Creep-Fatigue Interaction Behaviors and Microstructure Evolution of Ni-based Superalloy 617

被引：0
|
作者：
Wu H. [1 ]
Zhang C. [1 ]
Sun L. [1 ]
Xu Q. [2 ]
机构：
[1] Shanghai Electric Power Generation Equipment Co., Ltd., Shanghai
[2] Shanghai Electric Gas Turbine Co., Ltd., Shanghai
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 08期
关键词：
A-USC power plant; Creep-fatigue interaction; Microstructures; Nickel-based superalloy; Γ' phase evolution;
D O I：
10.3901/JME.2022.08.170
中图分类号：
学科分类号：
摘要：
Creep-fatigue test strain-controlled with different tensile strain holding times at 725 ℃ were done on Nickel-based superalloy 617 as a typical candidate material for turbine rotor using an advanced ultra super critical power plant. The mechanical behavior and microstructure evolution under 4 strain holding times were compared and analyzed. The results show that creep-fatigue failure mechanism under short-time strain holding is intergranular failure caused by the connection of fatigue cracks and oxidized cavities and oxidized grain boundaries. As the strain holding time increases, the grain boundary oxidation resistance and the intergranular and intragranular strength increase, and the ability to resist creep and crack propagation increases.The number of 617 creep-fatigue failure cycles decreases while the total running time increases. The crack morphology, microstructure defects, the evolution of carbides and precipitated phases and the formation mechanisms of different γ' phases were discussed. It revealed the influence mechanism between creep-fatigue interactive mechanical behavior and microstructure evolution of 617 Nickel-based alloy, which provides reference for the selection and use of high-temperature components of A-USC turbine units. © 2022 Journal of Mechanical Engineering.
引用
收藏
页码：170 / 180
页数：10
相关论文
共 26 条
  • [1] CHEN Xuewen, HE Aping, YANG Hong, Et al., Key technologies and program implementation for development of high USC steam turbines, Thermal Turbine, 41, 2, pp. 89-96, (2012)
  • [2] HUANG Ou, PENG Zeying, Economy of 700℃ high USC technology, Thermal Turbine, 39, 3, pp. 170-174, (2010)
  • [3] XU Jiong, ZHOU Yigong, The development of 700℃ USC technology, Sino-Global Energy, 17, 6, pp. 13-17, (2012)
  • [4] WANG Huiyang, AN Yunqi, LI Chengyu, Et al., Research progress of Ni-based superalloys, Materials Review, 25, 18, (2011)
  • [5] TIAN Zhongliang, BAO Hansheng, HE Xikou, Et al., Research development on the heat resistant alloy used for 700 ℃ USC turbine rotor, Iron and Steel, 50, 2, pp. 54-69, (2015)
  • [6] YANG Huachun, LIN Fusheng, XIE Xishan, Et al., R&P progress of 700 ℃ power generation technology and alloy 617 in eurpe, Power Equipement, 26, 5, pp. 355-359, (2012)
  • [7] WANG Tianjian, FAN Hua, ZHANG Bangqiang, Et al., Nickel-based superalloy for key components of ultra-supercritical steam turbine operating above 700℃, Dongfang Turbine, 2, pp. 46-53, (2012)
  • [8] MARTINO S, FAULKNER R, HOGG S, Et al., Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications, Materials Science & Engineering A, 619, pp. 77-86, (2014)
  • [9] GUO Yan, WANG Caixia, LI Taijiang, Et al., Microstructure and precipitates of alloy 617B used for 700℃ advanced ulta-supercritical power units, Chinese Journal of Materials Research, 30, 11, pp. 841-847, (2016)
  • [10] LI Ji, GUO Yan, ZHOU Rongcan, Et al., Creep deformation behavior of alloy 617B and the corresponding microstructural evolution, Proceedings of the CSEE, 37, 7, pp. 2040-2045, (2017)
123