About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
2025 Undergraduate Student Poster Contest
|
| Presentation Title |
SPU-29: A Microstructural Analysis of Friction Stir Processed Ferrous Alloys |
| Author(s) |
Amrita Anand, Erik Herbert, Wei Tang, Alice Perrin |
| On-Site Speaker (Planned) |
Amrita Anand |
| Abstract Scope |
Friction stir processed (FSP) iron alloys with added 6% Ti, 1% Ta, 1% Zr, and 10% V were synthesized to create ultra-fine grains. Electron backscatter diffraction patterns and electron microscopy micrographs were analyzed to provide insight into grain size. Selected regions in each sample were then mechanically tested by nanoindentation regions to correlate hardness and modulus to grain size change and microstructure. Fe-Ti reported the smallest grain size of 79 nm, based on preliminary ImageJ analysis. This reveals that FSP parameters can be altered to synthesize NC grains. Hardness of Fe-V (between Fe-V and Fe-Zr) was highest at 3.7 ± 0.34 GPa. This may be attributed to V present in solid solution form, strengthening the matrix. It can be deduced that segregation of the solutes can either stabilize the grain boundaries or produce precipitates that may stabilize nanocrystalline grains. The focus should therefore be on optimizing FSP for individual materials. |