Precipitation and Dissolution Behavior of δ Phase in Alloy GH4169G

Fang Liu; Lian Xu Yu; Li Tao Chang; Xin Xin; Wei Hong Zhang; Dang Jia; Feng Qi; Sheng Chao Li

doi:10.4028/www.scientific.net/MSF.747-748.760

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HomeMaterials Science ForumMaterials Science Forum Vols. 747-748Precipitation and Dissolution Behavior of δ Phase...

Precipitation and Dissolution Behavior of δ Phase in Alloy GH4169G

Abstract:

The precipitation and dissolution behavior of δ phase at varied states including as cast, heat treated and thermal processed of GH4169G alloy, have been investigated. The results indicated that δ phase existed in the vicinity of Laves phase and carbides with mainly the rod-like, needle-like morphology, and lath-like morphology because of the segregation of Nb in the interdendritic area. The amount of the δ phase decreased with the increase of the annealing temperature, and the dissolution rate increased with the increase of the annealing temperature. After initial holding of 2 h at 1020°C, the residual δ phase fully dissolved at 1140°C for 20min for the as-cast ingot. The minimum holding time for δ phase dissolution at 1020°C was 2h.

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Periodical:

Materials Science Forum (Volumes 747-748)

Pages:

760-764

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.747-748.760

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Online since:

February 2013

Authors:

Fang Liu, Lian Xu Yu, Li Tao Chang, Xin Xin, Wei Hong Zhang, Dang Jia, Feng Qi, Sheng Chao Li

Keywords:

Dissolution, GH4169G Alloy, Precipitation, δ Phase

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