摘要
Fe-Al compounds possess a combination of high strength and corrosion resistance at high temperatures.However,increasing Al content to make them lighter results in embrittlement.Here,we investigate the high-temperature behavior of a novel,lightweight,ultra-fine-layered FeAl/FeAl_(2) material.We report a transition from unstable to stable plasticity at 450℃.Below 450℃,deformation is dominated by localized shear deformation within the soft FeAl layers,while above 450℃,it proceeds by co-deformation between Fe Al and the brittle FeAl_(2) layers.We show that co-deformation is associated with the temperature at which the interface converts from sliding to sourcing dislocations for Fe Al_(2).
基金
financially supported by the National Natural Science Foundation of China(Nos.51922082,51971170 and 51942104)
the National Key Research and Development Program of China(No.2017YFB0702301)
the 111 Project of China(No.BP2018008)
the Innovation Project of Shaanxi Province(No.2017KTPT-12)。
