Abstract
Nanostructured aluminum alloys are advantageous for their high strength properties and low density due to the presence of not only multiple material components, but also the presence of nanocrystalline grains that increase strength through grain boundary strengthening. Microstructural analysis is a crucial step in understanding alloy mechanical properties. The alloys observed in this research were analyzed through transmission electron microscope (TEM) observation and grain analysis to determine the average grain size of each nanocrystalline alloy and determine the distribution of grain sizes through each alloy. Average grain sizes for the alloys, found through number fraction analysis, ranged from 44nm to 624nm. Each alloy had a distribution of grain sizes, where the alloy contained high concentrations of grains close their respective average grain sizes with lower concentrations of grains further from the average size.