| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Measurement of Strain Rate Sensitivity by the Constant Load and Hold Indentation Method: A Case Study in Calcium Fluoride |
| Author(s) |
Zhiyuan Liang, George M. Pharr |
| On-Site Speaker (Planned) |
Zhiyuan Liang |
| Abstract Scope |
Over the past decade, there has been a growing interest in measuring the strain rate sensitivity of materials by load- and depth-sensing indentation. These measurements are based on the finding that the macroscopic strain rate sensitivity can be determined from the relation between the indentation strain rate and its corresponding hardness. Nevertheless, the situation becomes complicated when the subject material exhibits an indentation size effect. In this case, the hardness is a function of both the indentation strain rate and the indent size. Here, we address this issue by means of a constant load and hold indentation testing method. Using single crystal calcium fluoride as a model material, it is shown that the proposed approach can obtain the size-independent hardness over four orders of indentation strain rate, which can then be used to determine the macroscopic strain rate sensitivity. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |