Validation of interface accommodation as a ductility mechanism

Establish experimentally and computationally whether structural accommodation at heterophase interfaces—through interface broadening, roughening, and migration—causes improved macroscopic ductility in intermetallic-rich aluminum alloys.

Background

The simulations demonstrate structural evolution at three experimentally motivated interfaces, but they do not directly calculate macroscopic ductility, fracture, or damage evolution. The proposed mechanism is that interface broadening, roughening, and migration redistribute local strain, delay damage initiation, and thereby extend the plastic deformation range.

Because the simulations quantify interface structural accommodation rather than ductility or fracture, the connection to improved macroscopic ductility remains unresolved. The paper identifies experimental validation and further computational studies of flaws, cracks, and damage-process zones as necessary to test this proposed mechanism.