Abstract Hydrogen uptake causes hydride formation, lattice strains and other crystallographic changes in Ti6Al4V. To monitor these changes and understand them better, we developed an in situ hydrogen-charging setup for transmission X-ray diffraction, and employed it at a high-energy synchrotron X-ray source. We observed anisotropic lattice expansion by H ingress, as well as hydride formation induced microstrain evolution in both phases. The hydride phase was also crystallographically characterized, including its orientation relationship with the neighboring phases, employing electron backscattered diffraction analysis. Further applications of the presented methodology to investigate H-microstructure interactions are also discussed.

中文翻译：

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Ti6Al4V 中的氢化物形成：原位同步加速器 X 射线衍射研究

摘要 吸氢会导致 Ti6Al4V 中的氢化物形成、晶格应变和其他晶体学变化。为了监测这些变化并更好地了解它们，我们开发了一种用于透射 X 射线衍射的原位充氢装置，并将其用于高能同步加速器 X 射线源。我们观察到 H 进入引起的各向异性晶格膨胀，以及氢化物形成引起的两个相中的微应变演化。氢化物相也被结晶学表征，包括其与相邻相的取向关系，采用电子背散射衍射分析。还讨论了所提出的方法在研究 H 微结构相互作用方面的进一步应用。