Volume 4, Issue 1 (January 1976)
Correlating Models and Prediction of Erosion Resistance to Cavitation and Drop Impact
Using venturi and rotating disk data, correlations are established between volume loss rates obtained from different stages of volume loss-time curves and various single and multiple material properties. The significance of correlations and relationships is judged from various statistical parameters computed. The analysis indicates that during the initial and development phases hardness and shock compression ratio play a predominant role, and once the erosion develops modified resilience and tensile strength significantly influence the erosion phenomenon. For the correlations involving volume loss taken from the initial and development phases the statistical parameters exhibit considerable variation, while in the developed phase their variation is insignificant. Analyses of extensive erosion data from the authors' laboratory and from other laboratories indicate that groupings of properties like ultimate resilience × hardness (UH) and tensile strength × hardness (T,H) or groupings such as UHE and UHT, exhibit best correlations. Several equations are proposed to predict erosion rates of various materials tested in different laboratories.