Paper Title:
Microstructure Evolution and Analysis of a Single Crystal Nickel-Based Superalloy during Tensile Creep
  Abstract

By means of the finite element method (FEM) for calculating the von Mises stress and strain energy density in the cubic γ/γ′ phases, the regularity of γ′ phase directional growth is investigated. Results show that the change of the strain energy density in the different planes of the cubical γ′ phase occurs during tensile creep of alloy, the cubical γ′ phase is directionally grown, along the crystal plane with bigger strain energy, to transform into the mesh-like rafted structure along the direction perpendicular to the applied stress axis. The change of the atomic potential energy, interfacial energy and lattice misfit stress is thought to be the driving force for promoting the elements diffusion and directional growth of γ′ phase.

  Info
Periodical
Edited by
Enhou Han, Guanghong Lu and Xiaolin Shu
Pages
154-158
DOI
10.4028/www.scientific.net/MSF.689.154
Citation
S. Zhang, S. G. Tian, Y. Su, B. J. Qian, "Microstructure Evolution and Analysis of a Single Crystal Nickel-Based Superalloy during Tensile Creep", Materials Science Forum, Vol. 689, pp. 154-158, 2011
Online since
June 2011
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