engleski

Mechanical Characteristics of Refractory Metals and Alloys in a Wide Temperature Range

The authors studied the regularities in the variation of characteristics of short-term, low-cycle, and long-term static strengths at short test duration in the temperature range from 290 to 3020 K, as well as the mechanism of plastic deformation and fracture modes for tungsten, molybdenum, niobium, and their alloys with hard-solution, dispersion, and mixed hardening produced by the vacuum arc melting (VAM) and powder metallurgy (PM) methods with the account taken of the material structural state and the manufacturing factors. Analysis and generalization of the obtained experimental data revealed that both specific and generalized correlation relationships exist among the mechanical characteristics of the refractory materials under the above loading conditions. The established correlation relationships make it possible to perform an accelerated evaluation and prediction of the characteristics of low-cycle and long-term static strengths and creep resistance of materials from the results of short-term tests.

mechanical characteristics; metals and alloys

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