ISSN: 0090-3973
Page Count: 5

Characterization and Simulation of the Creep Behavior of P92 Sandwich Structures at 923 K with Loading Transverse to the Intermediate Layer
El-Magd, E
Professor,

Gebhard, J
Research Assistant, Institute of Material,

Stuhrmann, J
Research Assistant, Institute for Materials,

(Received 30 March 2004; accepted 24 April 2006)

Abstract

Improving thermal efficiency in modern steam turbines can be achieved by the application of new cooling systems, such as sandwich structures which enable cooling steam to flow without severe losses during operation. The mechanical behavior, especially the creep behavior, of the cooling structure could decide its adoption in a newly built combined cycle power plant. P92 sandwich structures which combine an interlayer of a woven wire mesh between two plane sheets were suggested. Creep tests at T=923 K on this sandwich structure were performed by loading transverse to the intermediate layer. In this work, a new test arrangement for carrying out these tests was introduced. Furthermore, the creep behavior was simulated with the finite element method using creep law material parameters determined from bulk material.

Keywords:
creep behavior, sandwich structure, FEM simulation, P92

Paper ID: JTE100072
DOI: 10.1520/JTE100072
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