An investigation into the phenomenon of macroscopic plastic deformation localization in metals

Abstract Experimental and theoretical studies are combined to investigate the phenomenon of macroscopic plastic deformation localization in metallic tensile specimens AL6061, HSLA350 Q235. The longitudinal strain cross-section reduction at different instant during testing estimated through measurement technique three dimensional digital image correlation (3D-DIC). Ling weighted-average method referred as WAM is used compare true stress-strain relation obtained from experiment. A new mathematical model suggested estimate zone length, which a crucial parameter that can be anticipate behaviour metals past peak load. effect material property on necking length examined. experimental results show axial within non-uniform. It also found precisely derive stress steels Q235 but not AL6061. round Q235, HSLA350, AL6061 equals six, five, four times their initial diameter, respectively. Materials with higher fracture ratio ultimate have shorter length. This work provides insights into physical mechanism localization.