Evaluation of the Cavitation Resistance of INCONEL 718, in Delivered and Respectively Heat Treated Condition

Abstract:

Inconel 718 is a very difficult metal for machining because of its high plasticity. Lately, more and more researchers are interested in using it for cavitation parts, such as the plugs and drawers of the valves. For this purpose, thermal volumetric treatments have been initiated to facilitate mechanical machining, aiming simultaneously to obtain good compression and cavitation resistance results. Therefore, this paper presents the results of cavitation erosion behavior and cavitation resistance of ICONEL 718, subjected to two thermal treatment regimes, differentiated by the duration (temperature 800 °C and residence times 5 hours, and respectively 10 hours). The assessment of the cavitation resistance provided by each heat treatment regime is based on the average durability cavitation parameter, as defined by K. Steller. The research is achieved by using the standard vibrator device with piezo - ceramic crystals from the Cavitation Laboratory of the Politechnica University of Timisoara.

• Periodical: Advanced Materials Research (Volume 1157)
• Pages: 47-51
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1157.47
• Online since: February 2020
• Authors: Cornelia Laura Salcianu*, Ilare Bordeasu, Nicuşor Alin Sîrbu, Rodica Bădărău, Gabriel Mălaimare, Mihai Hluscu, Daniel Ostoia, Octavian Victor Oancă
• Keywords: Average Durability Cavitation Parameter, Cavitation, Heat Treatment, Hydraulic Machine Blades, Stainless Steel

References

[1] Bordeaşu I 2006 Eroziunea cavitaţională a materialelor, Editura Politehnica, Timişoara, Romania.

[2] Bordeasu I, Popoviciu M O, Ghera C, Micu, L M, Pirvulescu L D and Bena T 2017 The use of Rz roughness parameter for evaluation of materials behavior to cavitation erosion, International Conference on Applied Sciences (ICAS2017), IOP Conf. Series: Materials Science and Engineering 294 (2017) 012020.

DOI: 10.1088/1757-899x/294/1/012020

[3] Lazar I, Bordeasu I, Popoviciu M O, Bena T and Micu M L 2018 Considerations regarding the erosion mechanism of vibratory cavitation, KOD. 2018, IOP Conf. Series: Materials Science and Engineering 393 012040.

DOI: 10.1088/1757-899x/393/1/012040

[4] ***2010 Standard method of vibratory cavitation erosion test, ASTM, Standard G32.

[5] Mitelea I, Ghera C, Bordeasu I and Carciunescu C M 2015 Ultrasonic cavitation erosion of a duplex treated 16MnCr5 steel, International Journal of Materials Research, Vol. 6, Issue 4, pp.391-397.

DOI: 10.3139/146.111188

[6] Mitelea I, Micu L M, Bordeasu I and Craciunescu C M 2016 Cavitation Erosion of Sensitized UNS S31803 Duplex Stainless Steels, Journal of Materials Engineering and Performance, Vol.25, Issue 5 pp.1939-1944.

DOI: 10.1007/s11665-016-2045-0

[7] Micul L M, Bordeasu I and Popoviciu M O 2017 A New Model for the Equation Describing the Cavitation Mean Depth Erosion Rate Curve, Rev. Chim. (Bucharest), vol. 68, Issue 4, pp.894-898.

DOI: 10.37358/rc.17.4.5573

[8] Bordeaşu I., ş.a., 2004 An Analytical Model for the Cavitation Erosion Characteristic Curves, Scientific Bulletin Politehnica, University of Timişoara, Transaction of Mechanics, Tom 49(63), ISSN:1224-6077, Timişoara, pp.253-258.

[9] Steller J K 1992 International cavitation erosion test – test facilities and experimental results, 2 – emes Journees Cavitation, March, Paris2.

[10] ***www.specialmetals.com/.../inconel_alloy_718.pdf.