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Research Papers: Applications

Cavitation Erosion Mechanisms of Solution Treated X5CrNi18-10 Stainless Steels

[+] Author and Article Information
I. Bordeaşu, L. Sălcianu

Department of Mechanical Machines,
Equipments and Transportation,
Politehnica University of Timisoara,
Timisoara 300006, Romania

I. Mitelea

Department of Materials and Manufacturing
Engineering,
Politehnica University of Timisoara,
Timisoara 300006, Romania

C. M. Crăciunescu

Department of Materials and Manufacturing
Engineering,
Faculty of Mechanical Engineering,
Politehnica University of Timisoara,
Timisoara 300006, Romania
e-mail: craciunescucm@yahoo.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 30, 2015; final manuscript received November 26, 2015; published online April 8, 2016. Assoc. Editor: Robert Wood.

J. Tribol 138(3), 031102 (Apr 08, 2016) (7 pages) Paper No: TRIB-15-1095; doi: 10.1115/1.4032489 History: Received March 30, 2015; Revised November 26, 2015

The cavitation erosion resistance of an X5CrNi18-10 stainless steel, solution treated at temperatures in the range of 1000–1100 °C for 5–50 mins, was investigated using a piezoceramic vibrating system. The variation of the technological parameters led to changes in the degree of the chemical homogeneity and the grain size of the austenite. Heating at 1050 °C for 25 mins, followed by water quenching, led to an increase in the cavitation erosion resistance of about 2.45 times compared to the samples heated for 50 mins. A significant improvement of the cavitation resistance was obtained for the sample maintained at 1050 °C compared to the samples annealed at 1000 and 1100 °C. It was found that the associated cavitation erosion resistance is improved for finer granulation and for higher degree of chemical homogeneity of the austenite.

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Figures

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Fig. 1

Optical microstructures of the X5CrNi18-10 sample solutions treated for 25 mins and water quenched for different heating temperatures: (a) 1000 °C/25 mins/water, (b) 1050 °C/25 mins/water, and (c) 1100 °C/25 mins/water. (Examples of grain growth are highlighted).

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Fig. 2

Optical microstructures of the X5CrNi18-10 sample solution treated at constant temperature (1050 °C) and different holding time (see also Fig. 1(b) for comparison): (a) 1050 °C/5 mins/water and (b) 1050 °C/50 mins/water

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Fig. 3

The influence of the solution annealing treatment parameters—(a) holding time: (a1) cumulative mass loss versus cavitation time and (a2) erosion rate versus cavitation time; (b) temperature: (b1) cumulative mass loss versus cavitation time and (b2) erosion rate versus cavitation time—on the cavitation erosion of X5CrNi18-10 stainless steel samples

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Fig. 4

Optical microstructures of the X5CrNi18-10 samples subjected to cavitation erosion for 165 mins. Solution treated for 25 mins and water quenched for different heating temperatures: (a) 1000 °C/25 mins/water, (b) 1050 °C/25 mins/water, and (c) 1100 °C/25 mins/water.

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Fig. 5

Optical microstructures of the X5CrNi18-10 cavitated samples for 165 mins. Solution treated at constant temperature (1050 °C) and different holding time (see also Fig. 4(b) for comparison): (a) 1050 °C/5 mins/water and (b) 1050 °C/50 mins/water.

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Fig. 6

The influence of the solution annealing parameters on the HV1 Vickers hardness of the X5CrNi18-10 stainless steel

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Fig. 7

Hardness gradients across the thickness of X5CrNi18-ten sample solution treated (1050 °C/25 mins/water) following the cavitation erosion tests

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