Abstract

Differential scanning calorimetry, X-ray diffraction analysis, transmission electron microscopy, and microhardness measurements are used to study the reverse ω → α phase transformation in titanium and zirconium, which were subjected to deformation in a Bridgman chamber under close loading conditions in order to obtain additional data on the degree of stability of the studied metals. It was found that, despite the qualitative similarity of heat release processes that occurred in the metals under study, which are recorded by differential scanning calorimetry, the reverse phase transformation in titanium, in contrast to that in zirconium, is realized at lower temperatures and within narrower temperature range over the whole range of preliminary true strain. It was found that the characteristics, such as the temperature of the onset of reverse phase transformation and value of released thermal energy are stabilized on reaching the certain true strain (е ≈ 9), when the mixed nano- and submicrocrystalline structure forms in both the metals, in which deformation defects and extensive interfaces make the maximum energy contribution to the system.

中文翻译：

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Zr 和 Ti 伪单晶中反 ω → α 相变的量热学和特性

摘要

差示扫描量热法、X 射线衍射分析、透射电子显微镜和显微硬度测量用于研究钛和锆中的反向 ω → α 相变，它们在 Bridgman 室中在紧密加载条件下进行变形以获得有关所研究金属的稳定性程度的附加数据。结果发现，尽管通过差示扫描量热法记录的所研究金属中发生的热释放过程在性质上相似，但与锆相比，钛中的反相转变是在较低温度和范围内实现的。在整个初步真应变范围内更窄的温度范围。发现特点，≈ 9），当混合的纳米和亚微晶结构在两种金属中形成时，变形缺陷和广泛的界面对系统的能量贡献最大。