Issue 36

I. Camagic et alii, Frattura ed Integrità Strutturale, 36 (2016) 1-7; DOI: 10.3221/IGF-ESIS.36.01 5 Influence of testing temperature and exploitation period on the fatigue threshold  K th is graphically presented in Fig. 3-5, for PM, WM and HAZ, respectively. Fatigue threshold,  K th , MPa√m 0 100 200 300 400 500 600 0 3 6 9 Temperature, 0 C ▫  new PM ◦  exploited PM Figure 3 : Fatigue threshold ΔK th vs. temperature in PM Fatigue threshold,  K th , MPa√m 0 100 200 300 400 500 600 0 3 6 9 Temperature, 0 C Figure 4 : Fatigue threshold ΔK th vs. temperature in WM. Fatigue threshold,  K th , MPa√m 0 100 200 300 400 500 600 700 0 3 6 9 Temperature, 0 C ▫  new HAZ ◦  exploited HAZ Figure 5 : Fatigue threshold ΔK th vs. temperature in HAZ. The influence of testing temperature and exploitation period on the fatigue crack growth rate, da/dN, is graphically presented in Fig. 6-8, for PM, WM and HAZ, respectively.