Lightweighting of structural materials has proven indispensable in the energy economy,
predicated on alloy design with high strength-to-weight ratios. Modern aluminum alloys have …

The large fraction of material residing at grain boundaries in nanocrystalline metals and
alloys is responsible for their ultrahigh strength, but also undesirable microstructural …

Grain size engineering, particularly reducing grain size into the nanocrystalline regime,
offers a promising pathway to further improve the strength-to-weight ratio of Al alloys …

Decreasing microstructural length scales to the nanoscale is a proven way of increasing
strength, but the intrinsic metastability of such structures typically makes them susceptible to …

Strengthening of metals through nanoscale grain boundaries and coherent twin boundaries
is manifested by a maximum strength—a phenomenon known as Hall–Petch breakdown …

Increasing the strength of metallic alloys while maintaining formability is an interesting
challenge for enabling new generations of lightweight structures and technologies. In this …

Solute segregation to individual grain boundaries is used by design to produce strong and
stable nanocrystalline metallic alloys. Grain-boundary segregation, however, is known to …

In-spite of all of the unique properties of nanocrystalline materials, they are notorious when it
comes to their susceptibility to thermally induced grain coarsening, thus imposing an upper …

Alloying is often employed to stabilize nanocrystalline materials against microstructural
coarsening. The stabilization process results from the combined effects of …

Commonly used commercial cast aluminum alloys for the automotive industry are viable for
temperatures only up to 250° C, despite decades of study and development. Affordable cast …