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

Article

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

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

Published/Copyright: November 25, 2017

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From the journal International Journal of Materials Research Volume 108 Issue 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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https://doi.org/10.3139/146.111574

Keywords for this article

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