| The effect of doping and rolling conditions on the secondary grain growth behavior of the pure and the doped molybdenum were investigated by means of various methods. The results obtained were summarized as follows. 1) In the rolling texture, the intensity of (200), (211) and (222) peaks are increased with rolling reductions but that of (110), (220) and (310) peaks are decreased. 2) The nucleation of secondary recrystallization initiated at the specimen center and the large scale single crystals were obtained in the Cao, Mgo and Na₂O doped sheets. 3) The secondary grain growth is controlled by annealing temperature, doping elements and rolling conditions. In the present work, the single crystal could be obtained under proper doping and rolling conditions above 2100℃. |
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