A Critical Appraisal of the Instrumented Indentation Technique and Profilometry?Based Inverse Finite Element Method Indentation Plastometry for Obtaining Stress–Strain Curves

A comparison is presented between conventional tensile stress-strain curves and those obtained via two methodologies based on (spherical) indentation. The first, termed Instrumented Indentation Technique (IIT), involves conversion of load-displacement data to analytical expressions. This has been done using loads below 1 N (“nano”) in the kN range (“macro”). other procedure, profilometry-based indentation plastometry (PIP), repeated finite element method (FEM) simulation, residual indent profile as target outcome obtaining best fit set parameter values a constitutive law. macro scale only. from nano-IIT tend be very noisy variable, whereas macro-IIT are more reproducible less noisy. With one empirical formulations employed, agreement with experiment close being acceptable for work hardening characteristics, although inferred yield stress poor testing. In contrast this, PIP procedure provides outcomes that testing, concerning both hardening. causes this explored discussed.