Issue 50

G.V. Seretis et alii, Frattura ed Integrità Strutturale, 50 (2019) 517-525; DOI: 10.3221/IGF-ESIS.50.43 521 Figure 3 : Main effect plots for UTS for a , T 1 and h 1 factors. Figure 4 : Main effect plots for flexural strength for a , T 1 and h 1 factors. Source dF Sum of squares Mean square F-value P value C (%) A: Heating Rate [ o C/min] 4 661.7 165.4 0.51 0.73 9.23 B: Temperature [ o C] 4 423,2 105,8 0.31 0.865 5.9 C: Time [h] 4 2235 558.6 2.26 0.098 31.18 Table 3 : ANOVA results for tensile tests without interaction, * Significant at 95% confidence level. Source dF Sum of squares Mean square F-value P value C (%) A: Heating Rate [ o C/min] 4 2644 661 0.54 0.711 9.68 B: Temperature [ o C] 4 8925 2231.2 2.43 0.082 32.67 C: Time [h] 4 5004 1251 1.12 0.374 18.32 Table 4 : ANOVA results for flexural tests without interaction, * Significant at 95% confidence level. Parameter Optimal Parameters A 3 B 5 C 1 Experimental Predicted UTS (MPa) 214.65 218.848 Error % 1.95 % Table 5 : Confirmation table for optimum tensile performance.