Abstract Heating of deformed metals always causes changes in their structure and properties. These changes are related to annihilation of the crystallographic defects and rearrangement of the dislocation structure. The currently existing knowledge on structural transformations occurring during the heating of deformed metals is mainly based on ex-situ metallographic observation of samples after they have been cooled to room temperature. In this study we attempted to observe defect annihilation and dislocations rearrangement in β-titanium alloy during heating by using in-situ synchrotron X-ray diffraction (SXRD). For this reason, a thorough peak profile analysis using modified Williamson-Hall (mWH) and modified Warren-Averbach (mWA) methods was applied to several hundreds of diffraction patterns obtained during continuous heating of cold rolled Ti45Nb alloy. Several stages of dislocation structure evolution were distinguished based on observation of changes in dislocation density, type of dislocation, energy of dislocations and crystallite size. Such analysis revealed several phenomena which haven't been reported in the literature so far. The results of synchrotron XRD analysis were in excellent agreement with measurements of mechanical properties.

中文翻译：

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原位同步辐射X射线衍射观察变形β-TiNb合金连续加热过程中位错的重排

摘要 变形金属的加热总是引起其结构和性能的变化。这些变化与晶体缺陷的消失和位错结构的重排有关。目前关于变形金属加热过程中发生的结构转变的现有知识主要基于样品冷却至室温后的非原位金相观察。在这项研究中，我们尝试使用原位同步加速器 X 射线衍射 (SXRD) 来观察加热过程中 β-钛合金中的缺陷湮灭和位错重排。为此原因，使用改进的 Williamson-Hall (mWH) 和改进的 Warren-Averbach (mWA) 方法对冷轧 Ti45Nb 合金连续加热过程中获得的数百个衍射图进行了彻底的峰形分析。通过观察位错密度、位错类型、位错能量和微晶尺寸的变化，区分了位错结构演化的几个阶段。这种分析揭示了迄今为止文献中尚未报道的几种现象。同步加速器 XRD 分析的结果与机械性能的测量结果非常一致。这种分析揭示了迄今为止文献中尚未报道的几种现象。同步加速器 XRD 分析的结果与机械性能的测量结果非常一致。这种分析揭示了迄今为止文献中尚未报道的几种现象。同步加速器 XRD 分析的结果与机械性能的测量结果非常一致。