Science Daily  June 14, 2023 Nanostructured metallic materials with abundant high-angle grain boundaries exhibit high strength and good radiation resistance. While the nanoscale grains induce high strength, they also degrade tensile ductility. A team of researchers in the US (Purdue University, Sandia National Laboratory) showed that a gradient nanostructured ferritic steel exhibited simultaneous improvement in yield strength by 36% and uniform elongation by 50% compared to the homogenously structured counterpart. In situ tension studies coupled with electron backscattered diffraction analyses revealed intricate coordinated deformation mechanisms in the gradient structures. The outermost nanolaminate grains sustained a substantial plastic strain via a […]