| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
N-11: In-situ Tensile Test in TEM for High Precision Measurement of Mechanical Behavior and Quantitative Dislocation Motion Correlation with Single Crystal Ni |
| Author(s) |
Xiaoqing Li, John Turner, Karen Bustillo, Rohan Dhall, Andrew M. Minor |
| On-Site Speaker (Planned) |
Xiaoqing Li |
| Abstract Scope |
With the development of electron microscopy, material research aiming at smaller scales had been prevailed. However, nanoscale samples tests have poor repeatability, because their shape and behaviors are harder to control. In this work, in situ TEM mechanical tests of Nickel samples on push-to-pull device were performed in order to determine the precise load-elongation behavior of the dog-bone segment, to match the local plasticity and dislocation motion in that area. Pre-stretching tests were performed to starch the sample to a perfect flat condition before the actual mechanical test. Two “markers”, a free-standing gap, were designed for measuring the precise elongation of the dog-bone segment. Using frame-by-frame digital image analysis for each test, the dislocation motions in dog-bone area and the “marker” distance can be measured. After highlighting all the dislocation motions from the recorded videos, each movement can be matched with the displacement change of the dog-bone. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |