Preprint Article Version 1 This version is not peer-reviewed

Effects of Solidification Cooling Rate on the Microstructure of Nickel Based Superalloy GTD222

Version 1 : Received: 6 May 2019 / Approved: 8 May 2019 / Online: 8 May 2019 (08:57:20 CEST)

A peer-reviewed article of this Preprint also exists.

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. Materials 2019, 12, 1920.

Journal reference: Materials 2019, 12, 1920
DOI: 10.3390/ma12121920

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).

Subject Areas

GTD222; nickel based superalloy; solidification behavior; cooling rate

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