Abstract
We report on the shear–bypassing transition of chemically ordered Al 3 Zr nanoprecipitates. Observation of complex combinations of lattice translations, revealed by scanning transmission electron microscopy, is used as the signature of precipitate shearing during cold deformation. A method is proposed to build a three-dimensional atomic model of sheared particles from a set of three atomic scale projections. An estimation of the antiphase boundary energy of the Al 3 Zr structure is achieved via the comparison of experimental findings to a model of precipitation hardening.
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