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- Title
A comparative study of electric current-assisted and conventional sintering of Inconel 718 superalloy.
- Authors
Ergin, Nuri; Koçak, Necati; Özdemir, Özkan
- Abstract
In this study, In718 powder mixtures prepared from elemental powders following stoichiometric composition and supplied as a commercial product were produced by conventional powder metallurgy (1300 °C/4 h) and electric current-assisted sintering (ECAS)(1700-2300A/10 min) methods and followed by a double-aging heat treatment. The characterization studies determined that the best results were the sample produced by the ECAS method using the elemental powder mixture. The targeted precipitate γ′, γ″, and δ phases were obtained after the heat treatment, and a hardness value of 344 ± 41 HV0.5 and a relative density of 98.96% were achieved. The sample preserved its surface integrity by exhibiting high corrosion resistance from hot corrosion studies in the temperature range of 650–850 °C and NaSO4 + 60%V2O5 environment. The corrosion rate of the sample, which was subjected to electrochemical corrosion tests in 3.5% NaCl and 10% NaNO3 solutions, was determined as 45.59 mpy and 10.56 mpy, respectively.
- Subjects
INCONEL; HEAT treatment; HEAT resistant alloys; SINTERING; ELECTROLYTIC corrosion; POWDERS; POWDER metallurgy
- Publication
Journal of Thermal Analysis & Calorimetry, 2024, Vol 149, Issue 10, p4367
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-024-13008-8