Investigation of tensile behavior of additive manufacturing Z2CN19-10 steel via single-stress small punch test

With the advancement of wire arc additive manufacturing (WAAM) technology, the use of WAAM materials has become increasingly widespread. However, these materials normally exhibit anisotropic characteristics, which pose significant challenges in the examination of their mechanical properties due to the limited volume of material available in some cases. Z2CN19-10 is newly developed to prevent corrosion cracking in nuclear power plants. This study investigated the tensile behavior of WAAM Z2CN19-10 steel using uniaxial tensile tests (UTTs), small punch tests (SPTs), and single-stress small punch tests (SS-SPTs). Additionally, the microstructure was characterized using metallographic microscopy (MM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD). The UTT results indicated that WAAM Z2CN19-10 steel exhibited significantly anisotropic in tensile elongation. Relationships between UTT and SS-SPT results were established to determine the tensile properties of WAAM Z2CN19-10 steel via SS-SPTs. Fracture surface analysis revealed that the morphologies of UTT and SPT specimens displayed distinctly different characteristics, while similarities were observed between UTT and SS-SPT specimens.