Toward a microscopic basis for mechanical behaviour

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Abstract
Based upon our previously developed microscopic model of intergranular embrittlement in A3B L12 intermetallic compounds, it is shown that a plot of A versus B s-orbital electronegativity leads to a clear discrimination between ductile and brittle materials. A structure-property relationship is uncovered by constructing the associated structure map using phenomenological Mendeleev numbers, which exhibits a topology identical to the ductile-brittle property map.