The role of deformation mechanisms in flow localization of 316L stainless steel

Local mechanical properties of Alloy 82/182 dissimilar weld joint between SA508 Gr.1a and F316 SS at RT and 320°C

“…The ductility in the HAZ of F316 SS was lower than that in the Alloy 82/182 fusion area and comparable to that of the ferritic side HAZ. The loss of ductility in 316 SS near the operating temperature of NPPs has been observed in other studies; this has been explained by a mechanism involving the disappearance of twinning-induced hardening [17] and by the occurrence of DSA [15]. However, the mechanism of loss of ductility in the NPP operating temperature range is still unclear.…”

“…Since the PIS is strongly dependent on temperature but independent of the stress concentration and irradiation dose levels [17][18][19], its value is an inherent material property that represents the resistance of the local necking initiation [18]. It is also commonly used as a local failure criterion for ductile material [19].…”

Analysis of notch strengthening of 316L stainless steel with and without irradiation-induced hardening using EBSD and FEM

“…Twinning is activated in grains where the true stress is larger than the critical twinning stress of about 500-550 MPa. The details of the definition of critical twinning stress were published previously [16]. The size of the twinning zone is a good indicator of the degree of stress concentration.…”

Characterization of Austenitic Stainless Steels Deformed at Elevated Temperature

“…[24,29,32,38] Lin Peng et al [39] reported that plastic deformation in austenitic stainless steels occurs by planar slip, followed by formation of stacking faults and eventually multi-directional slipping. Only at higher plastic strains does twinning become the dominant deformation mechanism as grains that favor slip become exhausted.…”