EFFECTS OF LAMELLAR BOUNDARIES ON CREEP BEHAVIOR OF PST CRYSTALS OF TiAl ALLOYS

来源期刊：中国有色金属学报(英文版)1998年第4期

论文作者：Lin Jianguo Zhang Yonggang Chen Changqi

文章页码：563 - 566

Key words：TiAl alloy　,PST crystal　,creep behavior,　deformation twin

Abstract: TiAl PST crystals were grown using an induction floating zone melting furnace. The creep behavior and deformation structure at 800℃were studied for the samples with three orientations. The results indicate that the creep behavior of PST crystals is strongly dependent on the lamellar orientation with respect to the loading axis. The presence of lamellar boundaries influences the creep deformation. They may not only inhibit shear deformation across the lamellae, but also pin the dislocation and restrict its motion.