PSI - Issue 13

Luka Grubiša et al. / Procedia Structural Integrity 13 (2018) 430–437 Luka Grubiša, Darko Bajić, Tomaž Vuherer / Structural Integrity Procedia 00 (2018) 000 – 000

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Fig. 10. The results of instrumented Charpy impact test in weld metal - CH – WM

Fig. 11. The results of instrumented Charpy impact test in HAZ microstructure - CH-HAZ

Total energy for fracture was split into energy for initiation and energy for propagation shown in Fig.12 for weld metal as well as for HAZ microstructure.

100 120 140 160 180 200

189.73

CH – WM CH – HAZ

114.83

113.46

74.69

0 20 40 60 80

67.49

45.98

38.45

36.24

Impact toughness, J/cm2

Impact energy, J

Energy for initiation Ei, J

Energy for propagation Ep, J

Fig. 12. Comparative results for WM and HAZ

Total energy for fracture is higher in weld metal in comparison to HAZ microstructure. The difference between them is more than 50%. Furthermore, energy for initiation of weld metal is 40% higher than in HAZ microstructure,