JURCHELA Alin Dan “Politehnica” University of Timisoara

Spoluautoři BORDEASU Ilare, MITELEA Ion, OANCA Octavian

Cavitation erosion is a complex phenomenon implying numerous hydrodynamic, mechanical, metallurgical and chemical factors. As a result, the researches destined to obtain new materials, with improved behavior, must be interdisciplinary and depends on the understanding the correlations between chemical composition, microstructure and, of course, the cavitation intensity parameters. The work investigate the role of casting obtained microstructures upon the cavitation erosion resistance of the stainless steels with 12% of chromium and various nickel contents (2…10% Ni). The microstructure differences occur as a result of the nickel gammagene action upon the transformation stability for under cooled austenite. The cavitation erosion tests were realized with two ultrasonic vibratory facilities. To reveal the microstructure modifications metallographic techniques were used The performances of the investigated stainless steels were compared with those of the OH12NDL steel used, in the past, for manufacturing numerous Romanian hydro energetic equipments.

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