Paper Title:
Creep Behaviors of a Single Crystal Nickel-Based Superalloy Containing 4.2%Re
  Abstract

By the measurement of creep curves and microstructure observation, an investigation has been made into the creep behaviors and microstructure evolution of a single crystal nickel-based superalloy containing 4.2%Re. Results show that the superalloy displays an obvious sensibility on the applied temperatures and stresses in the range of the applied temperatures and stresses. During the initial creep, the cubical g¢ phase in the alloy is transformed into an N-type rafted structure along the direction vertical to the applied stress axis. After crept up to fracture, the rafted g¢ phase in the region near fracture is transformed into a twisted configuration. The dislocation climbing over the rafted g¢ phase is considered to be the main deformation mechanism of the alloy during the steady creep state, and dislocations shear into the rafted g¢ phase is the main deformation mechanism of the alloy in the later stage of creep.

  Info
Periodical
Edited by
Enhou Han, Guanghong Lu and Xiaolin Shu
Pages
276-281
DOI
10.4028/www.scientific.net/MSF.689.276
Citation
S. G. Tian, B. J. Qian, F. S. Liang, A. A. Li, X. F. Yu, "Creep Behaviors of a Single Crystal Nickel-Based Superalloy Containing 4.2%Re", Materials Science Forum, Vol. 689, pp. 276-281, 2011
Online since
June 2011
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Price
$32.00
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