About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Measurement of Transformation Stress in Metastable HEAs by Nanoindentation |
Author(s) |
Yingjie Lu, Junaid Ahmed, Matthew Daly |
On-Site Speaker (Planned) |
Yingjie Lu |
Abstract Scope |
Pop-in events due to stress-induced phase transformations in metastable HEAs have been observed in the load-depth curves of nanoindentation experiments. To quantify the conditions for phase metastability, the transformation stress during pop-in requires measurement. In the present work, we leverage spherical nanoindentation and Hertzian contact mechanics to estimate the transformation stress. The contact area function of the spherical tipped indenter was calibrated and used in indentation strain and stress calculations. The stress-induced transformation mechanism was verified using electron backscatter diffraction analysis. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Characterization, High-Entropy Alloys |