Abstract In the past, little attention was paid to the effects of the high β fraction retained at room temperature on the deformation behavior of β metastable titanium alloys. As it significantly differs from more conventional α/β alloys, mostly constituted of α phase, a thorough investigation appears as mandatory. This is the aim of the present study through a detailed characterization of the operating deformation processes combined with an evaluation of the strain field heterogeneities. Tensile tests conducted in a scanning electron microscope coupled with markers tracking and electron back-scattered diffraction techniques enabled an in situ monitoring of the early activity of deformation systems. A major influence of the elastic anisotropy of the β phase on the highly heterogeneous deformation behavior was revealed in the elastic and plastic regimes. The underlying mechanisms controlling the onset and the development of plasticity in β metastable titanium alloys are clarified and discussed accordingly.

中文翻译：

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β 各向异性对 Ti-5Al-5Mo-5V-3Cr 室温变形过程的影响

摘要 过去很少关注室温下保留的高β分数对β亚稳态钛合金变形行为的影响。由于它与主要由 α 相组成的更传统的 α/β 合金显着不同，因此必须进行彻底的调查。这是本研究的目的，通过对操作变形过程的详细表征以及对应变场不均匀性的评估。在扫描电子显微镜中进行的拉伸测试与标记跟踪和电子背散射衍射技术相结合，可以对变形系统的早期活动进行原位监测。在弹性和塑性状态中揭示了 β 相的弹性各向异性对高度异质变形行为的主要影响。相应地阐明和讨论了控制 β 亚稳态钛合金塑性发生和发展的潜在机制。