Engineering topics
Publications and source records attributed to Torrez, Avery Jude.
The main purpose of this presentation is to demonstrate that a high throughput method for fabrication and mechanical testing produces local and bulk-like results.
The present report summarizes the results from a variety of tests performed across different lengths scales used to evaluate the mechanical properties of a FeCrAl C26M weld. A variety of microscale and mesoscale mechanical tests were performed to evaluate a range of properties including nanoindentation hardness, compression and shear yield strengths, tensile strengths, and elongation. Using the mesoscale tensile testing as a baseline for comparison, micropillar compression was found to be the most sensitive to microstructural changes in the weld. Nanoindentation hardness testing, being high throughput, is recommended as a first step to identify major changes in the system and if residual stress is present.
The present report summarizes the nanoindentation characterization of a FeCrAl alloy, C26M in both tube and bar form. The current heat, AC2-B, investigated by electron backscatter diffraction showed a textured system with the cross-section favoring orientations near the [110] and the tube surface near the [111], similar to previous heats of C26M. Nanoindentation with a Berkovich tip measured a similar moduli and hardness for all specimens of ~220 GPa and ~5 GPa, respectively. Spherical nanoindentation was performed on all specimens and orientations. Indentation with a 100 μm tip resulted in a measured moduli and yield strength values of ~215 GPa and ~1.5 GPa for all specimens, respectively, and in agreement with the Berkovich indentation results. Mesoscale tensile bars were laser cut out of a thin piece of AC2-B. Initial tensile testing showed that a minimum gauge thickness/width of 0.05 mm is required to approach more bulk-like conditions.