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Ni3Al and Ni3Ge. Energy of plane surface defects and abnormal temperature dependence of flow stress

Abstract

A significant temperature anomaly of the yield point is observed in Ni3Al and Ni3Ge alloys with the L1 2 superstructure. The temperature anomaly is caused by the thin structure of sliding superdislocations and plane defects in L1 2 entering the superdislocation structure. The temperature and concentration dependences of the parameters characterizing in the best way the temperature strengthening in Ni3(Al1 − x , Ge x ) alloys are investigated. It is shown that the alloying Ge element leads to more pronounced manifestation of the temperature strengthening effect in Ni3(Al1 − x , Ge x ).

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Correspondence to Yu. A. Abzaev.

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Original Russian Text © E.V. Kozlov, Yu.A. Abzaev, Yu.V. Solov’eva, V.A. Starenchenko, N.A. Koneva, 2009, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2009, Vol. 73, No. 8, pp. 1083–1087.

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Kozlov, E.V., Abzaev, Y.A., Solov’eva, Y.V. et al. Ni3Al and Ni3Ge. Energy of plane surface defects and abnormal temperature dependence of flow stress. Bull. Russ. Acad. Sci. Phys. 73, 1022–1026 (2009). https://doi.org/10.3103/S1062873809080024

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Keywords

  • Yield Point
  • Ternary Alloy
  • Octahedral Plane
  • Elastic Constant Anisotropy
  • Pronounced Manifestation