18Ni300 1 18ni300 1 3D printing 1 Additive manufacturing 1 Additives 1 Defect interactions 1 Defects 1 Digital image correlation 1 Digital image correlations 1 Ductility 1 Hardening 1 Image correlation 1 Local stress-strain 1 Maraging Maraging steel 1 Notch 1 Steel 1 Strain hardening 1 Strain hardening behavior 1 Strain measurement 1 Stress concentration 1 Stress concentration factors 1 Stress-strain curves 1 Stress-strain field 1 Tool steel 1 True stress strain curve 1