Algorithms for Nanoindentation Strain Rate Jump Testing and Analysis

Background Understanding the dynamics of deformation processes is of interest for determining the dominant thermally activated processes during plasticity [ 1 ] and fracture [ 2 , 3 ]. Strain rate jump (SRJ) tests have been recently introduced to investigate intrinsic deformation mechanisms and have been successfully utilized on some nanomechanical test platforms [ 4 – 6 ]. Objective The goal is to create standardized SRJ testing and analysis protocols for Hysitron nanoindenters, which cannot be found in literature, besides our previous work [ 7 ]. Methods Presented here is software to create SRJ test load functions for the TI980, which could be adapted to other instruments, and standardized protocols for analyzing the associated data. Results These protocols are validated using single crystal tungsten as a model material and agree well with literature values from other instruments. Conclusions New freely available software, validated on single crystal tungsten, creates opportunities for others to investigate intrinsic deformation mechanisms in more complex systems.