OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 4 2023 utilizing the Vickers microhardness of the erodible material and following the guidelines stated in [36], while E90 is a tuned coefficient. Table 2 and figs. 9, 10 present a study of E90 and k3 coefficients’ influence, The calculated erosion rate termed “ER sim” is compared with the experimental “ER exp” from two identical experiments. k3 is a coefficient by the normalized diameter, while it is obvious that k2, being a factor by normalized velocity, and angle function would be influential. Ta b l e 1 DNV model coefficients A1 A2 A3 A4 A5 A6 A7 A8 9.37 42.295 110.864 175.804 170.137 98.398 31.211 4.17 Ta b l e 2 The effect of Oka parameters No. Oka ER sim E90 HV (GPa) n1 n2 k2 k3 Dref Velref 1 6.154e-4 0.35 0.613 6.439 2.21 0.19 0.00326 104 6.322e-4 2 3.077e-4 0.35 0.613 6.439 2.21 0.19 0.00326 104 3.161e-4 3 9.231e-4 0.35 0.613 6.439 2.21 0.19 0.00326 104 1.057e-3 4 6.154e-4 0.35 0.613 6.439 2.21 0.16 0.00326 104 6.88e-4 5 6.154e-4 0.35 0.613 6.439 2.21 0.21 0.00326 104 5.977e-4 6 4e-3 0.35 0.613 6.439 2.21 0.19 0.00326 104 4.239e-3 7 8e-3 0.35 0.613 6.439 2.21 0.19 0.00326 104 8e-3 8 5e-3 0.35 0.613 6.439 2.21 0.19 0.00326 104 5.046e-3 ER exp 4.43e-03 3.16e-03 Fig. 9. The effect of E90 coefficient Fig. 10. The effect of k3 coefficient
RkJQdWJsaXNoZXIy MTk0ODM1