| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
|
| Presentation Title |
High Throughput Creep Data Acquisition by Cantilever Bending Coupled to Digital Image Correlation |
| Author(s) |
Syed Jalali, Praveen Kumar, Vikram Jayaram |
| On-Site Speaker (Planned) |
Syed Jalali |
| Abstract Scope |
Power law creep during cantilever bending is associated with a re-distribution of stress whose complexity has traditionally only allowed the determination of steady state parameters from multiple tests. The present talk will show how, using model systems of aluminium and lead, the determination of location-specific strain history, along and across a beam, by image correlation methods, can be coupled to estimates of the local stress in one sample. Using such methods it is possible to self-consistently determine (a) the stress exponent in steady state from a single test, (b) the primary as well as steady state creep curve under a known uniaxial stress, and (c) the effect of strain gradients in small samples that can otherwise cause artefacts when extrapolated to the behaviour of large components. In addition to increasing the speed of data acquisition, sample-to-sample variability is also minimised. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |