Effect of temperature on the creep behavior of a Ni–Cr–Fe–Al alloy: a comparison of the experimental data and a model |
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Authors: | Essam El-Magd Jürgen Gebhard Jan Stuhrmann |
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Affiliation: | (1) Lehr- und Forschungsgebiet Werkstoffkunde RWTH Aachen, Augustinerbach 4, 52062 Aachen, Germany |
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Abstract: | In order to characterise the mechanical behaviour of sandwich structures, which combine an interlayer of a woven wire mesh
between two thin walled sheet metals, creep tests at 650, 680 and 750 °C were carried out on sheet metals made of the nickel
based alloy Nicrofer 6025 HT (2.4633). In addition to the tests the creep behaviour was simulated by a model, which considers
the creep rate as a function of the applied stress σ and the internal deformation resistance including an internal back stress
σi and a particle resistance σP. The damage is included by a damage parameter D, which converges to “one” with increasing damage. A concluding comparison
with the creep test results shows that the model is able to describe the creep behaviour of the investigated sheet metals. |
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