Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 632, Issue -, Pages 558-562Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.01.215
Keywords
Ni based single crystal superalloy; gamma' phase; Diffusion; Coarsening; Ostwald ripening
Categories
Funding
- National Nature Science Foundations of China [50871005, 51371014]
- China Postdoctoral Science Foundation [2013M540037]
Ask authors/readers for more resources
A modified Ostwald ripening theory was used to evaluate the coarsening behavior of gamma' phases in Ni based single crystal superalloys during thermal exposure. After introducing a dimensionless factor correlated with volume fraction of gamma' phase into the classical Lifshitz-Slyozov-Wagner (LSW) coarsening theory, this model was thus developed by coupling formulaic interfacial energy and diffusion coefficient (including activation energy and pre-exponential factor) as function of alloy composition. The coarsening rate coefficients and radius sizes of gamma' phases were then presented, which show good agreement with the corresponding experimental results. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available