Investigation on Creep Mechanism of a Ni3Al-based Single Crystal Superalloy IC6SX under 760℃/540MPa

摘要：

　　The creep behaviors of a Ni3Al-base single crystal superalloy IC6SX prepared by spiral grain selection method was studied systematically under the testing condition of 760℃/540MPa.The microstructure evolution,movement of dislocations,formation of the dislocation networks and dislocation configuration during the creep process were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).The results showed that the creep performance of the single crystal alloy IC6SX is excellent under 760℃/540MPa.The experimental results showed that the creep curve of the Ni3Al-base single crystal superalloy IC6SX was divided into three stages,including decelerating creep stage,steady-state creep stage and accelerated creep stage.The microstructure and the dislocation configuration were different at different stage during the creep and the raft microstructure has not been formed.The creep mechanism was main slipping characterized by dislocation glide mechanism.

关键词： Ni3Al Single crystal superalloy Creep mechanism Dislocation configuration IC6SX

作者: Liwu Jiang Shusuo Li Meiling Wu

作者单位: National Center for Materials Service Safety, University of Science and Technology Beijing,Beijing 1 School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics,Beij

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 804-809

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）