Analytical and experimental analysis of indentation depth upon abrasive impact on metallic substrates

Abstract

Abrasive blasting is a prerequisite to any thermal spraying processes to make the substrate rough. Assessment of indentation depth after abrasive impact is essential to analyze the produced roughness. However, no analytical model on indentation depth after abrasive blasting is available. Most of the available erosion rate models did not consider the elastic recovery of the elastic-plastic substrate materials. Furthermore, the reported models utilized substrate hardness as the influencing parameter without considering the strain hardening effect. Therefore, a novel indentation depth model was developed considering elastic recovery of the substrate and Johnson-Cook flow strength. Thereafter, the developed model was validated using the experimental results. This model was found to be in good agreement with the experimental data. The Johnson-Cook flow strength of the material was found to be a more influencing parameter as compared to the hardness in connection with material behavior during abrasive blasting.