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Effect of residual thermal stresses on the creep of eutectic composites

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Mechanics of Composite Materials Aims and scope

Conclusions

  1. 1.

    A method was proposed for calculating the residual thermal stresses in eutectic composites within the framework of a volumetric stress-strain state. With allowance for these stresses, we constructed creep curves of a directional γ/γ′-NbC eutectic at different temperatures and stresses.

  2. 2.

    It was shown that residual thermal stresses in the matrix are the reason for the lower ultimate strength of eutectic composites compared to commercial heat-resistant nickel alloys at moderate temperatures.

  3. 3.

    The proposed method can be used not only for natural composites, but also for synthetic composites for which the following conditions are satisfied: Volumetric fraction of the reinforcement no greater than 10–15%; slip and chemical reactions absent at the interface between the components.

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Literature cited

  1. S. T. Kishkin, I. L. Svetlov, A. S. Ovchinskii, N. P. Abalakin, E. R. Golubovskii, and Yu. S. Gusev, “Modeling the creep and fracture of a γ/γ′-MeC directionally crystallized eutectic,” Fiz. Met. Metalloved.,55, No. 1, 171–177 (1983).

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  4. A. I-. Epishin, E. N. Pirogov, and V. P. Konoplenko, “Calculation of the residual stresses in composite materials,” Fiz. Khim. Obrab. Mater., No. 2, 113–117 (1984).

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  5. I. L. Svetlov, E. N. Pirogov, N. P. Abalakin, and A. I. Epishin, “Calculation of the residual stresses and strains in the thermal cycling of eutectic composites,” Fiz. Khim. Obrab. Mater., No. 1, 116–122 (1983).

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Authors and Affiliations

  1. All-Union Scientific-Research Institute of Aviation Materials, Moscow

    I. L. Svetlov, A. I. Epishin & E. N. Pirogov

  2. Moscow Physical Engineering Institute, USSR

    I. L. Svetlov, A. I. Epishin & E. N. Pirogov

Authors
  1. I. L. Svetlov
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  2. A. I. Epishin
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  3. E. N. Pirogov
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Additional information

Translated from Mekhanika Kompozitnykh Materialov, No. 4, pp. 624–632, July–August, 1985.

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Svetlov, I.L., Epishin, A.I. & Pirogov, E.N. Effect of residual thermal stresses on the creep of eutectic composites. Mech Compos Mater 21, 424–431 (1986). https://doi.org/10.1007/BF00610890

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  • DOI: https://doi.org/10.1007/BF00610890

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