Application of intercritical heat treatment to improve toughness of SA508 Cl.3 reactor pressure vessel steel

Master curve characterization of the fracture toughness behavior in SA508 Gr.4N low alloy steels

“…The Weibull plots showed that the data distribution for the Gr. 3 steel was approximately within the theoretically predicted range. However, the datasets for the Gr.4N model showed had comparatively higher slopes, which mean smaller scatters of the measured fracture toughness data in low test temperatures.…”

“…For materials used for the RPV, sufficient strength and toughness are required to prevent failure against the operating conditions and the aging degradation of materials [1,2]. Various studies have focused on improving mechanical properties by the controlling heat treatment conditions and chemical composition of conventional RPV steel, SA508 Gr.3 Mn-Mo-Ni low alloy steels [3,4]. On the other hand, some research is currently being conducted to indentify new materials with higher strength and toughness for larger capacities and longer lifetimes of the nuclear power plants.…”

The effect of intercritical heat treatment on the mechanical properties of AISI 3115 steel

“…This morphology presents a number of unique properties (sometimes called dual-phase properties); a low 0.2% offset yield strength, a high tensile strength, a high work hardening rate, high toughness and no sharp yield point [7,8].…”

Hydrogen Reduction in MEP Niobium Studied by Secondary Ion Mass Spectrometry (SIMS)

“…Moreover, as the alloying element it is used in stainless steels, nickel-, cobalt-, zirconium-, and iron-based super-alloys which are used in aviation industry for jet engines components, rocket sub-assemblies, heat resistant, combustion equipment, etc. [2][3][4]. Niobium improves the strength of the alloys, especially at low temperatures.…”