High-temperature deformation of delta-processed Inconel 718
| Autor: | José-María Cabrera, Jessica Calvo, Martha Patricia Guerrero-Mata, Pedro Páramo-Kañetas, Utkudeniz Ozturk |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Delta processing Materials science Inconel 718 Scanning electron microscope Metals and Alloys physically-based approach 02 engineering and technology Enginyeria dels materials [Àrees temàtiques de la UPC] 021001 nanoscience & nanotechnology 01 natural sciences Inconel Industrial and Manufacturing Engineering Grain size Computer Science Applications Stacking-fault energy Modeling and Simulation 0103 physical sciences Ceramics and Composites Dynamic recrystallization Composite material 0210 nano-technology Heat resistant materials Dissolution |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2017.12.014 |
| Popis: | © 2017 Elsevier B.V. The hot-flow behavior of Inconel 718 subjected to delta processing (DP) was analyzed. Hot compression tests were subsequently performed at 960 °C and 1020 °C at the four different strain rates of 0.001, 0.01, 0.1, and 1 s-1. The two deformation temperatures were located below and above the d-solvus of IN718 respectively. Microstructural characterization was performed by means of optical (OM) and scanning electron microscopy (SEM). The high temperature deformation results in the fragmentation of the existing d-phase by means of partial dissolution and/or deformation, leading to an improved grain size control. A classic dynamic recrystallization (DRX) behavior was observed in the flow curves, which is typical of low-medium stacking fault energy (SFE) alloys. This flow behavior was modeled according to various approaches. Peak stress modeling was performed using two different approaches, referred to as ‘apparent’ and ‘physically-based’. The hot-flow behavior before the peak stress was modeled according to the Estrin-Mecking-Bergstrom approach, with Avrami kinetics employed to describe the DRX behavior. |
| Databáze: | OpenAIRE |
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