Effect of Geometrical and Loading Parameters on Fatigue Crack Growth of Stainless Steel 316L

Abstract

For their high mechanical characteristic (capacity resistance, hardness and impact resistance), the stainless steels remain not easily replaceable materials. This material can be used in significant fields such as the nuclear power, the storage of the chemical products. This work presents fatigue crack growth of austenitic stainless steel 316L at constant amplitude loading. The double through crack at hole specimen is used where the influence of dimension of hole, maximum amplitude loading and stress ratio are studied. The Nasgro model was used to prevent the fatigue crack growth. The effect of the stress ratio is highlighted, where one notices a shift of the curves of crack growth. The increasing of dimension of hole and the maximum amplitude loading decrease the fatigue life. Different situations permit to select the optimized hole.

Residual stress effects on fatigue crack propagation in Butt–Welded joints for 304 stainless steel sheets

“…In Figure 4, the XFEM model for non-welded material has been verified using experimental and simulation data obtained by other researchers [16,17] for R = 0.1 and 0.25, respectively. In addition, the data were compared with the results obtained from the NASGRO model.…”

“…The mechanical properties of the investigated 304 stainless steel and fracture toughness parameters were based on the literature data [14]. However, the energy release rate constants c 3 and c 4 for different stress ratios R = 0.1 and R = 0.25 were checked with reference to [16,17], respectively, as these constants were not in [14]. The fatigue properties are listed in Table 2.…”

“…where DK 0 is the threshold stress intensity range and C th is the threshold coefficient. For constant amplitude loading, the parameter values of the NASGRO model are according to [17] and are listed in Table 3.…”