Paper Title:
Microstructural Evolution during Tensile Creep of a Single-Crystal Nickel-Base Superalloy
  Abstract

Tensile creep tests were conducted at 980°C under a constant stress on a single crystal nickel base superalloy. Some tests were interrupted at different stages during the creep process. The strain-time curves indicated that this alloy exhibited conventional primary, steady-state and tertiary stages at this temperature. The transmission electron microscope (TEM) observations of foils taken from the gauge sections of specimens were made to interpret the microstructural evolution that occurred during the creep process. It was found that the γ′ particles were rafted in the direction perpendicular to the applied stress. The acceleration of the creep rate was related to the change of the dislocation density.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
511-514
DOI
10.4028/www.scientific.net/KEM.353-358.511
Citation
Y. Li, H. C. Yu, X. R. Wu, X. G. Yang, D. Q. Shi, "Microstructural Evolution during Tensile Creep of a Single-Crystal Nickel-Base Superalloy ", Key Engineering Materials, Vols. 353-358, pp. 511-514, 2007
Online since
September 2007
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