High-temperature deformation of L1₂-FCC two-phase Ir-15Nb-Ni refractory superalloys

来源期刊：中国有色金属学报(英文版)2002年第4期

论文作者：Y. F. Gu Y. Yamabee-Mitarai S. Nakazawa H. Harada

文章页码：780 - 784

Key words：refractory superalloy; microstructure; lattice misfit; creep behavior

Abstract: The creep behaviors of the Ni-added Ir₈₅Nb₁₅ alloys were investigated at 1650～1800℃ by compression tests in vacuum. X-ray diffractometry, transmission electron microscopy and scanning electron microscopy we re conducted to characterize the microstructure and lattice misfit change by the addition of Ni in the Ir₈₅Nb₁₅ alloy. The results reveal that the Ni addition has a significant effect on the creep resistance of the Ir₈₅Nb₁₅ two-phase refractory superalloys. Basing on the results, the relationship among the Ni addition, lattice misfit, microstructure development, and the creep behavior in the Ni-added Ir₈₅Nb₁₅ alloys is discussed.