Abstract
The paper presents the results of theoretical and experimental studies of the deformation mechanism of alloy Ni3Al, undertaken in order to elucidate the nature of the anomalous temperature dependence of the mechanical properties of that alloy. A study is made of the mechanisms of hardening which do not require diffusion migration of atoms for their occurrence; 1) indeterminacy of dislocation axis; 2) recombination and conservative sliding of jogs in superpartial dislocations (SPD); 3) cross-slip of SPD; 4) intersection of antiphased boundaries introduced by cubic slip; 5) work-hardening due to reactions between dislocations of cubic and octahedral planes. All these mechanisms are effective, even at room and lower temperatures, and could be responsible for the increase of the yield point with increase in the temperature of testing from −180 °C, as observed by Davies and Stoloff.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii Fizika, No. 10, pp. 39–45, October, 1971.
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Popov, L.E., Tereshko, I.V., Koneva, N.A. et al. Temperature and velocity dependence of the mechanical properties of the intermetallic compound Ni3Al. I. Soviet Physics Journal 14, 1341–1345 (1971). https://doi.org/10.1007/BF00823874
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DOI: https://doi.org/10.1007/BF00823874