Elucidating the Role of Twin Boundaries in Deformation of Nanocrystalline Metals

//Elucidating the Role of Twin Boundaries in Deformation of Nanocrystalline Metals

Elucidating the Role of Twin Boundaries in Deformation of Nanocrystalline Metals

By | 2015-04-29T14:04:48+00:00 April 29th, 2015|Highlights - Energy Research|0 Comments

Authors

J.G. Brons, J.A. Hardwick, H.A. Padilla II, K. Hattar, G.B. Thompson, B.L. Boyce

Scientific Achievement

Simulation results suggest that twins don’t just facilitate a single mechanism (e.g. ‘detwinning’), but that they facilitate several separate mechanisms simultaneously.

Significance and Impact

Coupled experiment and modeling reveal the dramatic and complex impact of high-density twin boundaries on microstructure evolution and deformation mechanisms

Research Details

–Cryogenic nanoindentation reveals that high densities of twin boundaries leads to substantial low-temperature grain growth during deformation

–Novel analysis methods applied to LAMMPS MD simulations allow for the detailed quantification of both microstructural evolution and deformation modes as a function of initial structure.