In tensile testing and sheet metal forming, postuniform elongation refers to the localized deformation or necking that happens after the material passes its ultimate tensile strength. During this phase, the cross-sectional area decreases rapidly until fracture occurs. Engineers measure this to understand a material's ductility limits under severe strain.
Heard on the job
The blank failed during the draw, likely because the postuniform elongation was too low to handle the die radius.