Influence of the material properties upon liquid cavitation resistance

Abstract

The influence of the liquid cavitation on the elements of fluid‐flow machines can be removed in either an active or passive way. In this paper possibilities of reduction of the cavitation effect on the constructional materials in a passive way are described. Different methods of the material erosion wear description, depending on its properties, are discussed. A mathematical model, regarding the principal mechanical features of the material, is proposed. The mathematical model shows the relation between cavitation resistance of the material and its properties. The effect of principal properties of the material on its resistance on the liquid cavitation influence based on this model is discussed.

Effect of heat treatment on the cavitation erosion resistance of stainless steel

“…High CER is occupied by the material with high reversible indentation work since it absorbs less plastic energy as suffering from the impact of cavitation bubble collapse . Based on the correlations between various mechanical parameters and CER obtained from experiments, a mathematic model was developed to assess material's CER with the knowledge of certain mechanical parameters of interests . Those mechanical parameters that can be used as indicators are desirable in selecting the high resistant material and predicting the lifetime of mechanical equipment in cavitation erosive environment.…”

“…It is well known that mechanical parameters are related to cavitation erosion resistance for metallic materials. [10] The most extensively discussed parameter is hardness, which has been demonstrated to correlate closely with CER for stainless steel. [11] Others argued that compressive strength and fracture strain are two important parameters for depicting the variation of the CER of Fe-based steel.…”

“…[14] Based on the correlations between various mechanical parameters and CER obtained from experiments, a mathematic model was developed to assess material's CER with the knowledge of certain mechanical parameters of interests. [10] Those mechanical parameters that can be used as indicators are desirable in selecting the high resistant material and predicting the lifetime of mechanical equipment in cavitation erosive environment. Heat treatment leads to the variation of mechanical properties, but as for whether similar correlations exist between mechanical parameters and cavitation erosion resistance, knowledge is far from sufficient so far.…”

“…It is well known that mechanical parameters are related to cavitation erosion resistance for metallic materials . The most extensively discussed parameter is hardness, which has been demonstrated to correlate closely with CER for stainless steel .…”