摘要
Considering the intrinsic and environmental embrittlement(IE and EE).the room temperature embrittlement of Fe_3Al and FeAl is analysed by means of empirical electron theory of solids and molecules.It is found that both IE and EE exist in Fe_3Al and FeAl.The IE is determined by the characteristic of bond structure and electron distribution;and the EE results from the remarkable decrease of local metallicity and the formation of severe anisotropy bonds when the interstitial sites have been occupied by solute hydrogen.On the basis of analysis results,the effective methods are proposed to improve the ductilities in Fe_3Al and FeAl.
Considering the intrinsic and environmental embrittlement(IE and EE).the room temperature embrittlement of Fe_3Al and FeAl is analysed by means of empirical electron theory of solids and molecules.It is found that both IE and EE exist in Fe_3Al and FeAl.The IE is determined by the characteristic of bond structure and electron distribution;and the EE results from the remarkable decrease of local metallicity and the formation of severe anisotropy bonds when the interstitial sites have been occupied by solute hydrogen.On the basis of analysis results,the effective methods are proposed to improve the ductilities in Fe_3Al and FeAl.
