Design and Realization of Structural Materials with High Strength and High Ductility

The research objective is to study the fundamental aspects of structural materials of high yield strength and yet high ductility. We will address the four key problems emerged when integrating the nanostructured materials for structural applications:the poor ductility of nanostructured materials and the difficulty to produce such the material at a large scale;to develop advanced numerical simulation tools based on MD (Molecular Dynamics), PF (Phase Field) and EFGM (element-free Galerkin method) for the study of the combination of two highly conflicting key mechanical properties: Strength and Ductility;to develop advanced experimental methods including in-situ mechanical testing in TEM, the multiscale mechanical testing using nanoindentation-based bending and compression tests for investigating the fundamental fracture mechanisms;to develop joining technology for nanostructured materials using pulsed laser welding, and to optimize the welding conditions for conserving the nanostructures and the strength of the nanostructured materials.