The results of a study of thermal conductivity and specific heat capacity of Zr – 1 wt.% Nb and Ti – 45 wt.% Nb alloys in coarse-grained and ultrafine-grained states are presented. The influence of the utrafinegrained state on the thermophysical properties and the processes of energy dissipation and accumulation during deformation of the alloys are estimated. It is shown that the formation of an ultrafine-grained state in a Zr – 1 wt.% Nb alloy by abc-pressing and subsequent rolling leads to a decrease in its thermal conductivity and specific heat capacity by 10 and 20%, respectively, due to substructural strengthening under severe plastic deformation. It is found out that thermal conductivity and specific heat capacity of the ultrafine-grained Ti – 45 wt.% Nb alloy increase by 7.5 and 5%, respectively, due to dispersion hardening of the ω phase by nanoparticles and formation of a new α phase. It is established that the ultrafine-grained structure has a significant influence on the energy dissipation and accumulation during plastic deformation, which in turn depend on their thermophysical characteristics and on the structural and phase states.

给出了Zr – 1 wt。％Nb和Ti – 45 wt。％Nb合金在粗晶粒和超细晶粒状态下的热导率和比热容的研究结果。估计了超细晶态对合金变形过程中热物理性质以及能量耗散和积累过程的影响。结果表明，通过abc压制和随后的轧制在Zr – 1 wt。％Nb合金中形成超细晶态会导致其热导率和比热容分别降低10％和20％。在严重的塑性变形下进行次结构加固。结果发现，超细晶粒Ti – 45 wt。％Nb合金的热导率和比热分别增加了7.5和5％。由于纳米颗粒使ω相分散硬化并形成了新的α相。可以确定的是，超细晶粒结构对塑性变形过程中的能量耗散和积累具有显着影响，而能量的耗散和积累又取决于它们的热物理特性以及结构和相态。