NDLI: Effects of Solutioning on the Dissolution and Coarsening of γ′ Precipitates in a Nickel-Based Superalloy

Content Provider	Springer Nature Link
Author	Wang, Xiaomeng Zhou, Yu Zhao, Zihua Zhang, Zheng
Copyright Year	2015
Abstract	The dissolution and the coarsening of the γ′ precipitates in a nickel-based superalloy GTD-111 solutionized under various solution heat treatment conditions were investigated. The γ′ solvus temperature for the GTD-111 superalloy was about 1180.79 °C obtained by differential scanning calorimetry test. The dissolution and the coarsening of γ′ in the dendrite core were simultaneously observed, but the γ′ precipitates in the interdendritics only occurred to coarsen under the condition of 1125 °C/2 h. The γ′ dissolution, including dendrite core and interdendritics, gradually played a dominant role in the competition between the dissolution and the coarsening of γ′ during the solutioning with the increase of solution temperature and holding time, indicating that the elastic strain field of the alloy gradually reduced. The solution condition of 1225 °C/6 h or 1250 °C/2 h was the optimal solutioning schedule than the other schedules. For a lower solution temperature, the volume fraction of primary γ′ precipitates can faster reach its equilibrium value which is larger than that for a higher solution temperature. With the increase of holding time, the γ′ dissolution rate continuously decreased, and the dissolution activation energy of γ′ gradually increased.
Starting Page	1492
Ending Page	1504
Page Count	13
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	24
Issue Number	4
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2015-02-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	dissolution activation energy microstructure solutioning superalloy Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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