fig10

Figure 10. In situ (A) HEXRD and (B) and (C) TEM heating of a Ti-42Al-8.5Nb alloy: (A) the (20$$ \bar{2} $$0)_α2 reflections gradually split into the (220)_O and (040)_O reflections. (Reproduced from Ref.[35]^[35]); Modulated structures suggestive of O phase presence, observed at (B) room temperature and (C) after heating to 600 °C (Reproduced from Ref.[33]^[33]). HEXRD: High-energy X-ray diffraction; TEM: transmission electron microscopy.