The solidified microstructure of Ni-5% Cu alloy is researched in the cool-ing velocity range of 13￣ 130 K /s with a zone melting unidirectional solidification ap-paratus. It indicates that the crystals with different...The solidified microstructure of Ni-5% Cu alloy is researched in the cool-ing velocity range of 13￣ 130 K /s with a zone melting unidirectional solidification ap-paratus. It indicates that the crystals with different crystal growth onentations have dif-ferent solidified microstructures in the condition of GL - 1300 K / cm, v = 500 um / sthe crystal with solidified onentation [100] is dendrite, while the crystal with solidifiedorientation [120] is superfine cell. The crystals have different superfine cellular spacingdue to the crystal growth orientation with GL= 1300 K / cm, v = 800 um / s superfinecellular spacing of the crystal with solidified orientation [100] is 28 um, and that of thecrystal with solidified orientation [211] is 16.5 um. In a grain, two parts have differentmicrostructures due to the different orientations under the same solidificationparameters. In hyporapid solidification, dendritic solidified orientation is not the pre-ferential direction [100], the preferential orientation is disposed in the superfine cellulargrowth process.展开更多
文摘The solidified microstructure of Ni-5% Cu alloy is researched in the cool-ing velocity range of 13￣ 130 K /s with a zone melting unidirectional solidification ap-paratus. It indicates that the crystals with different crystal growth onentations have dif-ferent solidified microstructures in the condition of GL - 1300 K / cm, v = 500 um / sthe crystal with solidified onentation [100] is dendrite, while the crystal with solidifiedorientation [120] is superfine cell. The crystals have different superfine cellular spacingdue to the crystal growth orientation with GL= 1300 K / cm, v = 800 um / s superfinecellular spacing of the crystal with solidified orientation [100] is 28 um, and that of thecrystal with solidified orientation [211] is 16.5 um. In a grain, two parts have differentmicrostructures due to the different orientations under the same solidificationparameters. In hyporapid solidification, dendritic solidified orientation is not the pre-ferential direction [100], the preferential orientation is disposed in the superfine cellulargrowth process.
