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Atom probe tomography; Compression tests; Crystallographic orientation relationships; Face-centred cubic; Mo-alloy pillars; Nano-sized precipitates; Nanoprecipitates; Transmission electron microscopy (TEM), Alloys; Chemical analysis; Compression testing; Electron diffraction; Molybdenum; Nanostructures; Precipitates; Precipitation (chemical); Transmission electron microscopy, Molybdenum alloys
Abstract:
Transmission electron microscopy (TEM) supported by various chemical analyses techniques as well as atom probe tomography is applied to characterize newly identified nanosized precipitates in Mo-alloy nanopillars that were prepared by directional solidification. It is shown that the α-Mo matrix contains Al-enriched face-centred cubic precipitates which have a 4.12 Å lattice parameter, and exhibit a Kurdjumov-Sachs crystallographic orientation relationship with the matrix. Such precipitates could be responsible for the unusual behaviour of the pillars during compression tests.© 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.