3. Small size experimental specimen testing

Examples of fracture toughness test with the use of miniature test specimens are going to be presented in this chapter. Results obtained on three experimental materials are shown here. Namely, RPV steel GOST 15Ch2NMFA with ferritic-martensitic microstructure, austenitic stainless steel EN X5CrNi18-10 (AISI 304) and Ti-Alloy Ti6Al4V produced by Additive Manufacturing (AM) technology are employed in this study. Ductile and brittle materials facture behavior is investigated here with the use of miniaturized specimens applying J-R curve and Master Curve assessment approaches.

As the assessment of the fracture toughness parameters requires also tensile test data as input parameters for the evaluation, determination of tensile properties with the use of miniature tensile test (M-TT) specimens is also demonstrated here.
