engleski

Low-Cycle Strength and Cyclic Creep of a Molybdenum-Tungsten Alloy upon high Temperature Repeated Static Loading

The characteristics of low-cycle strength and cyclic creep of a Mo-30% W-NbC-C alloy produced by powder metallurgy are studied at temperatures of 1770, 2020 and 2270 K. In this temperature range, the unified dependence of the cyclic steady-state creeprate on the ratio of the equivalent stress to the yield strength of the material at a certain tempeature is obtained. The cyclic character of the loading accelerates the processes of directed plastic deformation and fracture in the powder alloy by a factor of 1.5-7 as compared to the corresponding long-term static loading with the curves of cyclic and static creep being qualitatively similar.

low-cycle strength ; cyclic creep ; molybdenum-tungsten alloy ; static loading

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