Indentation-based damage quantification revisited

Efforts to implement continuum damage models in forming simulations are hampered by the absence of experimental techniques to provide reliable and accurate damage-evolution parameters. The widely used indentation approach, whereby deformation-induced damage is quantified through the degradation of indentation hardness and modulus, was shown to be intrinsically deficient (Tasan et al. [18]). Here, a new indentation-based methodology is developed and evaluated, allowing damage-induced degradation of hardness and modulus as a reliable probe for damage quantification.