【摘 要】
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Fe-Al compounds possess a combination of high strength and corrosion resistance at high temperatures.However,increasing Al content to make them lighter results
【机 构】
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Center for Advancing Materials Performance from the Nanoscale, State Key Laboratory for Mechanical B
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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/FeAl2 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 FeAl and the brittle FeAl2 layers.We show that co-deformation is associated with the temperature at which the interface converts from sliding to sourcing dislocations for FeAl2.
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