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ID 115402
Author
Terada, Yoshihiro Tokyo Institute of Technology
Takeyama, Masao Tokyo Institute of Technology
Keywords
nickel-based alloy
gamma prime
morphology
lattice misfit
Content Type
Journal Article
Description
The morphological evolution of γ′ precipitates and lattice misfit with isothermal aging were closely investigated in wrought Ni-based superalloy Inconel X-750. The γ′ morphology dramatically changes in terms of shape, distribution, coalescence and coherency at the γ/γ′ interface. These processes and their dependence on temperature are summarized as a γ′ morphology map together with a time–temperature–precipitation (TTP) diagram through quantifying relevant morphological parameters. The lattice misfit was measured by X-ray diffraction and is positive; it decreases from 0.6% at room temperature to 0.1% at the aging temperature. These results suggest that the morphological changes of the γ′ precipitates are attributable to very low lattice misfit, the interaction of the elastic field, the volume fraction of the precipitates and incoherence in γ/γ′ interface.
Journal Title
Materials Transactions
ISSN
13459678
13475320
NCID
AA1151294X
Publisher
The Japan Institute of Metals and Materials
Volume
58
Issue
5
Start Page
817
End Page
824
Published Date
2017-04-25
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Science and Technology