|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||H-30: Evidence for Nanoindentation Induced Dynamical Recovery in Aluminum
||Yuwei Zhang, George Pharr
|On-Site Speaker (Planned)
In this study, we performed nanoindentation on pure aluminum samples with various indentation depth. With the help of FIB lift out and STEM detector in SEM, we found subgrain forming underneath the indents which display different orientation than the parent crystal form. This observation implies that the variation of hardness with increase of indentation depth is not only related with dislocation nucleation and multiplication, but that the polygonization of dislocations which would turn into low angle grain boundaries exhibits significant influence on the indentation hardness as well. This work highlights the importance of scrutinizing the microstructural evolution in understanding the plastic deformation of materials at nano-micro scale.
||Aluminum, Characterization, Mechanical Properties