Elevated and cryogenic temperature micropillar compression of magnesium–niobium multilayer films

摘要: The mechanical properties of multilayer films consisting alternating layers magnesium and niobium are investigated through micropillar compression experiments across a broad range temperatures. data collected from the variable temperature tests strain rate jump used to gain insight into operative deformation mechanisms within material. At higher temperatures, diffusion-based shown determine plastic behavior multilayers. Diffusion occurs more readily along magnesium–niobium interface than bulk, acting as pathway for diffusion. When individual layer thicknesses sufficiently small, diffusion can remain dominant mechanism down room temperature. Multilayer strengthening models historically rely solely on dislocation-based arguments; therefore, consideration in nanolaminates with low melting components offers improved understanding behavior.