Paper Title:
A Mathematical Framework for Cyclic Life Prediction of Directionally Solidified Nickel Superalloys
  Abstract

Modern gas turbines utilize single crystal (SX) and directionally solidified (DS) nickel superalloys which hold a higher cyclic life resistance and an improved creep rupture strength compared to their conventionally cast (CC) version. Both, SX and DS materials feature a significant direction dependence of material properties, which needs to be considered in the constitutive and lifing models. In this context, the paper presents a mathematical framework of cyclic life prediction. Although the method is developed for DS nickel alloys with transverse isotropic material behaviour, a generalisation to common orthotropic materials inclu¬ding SX is straightforward. The proposed procedure is validated by two examples. Moreover, an application to turbine components is shown.

  Info
Periodical
Edited by
M. Heilmaier
Pages
363-368
DOI
10.4028/www.scientific.net/AMR.278.363
Citation
R. Mücke, "A Mathematical Framework for Cyclic Life Prediction of Directionally Solidified Nickel Superalloys", Advanced Materials Research, Vol. 278, pp. 363-368, 2011
Online since
July 2011
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