the same setup and operational parameters. The materials were compared according to their steady-state erosion rates. The steady-state erosion rate represents a material’s ability to resist cavitation erosion once cavitation damage has already started to develop. The low-alloy steel eroded four times faster than the two stainless steels. One of the stainless steels tested here (Stainless steel 1) had the lowest erosion rate, along with another previously tested stainless steel. The other stainless steel (Stainless steel 2) had a slightly greater erosion rate than the first, falling into the same class as other lower-grade stainless steels and a nickel aluminum bronze alloy. The results show that in choosing a turbine blade material, stainless steels outperform nonstainless ones. The choice of which type of stainless steel to use is significant in turbines with cavitation problems. The eroded surfaces were analyzed with scanning electron microscopy in order to study the erosion mechanisms, and these studies showed that most of the damage is probably due to low-cycle fatigue.

U2 - 10.1520/MPC20180015

DO - 10.1520/MPC20180015

M3 - Article

VL - 7

SP - 1107

EP - 1126

JO - Materials Performance and Characterization

JF - Materials Performance and Characterization

SN - 2379-1365

IS - 5

ER -