Our research program focuses on understanding the basic processes controlling the mechanical response of materials exposed to extreme conditions. Particular programs include the mechanisms of strain transfer across interfaces, dynamics of deformation and fracture in aggressive and non-aggressive environments, superplasticity, deformation mechanisms under extreme conditions, and deformation in nanograined materials. A common theme among these areas is that the experiments are performed in situ in the transmission electron microscope. This approach provides information in real time at high spatial and temporal resolution. Molecular dynamics computer simulations are used to provide insight at the atomistic level to the dynamic interaction of dislocations with obstacles. This information is then used as the foundation for developing predictive plasticity models.
Video Clips:
Nanograin Gold Growth Experiment Video
Al3Sc-Dislocation Interactions at 400oC
Twining Effect on Grain Growth I
Twining Effect on Grain Growth II
Twining Effect on Grain Growth III
Twining Effect on Grain Growth IV
Abnormal Grain Growth in PLD Ni I
Abnormal Grain Growth in PLD Ni II
