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Precipitation Behavior of ω o Phase in Ti-37.5Al-12.5Nb Alloy

机译：Ti-37.5Al-12.5Nb合金中ωo相的析出行为

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Mutual transformation between α 2 and ω o phases has been an interesting topic in recent years. In this study, martensitic α 2 was obtained by air-cooling from 1250 °C in Ti-37.5Al-12.5Nb (at%) alloy while four ω o variants formed in the β o phase matrix during the cooling process. Nonetheless, only one ω o variant was observed at the periphery of the α 2 plates in the β o phase and the orientation relationship between these two phases was [0001] α 2 //[ 1 2 ˉ 10 ] ω o ; ( 11 2 ˉ 0 ) α 2 //(0002) ω o . Thin γ plates precipitated within the α 2 phase and were thought to be related to the appearance of ω o phase. The redistribution of the compositions during the phase transformations was studied by energy dispersive X-ray spectroscopy analysis. The corresponding mechanisms of the phase transformations mentioned above are discussed.
机译：近年来，α2相和ωo相之间的相互转换是一个有趣的话题。在这项研究中，通过在1250°C的Ti-37.5Al-12.5Nb（at％）合金中空冷获得马氏体α2，而在冷却过程中在βo相基质中形成了四个ωo变体。然而，在α2板的βo相中仅观察到一个ωo变体，并且这两个相之间的取向关系为[0001]α2 // [1 2ˉ10]ωo。 （11 2ˉ0）α2 //（0002）ωo。薄的γ板在α2相内析出，被认为与ωo相的出现有关。通过能量色散X射线光谱分析法研究了相变过程中组成的重新分布。讨论了上述相变的相应机制。

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