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Microstructures of the Ti–48Al–3Nb–1.5Ta alloy after exposure to different conditions: (a) 800 °C, 100 h; (b) 800 °C, 300 h; (c) 800 °C, 500 h; (d) 800 °C, 800 h; (e) 800 °C, 1000 h; (f) 850 °C, 100 h; (g) 850 °C, 300 h; (h) 850 °C, 500 h; (i) 850 °C, 800 h; (j) 850 °C, 1000 h; (k) 900 °C, 100 h; (l) 900 °C, 300 h; (m) 900 °C, 500 h; (n) 900 °C, 800 h; (o) 900 °C, 1000 h.
