Gao, B.; Sui, Y.; Wang, H.; Zou, C.; Wei, Z.; Wang, R.; Sun, Y. Effects of Cooling Rate on the Solidification and Microstructure of Nickel-Based Superalloy GTD222. Materials2019, 12, 1920.
Gao, B.; Sui, Y.; Wang, H.; Zou, C.; Wei, Z.; Wang, R.; Sun, Y. Effects of Cooling Rate on the Solidification and Microstructure of Nickel-Based Superalloy GTD222. Materials 2019, 12, 1920.
Gao, B.; Sui, Y.; Wang, H.; Zou, C.; Wei, Z.; Wang, R.; Sun, Y. Effects of Cooling Rate on the Solidification and Microstructure of Nickel-Based Superalloy GTD222. Materials2019, 12, 1920.
Gao, B.; Sui, Y.; Wang, H.; Zou, C.; Wei, Z.; Wang, R.; Sun, Y. Effects of Cooling Rate on the Solidification and Microstructure of Nickel-Based Superalloy GTD222. Materials 2019, 12, 1920.
Abstract
The microstructure and solidification behavior of nickel based GTD222 superalloy at different cooling rates are studied. The solidification of the GTD222 superalloy proceeds as follows: L→L+γ, L→L+γ+MC, L→L+(γ/γ ′)-Eutectic and L→η phase. The temperature of liquidus of GTD222 superalloy is 1360 °C while the solidus is slightly lower at 1310 °C, which due to the alloying elements redistribution. It was found that the dendrite arm spacing of the alloy decreased with the increase of cooling rate (From 200 μm at 2.5 K/min to 100 μm at 20 K/min).
Keywords
GTD222; nickel based superalloy; solidification behavior; cooling rate
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright:
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