Process response of Inconel 718 to wire + arc additive manufacturing with cold metal transfer
| Autor: | R. Morana, Matthew Roy, Philip B. Prangnell, Renan Medeiros Kindermann |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Additive manufacturing Alloy 02 engineering and technology engineering.material Laves phase 010402 general chemistry 01 natural sciences Indentation hardness Heat treatment Nickel alloys Carbide Hardness lcsh:TA401-492 General Materials Science Composite material Inconel Microstructure Eutectic system Precipitation (chemistry) Mechanical Engineering 021001 nanoscience & nanotechnology Process stability 0104 chemical sciences Mechanics of Materials engineering lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology |
| Zdroj: | Kindermann, R, Roy, M, Morana, R & Prangnell, P 2020, ' Process response of Inconel 718 to wire + arc additive manufacturing with cold metal transfer ', Materials & Design . https://doi.org/10.1016/j.matdes.2020.109031 Materials & Design, Vol 195, Iss, Pp 109031-(2020) |
| DOI: | 10.1016/j.matdes.2020.109031 |
| Popis: | Wire + arc additive manufacturing (WAAM) with cold metal transfer (CMT) process can reduce cost and lead time during the production of large-scale Ni-based components used in the transportation and energy sector. This paper investigates the effects of processing parameters and heat treatments employed on CMT-WAAM of a precipitation hardenable Ni-based alloy – Inconel 718. The process stability was analysed by electrical transients and melt pool imaging, showing an opposite trend to the measured heat inputs. A 1.2 mm diameter wire permitted deposition widths of 5.92–13.15 mm, but widths larger than ~10 mm decreased the arc stability considerably. Laves length and carbide diameter decreased with travel speed, while the as-deposited hardness increased. These observations permitted a linear wall to be fabricated with a minimal heat input per layer of 181–185 J/mm. An increase in the solution treatment temperature from 980 to 1040 °C reduced microsegregation, Laves and δ phase precipitation. Localised regions with high microhardness were found near interlayer regions due to a local dissolution of Nb-rich eutectic phases. Compared to powder-based additive manufacturing, CMT-WAAM IN718 exhibits a larger melt pool size and lower as-deposited hardness, but has been found to show satisfactory ageing response and similar Laves phase area fraction. |
| Databáze: | OpenAIRE |
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