Ti6Al4V is the most widely used titanium alloy  and comprises two phases, viz. a hexagonally closely packed α phase and a body centred cubic β phase. For the lifing prediction of the alloy components and also for the future alloy development, it is of interest to understand the role of various interfaces such as grain boundaries and inter-phase boundaries in the mechanical response of the alloy. The last ten years have seen the development of nano-mechanical testing within electron microscopes on samples prepared using focused ion beam, which has not only offered the quantitative mechanical properties but also the simultaneous imaging analysis of samples containing specific structural features [2, 3]. In this work, in-situ electron microscopy studies on miniaturised Ti6Al4V samples were used to achieve a better understanding of the plastic deformation micro-mechanisms involved. Micron-sized pillar samples were compressed in an SEM and the mechanical properties of both alpha and beta phases were evaluated, while sub-micron sized pillars were compressed in a TEM to observe the dislocation activities. The nucleation of dislocations, the yielding of the samples and the work hardening observed in the samples with different sizes will be discussed.
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To cite this abstract:Xinyu Lu, Zhaoran Liu, Yu Lung Chiu, Ian Jones; In-situ deformation of Ti6Al4V in electron microscopes. The 16th European Microscopy Congress, Lyon, France. https://emc-proceedings.com/abstract/in-situ-deformation-of-ti6al4v-in-electron-microscopes/. Accessed: September 25, 2023
EMC Abstracts - https://emc-proceedings.com/abstract/in-situ-deformation-of-ti6al4v-in-electron-microscopes/