| Autor: |
Padasale, Basavaraj, Potphode, Lokendra, D’silva, Preetish C., Hegde, Subray R. |
| Zdroj: |
Materials Science & Technology; February 2024, Vol. 40 Issue: 2 p120-140, 21p |
| Abstrakt: |
The present work investigates the annealing behaviour of prior-coldworked Inconel 718 (IN718) sheets over wide reduction and temperature ranges by performing cold-rolling and isothermal annealing, followed by mechanical testing and structural characterisation. The study reveals that, with increasing annealing temperature, the prior-coldworked alloy shows non-monotonic M-Type variation with double peak-hardening at 0.3Tmand 0.6Tm. The study discovers that the first peak is due to the ‘static–strain–aging phenomenon’ that precedes recovery-softening. The second peak-hardening is due to precipitation-hardening, following which, the alloy softens due to recrystallisation. Supported by SEM, electron back-scattered diffraction and X-Ray diffraction results, the investigation suggests that the precipitation of fine rod-shaped δ-phase creates numerous nucleation sites at the shear bands that cause recrystallisation-burst at 0.75Tm. However, above 0.75Tmabsence of the δ-phase activates grain-boundary migration resulting in rapid grain-coarsening. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
