| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
The Characteristics of Strain Burst Acoustic Emissions during In Situ Microcompression Experiments |
| Author(s) |
Mostafa Omar, Jaafar El-Awady |
| On-Site Speaker (Planned) |
Mostafa Omar |
| Abstract Scope |
Plasticity at the microscale is manifested in an intermittent fashion compared to the smooth bulk behavior. Studying the deformation mechanisms using in-situ micromechanical testing solely is limited to capturing the extrinsic collective behavior of the deformation activities. Acoustic emission (AE) technique is capable of deconvoluting the spatiotemporal overlap as well as capturing the inherent behavior of the active mechanisms. In this work, we report the successful employment of AE technique coupled with in-situ testing in studying the behavior of the strain bursts in Ni single crystals. Bursts were classified into fast and slow. Fast burst occurred at the early deformation stages and possessed large burst sizes. Early fast bursts were found to generate the loudest waves (highest energies and amplitudes). Released AE energies decayed as deformation progressed, nearly saturating at < 10% strain. Measured AE energies were proportional to the dissipated energies calculated from the stress-strain data. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, |