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Author Wang, Xiaomeng ♦ Zhou, Yu ♦ Zhao, Zihua ♦ Zhang, Zheng
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2015
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
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
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.
ISSN 10599495
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-02-07
Publisher Place Boston
e-ISSN 15441024
Journal Journal of Materials Engineering and Performance
Volume Number 24
Issue Number 4
Page Count 13
Starting Page 1492
Ending Page 1504

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Source: SpringerLink