Applied Physics Letters
We present the results of repeated relaxation tests using nanoindentation to derive the activation volume of the dislocation velocity and the ratios of the dislocation density and dislocation velocity. An experimental technique, based on classical uniaxial relaxation experiments, was developed to establish a constant strain during repeated load relaxation transients and then to calculate the stiffness of unloading, and therefore the hardness, across the transients with acceptable results. We found that the activation volume of the dislocation velocity from our nanoindentation methodology was in good agreement when compared to the same reported for uniaxial experiments. © 2014 AIP Publishing LLC.
Original Publication Citation
Stegall, D. E., Mamun, M. A., Crawford, B., & Elmustafa, A. A. (2014). Repeated load relaxation testing of pure polycrystalline nickel at room temperature using nanoindentation. Applied Physics Letters, 104(4), 041902. doi:10.1063/1.4862799
Stegall, D. E.; Mamun, M. A.; Crawford, B.; and Elmustafa, A, A., "Repeated Load Relaxation Testing of Pure Polycrystalline Nickel at Room Temperature Using Nanoindentation" (2014). Mechanical & Aerospace Engineering Faculty Publications. 22.