Automated Ball Indentation (ABI) is a viable method for estimating the ductility, yield
stress, and ultimate stress, among other metrics, in different metallic materials. Currently, ABI
data analysis utilizes Hollomanโs Power Law to model the plastic region of the true stress-true
strain curve. While this formulation is accurate for some materials, its relevance for additively
manufactured austenitic stainless steels, such as 304L, needed investigation. The deviation of the
materialโs plastic behavior from the Power Law was investigated. In order to better model this
behavior, both the Voce and Ludwigson formulation were investigated. These formulations were
tested for both wrought and additively manufactured 304L stainless steel. Regression analysis was
used to choose the appropriate fit. The chosen formulation was then used to generate a material
model to simulate the ABI process. These simulations were validated through experimental
analysis.Mechanical Engineerin
