Effects of Ruthenium on Microstructure and Stress Rupture Properties of a Nickel-base Single Crystal Superalloy
The effect of Ru addition(0 wt.%,3 wt.%,5 wt.%),on γ′morphology,elemental segregation,microstructural stability under long-term thermal exposure at 980℃ and stress rupture properties at 1100℃/130MPa have been studied.The results showed that with the increase of Ru content,the γ/γ′eutectic volume fraction and the dendrite arm spacing decreased gradually.The γ phase mean size in three alloys decreased with the increase of the Ru content.On the other hand,the dendrite segregation of Al,Ta towards interdendrite area and Re,W towards dendrite core area was alleviated gradually with the increase of the Ru content.The increase of Ru content from 0 wt.% to 5 wt.% pronouncedly enhanced the stress rupture properties by suppressing the precipitation of TCP phases effectively at high temperature.
Ru Microstructure TCP phase Property
Shuai Yang Jian Zhang Yushi Luo Yunsong Zhao Dingzhong Tang Guoqiang Cao
College of Mechanical and Electrical Engineering, Shenyang Aerospace University, Shenyang 110136, Ch National Key Laboratory of Advanced High Temperature Structural Materials, Beijing Institute of Aero State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
777-782
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）