Paper Title:
Quantification of High Temperature Strength of Nickel-Based Superalloys
  Abstract

The strength of nickel-based superalloys usually consists of solid solution strengthening from the gamma matrix and precipitation hardening due to the gamma' and/or gamma" precipitates. In the present work, a model was developed to calculate the high temperature strength of nickel-based superalloys, where the temperature dependence of each strengthening contribution was accounted for separately. The high temperature strength of these alloys is not only a function of microstructural changes in the material, but the result of a competition between two deformation modes, i.e. the normal low to mid temperature tensile deformation and deformation via a creep mode. Extensive validation had been carried out during the model development. Good agreement between calculated and experimental results has been achieved for a wide range of nickel-based superalloys, including solid solution alloys and precipitation-hardened alloys with different type/amount of precipitates. This model has been applied to two newly developed superalloys and is proved to be able to make predictions to within useful accuracy.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1319-1326
DOI
10.4028/www.scientific.net/MSF.546-549.1319
Citation
Z. L. Guo, N. Saunders, A. P. Miodownik, J.P. Schille, "Quantification of High Temperature Strength of Nickel-Based Superalloys", Materials Science Forum, Vols. 546-549, pp. 1319-1326, 2007
Online since
May 2007
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Price
$32.00
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