Effects of Aluminum Addition on Microstructural Characteristics in Modified Coated Nickel-Based Superalloy, GTD-111, by Arc Melting

Panyawat Wangyao; Arisa Meechoorit; Pattarin Pattaraumpornchai; Seksak Asavavisithchai

doi:10.4028/www.scientific.net/AMR.1101.129

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1101Effects of Aluminum Addition on Microstructural...

Effects of Aluminum Addition on Microstructural Characteristics in Modified Coated Nickel-Based Superalloy, GTD-111, by Arc Melting

Abstract:

The nickel-based superalloys, grade GTD-111, were modified by aluminum addition by the mean of vacuum arc melting process, in order to improve microstructure and oxidation resistance at elevated temperatures. The arc melted GTD-111 specimens were added with aluminum of 1, 2 and 3 wt. %. All specimens were then performed with heat treatment, which consists of solution treatment for 6 h at various temperatures of 1125, 1145, 1165, 1185 and 1205°C. After that, all specimens were followed by precipitation aging at 845°C for 24 h. Finally, to evaluate the microstructural stability, the long-term heating at temperatures of 900 and 1000°C for 400 h were performed to the specimens. It was found that the most proper amount of aluminum addition was 1 wt.%, which provided reheat treated microstructures with high area fractions of γ′-precipitated particles, as well as uniformed distribution of cubic γ′-morphology. The most proper solutioning condition is also found at 1165°C for 6 h.

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Advanced Materials Research (Volume 1101)

Pages:

129-133

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1101.129

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Online since:

April 2015

Authors:

Panyawat Wangyao, Arisa Meechoorit, Pattarin Pattaraumpornchai, Seksak Asavavisithchai

Keywords:

Arc Melting Process, Nickel-Based Superalloy, Oxidation Resistance

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