Interface-facilitated stable plasticity in ultra-fine layered FeAl/FeAl2 micro-pillar at high temperature

• 作者: Lulu Li Irene J.Beyerlein Weizhong Han
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（14）
• 页码范围: 61-65
• 页数: 5页
• 语种: 英文

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/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.