Method for Fabricating Depth-Specific TEM In Situ Tensile Bars
The growing use of ion irradiation to assess degradation of nuclear materials has created a need to develop novel methods to probe the mechanical response of shallow ion-irradiated layers. Transmission electron microscopy (TEM) in situ mechanical testing can isolate the ion-irradiated layer from its unirradiated substrate. However, there is a lack of established procedures for preparing TEM in situ mechanical testing specimens from bulk materials requiring depth-specific examination, e.g., target dose on the ion irradiation damage profile. This study demonstrates a new method for extracting depth-specific TEM in situ tensile bars from a bulk specimen of Fe-5 wt.%Mo. Measured yield stress, ultimate tensile stress, Young’s modulus, and elongation are consistent with those properties obtained from similarly sized Fe and Mo single-crystal nanowires. Results are discussed in the context of the specimen size effect.
Warren, P. H.; Warren, G.; Dubey, M.; Burns, J.; Wu, Y.; and Wharry, J. P.. (2020). "Method for Fabricating Depth-Specific TEM In Situ Tensile Bars". JOM, 72(5), 2057–2064. https://doi.org/10.1007/s11837-020-04105-8