Cavitation erosion of 17-4 PH stainless steels following sub-zero treatment

Ion Mitelea; Ilare Bordeaşu; Ştefan-Eusebiu Katona; Corneliu Marius Crăciunescu

doi:10.3139/146.111574

Artikel

Cavitation erosion of 17-4 PH stainless steels following sub-zero treatment

Ion Mitelea , Ilare Bordeaşu , Ştefan-Eusebiu Katona und Corneliu Marius Crăciunescu

Veröffentlicht/Copyright: 25. November 2017

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Aus der Zeitschrift International Journal of Materials Research Band 108 Heft 12

Abstract

The effect of sub-zero treatment on 17-4 PH stainless steels is analysed based on ultrasonic cavitation experiments conducted on a vibratory machine with piezoceramic crystals. The results prove that the proposed treatment (solution treatment + sub-zero cooling + tempering), favours a reduction, by about 40%, of the mean depth of erosion, and mean depth erosion rate after 165 min of erosion by vibratory cavitation, compared to the solution treatment. The improvement of the cavitation erosion behaviour is explained based on hardness, metallographic and X-ray diffraction analysis.

Keywords: Cavitation; Stainless steel; Sub-zero treatment; Cavitation erosion; Surface effects

*Correspondence address, Prof. Dr. Ing. Ion Mitelea, Department of Materials and Manufacturing Engineering, Politehnica University Timisoara, Romania, Bd. Mihai Viteazul 1, Timisoara 300006, Romania, Tel.: +40-256-403650, Fax: +40-256-403523, E-mail: ionel_mitelea@yahoo.com

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Received: 2017-05-12

Accepted: 2017-08-08

Published Online: 2017-11-25

Published in Print: 2017-12-08

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Artikel in diesem Heft

https://doi.org/10.3139/146.111574

Schlagwörter für diesen Artikel

Cavitation; Stainless steel; Sub-zero treatment; Cavitation erosion; Surface effects