Microstructure and Creep Property of DZ125 Nickel-based Superalloy
By means of creep property measurement and microstructure observation,an investigation has been made into the creep behaviors of DZ125 superalloy at high temperature and low stress.Results showed that the superalloy under the applied stress of 137MPa at 1293 K displayed a better creep resistance,and the apparent creep activation energy of the alloy during steady state creep was measured to be Q = 325.57 kJ/mol.The various microstructures were displayed in different regions of the sample,thereinto,the rafted g￠ phase was uniformly distributed in the regions far away from the fracture,but the twisted and coarser rafted g￠ phase appeared in the region near the fracture.The deformation mechanism of the alloy during steady state creep was the dislocations climbing over the rafted g￠ phase.In the later stage of creep,significant amount of dislocations shearing into the rafted g￠-phase promoted the initiation and propagation of the cracks along the boundaries up to the occurrence of fracture,which was though to the fracture mechanism of the alloy during creep.
DZ125 nickel-based superalloy:Microstructure:Creep property
Sugui Tian Xianlin Meng Ning Tian Huichen Yu
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang110870, Chin Beijing Institute of Aeronautical Materials,Beijing 100095,China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
697-702
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）