In Situ TEM Observations of Deformation Processes in Nanocrystalline Pd
In this study we show that in-situ tensile tests performed in a transmission electron microscope (TEM) in combination with high-resolution TEM are feasible, and, that this method is appropriate to elucidate the deformation processes in nanocrystalline materials directly. First results on nanocrystalline Pd produced by repeated cold-rolling with intermediate folding of metal sheets are presented revealing that the material ruptured during the in-situ tensile tests along grain boundaries. Deformation twinning was observed in grains next to the crack indicating that the deformation processes must have originated from the grain boundaries.
Yuri Estrin and Hans Jürgen Maier
H. Rösner and G. Wilde, "In Situ TEM Observations of Deformation Processes in Nanocrystalline Pd", Materials Science Forum, Vols. 584-586, pp. 464-469, 2008