Austenitization temperature of these steels can be used as a control measure of the transformation characteristics. Paper analyses the cavitation behaviour of a steel subjected to solution treatment at a lower temperature (950 °C), after which a primary aging at 700 °C and a tempering at 450 °C, were applied. The cavitation tests were conducted on a vibratory facility with piezoelectric crystals, in conformity with the prescription given by the ASTM G32-2010 Standard. The variation curves of mass losses and their speed during the test period, along with the hardness measurements and metallographic examinations, explain the degradation mechanism of the surface at the impact of the cavitation bubbles from the hydrodynamic field.Keywords: 17-4 PH stainless steel, cavitation erosion, characteristic curves, microstructure
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