|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermo-mechanical Response of Materials with Special Emphasis on In-situ Techniques
||In Situ TEM Imaging and Quantitative Orientation Mapping of the Structural Evolution in Nanocrystalline Metals during Mechanical Deformation
||Christian Kuebel, Ankush Kashiwar, Horst Hahn
|On-Site Speaker (Planned)
In situ TEM techniques enable direct imaging of structural changes in response to an external stimulus enabling observation of the corresponding processes, e.g. during mechanical testing. In particular, the combination with automated crystal orientation mapping in STEM mode (ACOM-STEM), which enables direct quantitative imaging of the grain structure in nanocrystalline thin films, is especially powerful combining nanometer spatial resolution in real space with full crystallographic information. We have optimized this approach to follow the structural changes during well-defined in situ straining experiments imaging intra- and intergranular processes with a statistically significant number of grains. The combination with classical in situ BF-TEM imaging further enables acquisition of high-quality mechanical data for the thin film and provides a higher temporal resolution during straining. With this approach, we have focused on the deformation processes in magnetron sputtered nanocrystalline palladium and gold alloys and in particular studied the Bauscher-type effects in these samples.
||Planned: Supplemental Proceedings volume