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Embrittlement of FE-CR-AL-ALLOYS

  • J. H. Lange, M. Brede (a1), B. Fischer, S. Spindler, H. Wagner, R. Wittmann, D. Gerthsen (a2), A. Broska and J. Wolff (a3)...


The mechanical behavior of Fe-Cr-Al-alloys was investigated at different temperatures and after several heat-treatments in order to determine critical conditions for the ductility of the material. It was found that a significant embrittlement takes place during deformation at higher temperatures around 400 °C as well as after heat-treatments at temperatures above 1000 °C in combination with very high or very low cooling rates. Possible reasons for this behavior are discussed with respect to the results of transmission electron microscopy (TEM), Auger spectroscopy (AES), positron annihilation spectroscopy (PAS) and measurements of the electrical resistivity.



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[6] Nabarro, F. R. N., Theory of Crystal Dislocations (Dover Publications, New York, 1987), p. 381.
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[9] Sestik, B., Seeger, A., Z. Metallkde. 69, 355 (1978).


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