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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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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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Acknowledgement

The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) within the Collaborative Research Center (SFB561) „Thermally Highly Loaded, Porous and Cooled Multi-Layer Systems for Combined Cycle Power Plants” at the RWTH Aachen University.

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  1. Lehr- und Forschungsgebiet Werkstoffkunde RWTH Aachen, Augustinerbach 4, 52062, Aachen, Germany

    Essam El-Magd, Jürgen Gebhard & Jan Stuhrmann

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  1. Essam El-Magd
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  2. Jürgen Gebhard
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  3. Jan Stuhrmann
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Correspondence to Jan Stuhrmann.

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El-Magd, E., Gebhard, J. & Stuhrmann, J. Effect of temperature on the creep behavior of a Ni–Cr–Fe–Al alloy: a comparison of the experimental data and a model. J Mater Sci 42, 5666–5670 (2007). https://doi.org/10.1007/s10853-006-0733-0

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  • DOI: https://doi.org/10.1007/s10853-006-0733-0

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