Overall Project Description:
Data for In Situ TEM Mechanical Testing in Irradiated Oxide Dispersion Strengthened Alloys - v1.0. This is a dataset comprised of
videos and raw load-displacement text files of experiments run to demonstrate the use of in situ TEM mechanical testing to find meaningful
mechanical properties of as received, self-ion, and proton irradiated Fe-9%Cr ODS. The desire to work at small scale in characterization
of irradiated materials to reduce costs and improve throughput, require the development of novel methods to assess mechanical properties
in volume-limited irradiation damage layers.
In this work micropillar compression (archived separately), cantilever bending, lamellae indentation, and clamped beam fracture testing
is conducted on ion-irradiated Fe-9%Cr ODS to find yield stress, elastic modulus, flow stress, and fracture toughness. Micropillars in compression allow us to define a minimum sample dimension, which approaches the obstacle spacing of the material, at which size effects are observed. This relationship between sample dimension and obstacle spacing defined through micropillar compression is extended to a new testing geometry, cantilever bending, and material property, flow stress. Lessons learned during the cantilever bending informed the clamped beam design for conducting fracture testing on a ductile engineering alloy at micrometer scales. Finally, lamellae indentation was conducted to link qualitative observations of the microstructure under load with literature strength of obstacle values. By combining an understanding of the microstructure of irradiated Fe-9%Cr ODS and the in situ TEM technique, one can find the bulk-like mechanical properties of ion irradiated Fe-9%Cr ODS.
This dataset includes all original bright field transmission electron microscopic videos of each clamped beam test conducted.
It also includes the corresponding raw load-displacement data in text file format. The text files were exported from the
Hysitron PI95 software. The material tested was a model Fe-9%Cr ODS alloy in the as received, Fe-ion irradiated to 3 dpa and 500C, Fe-ion irradiated to 100 dpa and 500C, and proton irradiated to 3 dpa 500C conditions. Beams were nominally 4 microns long, 500nm tall, 200 nm thick.
This data would allow for reproduction of analysis of the work in:
Yano, Kayla H., In Situ TEM Mechanical Testing of Irradiated Oxide Dispersion Strengthened Alloys. Purdue University, 2019.
Cite this work
Researchers should cite this work as follows:
- Yano, K. H., Yaqiao Wu, Wharry, J. P. (2019). In situ TEM clamped beam fracture of Fe-9%Cr ODS videos and load-displacement text files. Purdue University Research Repository. doi:10.4231/M543-8C24