Integrated Computational Materials, Process and Product Engineering – IC-MPPE 2022

An appealing idea to material scientists is to characterize the flow behavior of materials with minimal experimental effort while guaranteeing highly reliable results. Nanoindentation is one candidate technique to achieve this objective. Although established as standard method to extract hardness and Young’s modulus, the technique is not yet fully exploited regarding the determination of localized flow curves, since understanding the correlations between mechanical properties obtained by spherical indentation experiments and uniaxial data is extremely challenging. To correctly account for tip imperfections, a calibration procedures originating from fundamental geometrical considerations is applied. This sets the foundation for strain-rate controlled experiments and allows an experimental evaluation of the constraint factor in consideration of the mechanical properties and induced strain, which enables the extraction of reliable flow curves. These protocols are applied at room and elevated temperatures in order to demonstrate temperature effects on the work hardening behavior of different metal microstructures.