SYMPOSIA PAPER Published: 01 January 2003

Modeling of Deformation During TMF-Loading


The deformation behavior of two extremely different nickel base alloys under cyclic loading is reported and discussed with respect to the underlying micro-structural mechanisms. One is a high strength cast single crystal alloy and the other is a wrought carbide strengthened alloy with comparably low yield strength showing pronounced plasticity during cyclic deformation. A procedure for modeling of the deformation behavior is described that take this mechanism into account. It implies elastic deformation, yielding, and relaxation. For the low strength alloy, cyclic hardening is additionally accounted for. The modeling procedure, the evaluation of the necessary parameters from isothermal tests, and the predicted results for isothermal and anisothermal loading are compared with experimental results.

Author Information

Affeldt, EE
MTU Aero Engines GmbH, Munich, Germany
Hammer, J
Fachhochschule Regensburg, University of Applied Sciences, Regensburg, Germany
Cerdán de la Cruz, L
MTU Aero Engines GmbH, Munich, Germany
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Developed by Committee: E08
Pages: 15–30
DOI: 10.1520/STP11424S
ISBN-EB: 978-0-8031-5478-0
ISBN-13: 978-0-8031-3467-6