Zum Einfluß eines wäßrigen Mediums auf die Simulation von Erosion und Erosionskorrosion

Abstract

Die Untersuchung der Rolle eines Mediums bei erosiv-korrosiver Beanspruchung erfordert, dal3 die mechanische Kornponente der Beanspruchung bei erosiver und bei erosiv-korrosiver Arbeitsweise vergleichbar bleibt. Einige Experimente gaben jedoch Hinweise darauf, daB die Zugabe waBriger Medien zum Teilchenstrahl zu Veranderungen des Beanspruchungsregimes fiihrt.Mit der vorliegenden Arbeit wird die Medieneinwirkung auf den Abwurfwinkel, die Strahlgeometrie und Partikelverteilung und den Auftreffimpuls mit verschiedenen Methoden analysiert.For the investigation of the role of a medium in erosive-corrosive treatment it is necessary to keep comparablc the mechanical component of the attack of both the erosive and the erosivecorrosive mode of treatment. However, some recent results pointed to changes in the regime of erosive attack by addition of an aqueous medium to the particle stream.The aim of the present paper is to analyse by different methods the influences of the aqueoub medium on the angle of particle drop-out, the geometry of the particle stream and the particle distribution therein and the impulse of impingement.

Abrasive and Adhesive Wear Behavior of Arc-Evaporated Al1−x CrxN Hard Coatings

“…It can thus be concluded that at elevated temperatures, after a given running-in sliding distance, needed for covering the surface with transferred ball material, the COF is predominately defined by the tribo-system of ball against ball material transferred to the coating. The rising ball wear with increasing temperatures can be attributed to an accompanied softening of the austenite and martensite phases, where the latter are known to be formed in dry sliding contacts due to austentite/martensite transformation [25][26][27][28].…”