Abstract
The main goal of this study is acoustic emission (AE) measuring of residual stresses in welded structures. The welding residual stresses release in three 2.25Cr1Mo0.25V welded specimens with different heat treatment conditions were detected and evaluated during the hole drilling strain gauge measurement by AE technique. AE signals from residual stresses release were detected and analyzed for the first time. The results showed that the waveform of residual stress release signal is in a burst type and the spectral energy has the peak frequency at 147 kHz. Furthermore, the AE hits of as-welded specimen are much more than those of specimens after heat treatment due to the higher welding residual stresses. This indicates that AE is sensitive to residual stresses and could be used as a tool to monitor residual stresses release and to make evaluations on residual stresses qualitatively in the future.
| Original language | English |
|---|---|
| Pages (from-to) | 13759-13766 |
| Number of pages | 8 |
| Journal | Materials Today: Proceedings |
| Volume | 5 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2018 |
| Event | 1st International Conference on Advanced Energy Materials, AEM2 016 - 8th International Conference on Advanced Nanomaterials - Guildford, United Kingdom Duration: 12 Sep 2016 → 16 Sep 2016 |
Keywords
- Acoustic emission
- Hole drilling strain gauge measurement
- Residual stress
- Weld