Issue 30

A. Martín-Meizoso et alii, Frattura ed Integrità Strutturale, 30 (2014) 14-22; DOI: 10.3221/IGF-ESIS.30.03 20 0 0.05 0.1 0.15 0.2 -2000 -1500 -1000 -500 0 0 200 400 600 800 1000 1200 Engineering STRAIN Mid-Distance from Flame cut (microns) Engineering STRESS (MPa) 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 0 200 400 600 800 1000 1200 Engineering STRAIN Engineering STRESS (MPa) Figure 9 : Evolution of engineering stress vs. engineering strain as a function of distance from oxy-fuel cut edge, for middle thickness location of cut edge. Fig. 10 represents the evolution of mechanical strength parameters (yield stress, ultimate tensile stress…) vs. distance from the oxy-fuel cut, for the middle thickness location. Fig. 11 shows the evolution of the maximum uniform strain (until necking) and fracture strain vs. distance from the oxy- fuel cut, at the same middle location. Fig. 12 shows the evolution of the strain hardening index vs. distance from cut, for the three studied locations: 2.5 mm below the top surface, at the middle of the cut edge thickness and 2.5 mm above the exit side. 0 500 1000 1500 2000 2500 3000 3500 0 300 600 900 1200 1500 1800 2100 2400 Strength&Hardness (MPa) Mid‐distancefromOXYFUELcut (microns) 4‐25‐F‐T Vicker'sHardness05 SoHollomon's fitting SinfVoce's fitting UltimateTensileStrength Yieldstrength0.2% SoVoce's fitting 0 500 1000 1500 2000 2500 3000 0 300 600 900 1200 1500 1800 2100 2400 Strength&Hardness (MPa) Mid‐distancefromOXYFUELcut (microns) 4‐25‐F‐M Vicker'sHardness05 SoHollomon's fitting SinfVoce's fitting UltimateTensileStrength Yieldstrength0.2% SoVoce's fitting 0 500 1000 1500 2000 2500 3000 0 300 600 900 1200 1500 1800 2100 2400 Strength&Hardnes (MPa) Mid‐distancefromOXYFUELcut (microns) 4‐25‐F‐B Vicker'sHardness05 SoHollomon's fitting SinfVoce's fitting UltimateTensileStrength Yieldstrength0.2% SoVoce's fitting Figure 10 : Evolution of Vickers’ hardness (converted into MPa units), yield strength, ultimate tensile and other fitting parameters with MPa units, as a function of distance from oxy-fuel cut for the top, middle and bottom positions across the cut edge thickness.