Experimental Evidence for the Use of the Gauss Function in the Functional Description of the Ductile-Brittle Transition of Ferritic Steels

In the functional description of the ductile-brittle transition of ferritic steels, the authors assumed in an earlier paper that the increase of material fracturing in the ductile fracture mode with the increase of temperature follows a Gauss distribution function. In this paper, evidence is presented that justifies this assumption for the pressure vessel steel 20 MnMoNi 55 (A533 B Cl.1).