The yield strength dependence on strain rate was studied for molybdenum-alloy nanofibers
with varying initial dislocation density at three different pre-strain levels. In-situ tensile
experiments at three displacement rates were carried out in a scanning electron microscope.
Yield strength and its scatter decreased as a function of the pre-strain level for different
displacement rates. A statistical model was used to analyze the results, and a negative strain
rate dependence was inferred from the yield experiments. This finding suggests the need for …