Hot deformation behavior of a new tailored cobalt-based superalloy for turbine discs

被引：5
作者：
Zhong, Xiaokang [1 ,2 ]
Han, Fusheng [1 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2020年 / 35卷 / 06期
基金：
中国国家自然科学基金;
关键词：
grain size; microstructure; stress; strain relationship; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURE EVOLUTION; PROCESSING MAP; STRENGTH; CREEP; ALLOY;
D O I：
10.1557/jmr.2019.414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot deformation behavior of a new tailored cobalt-based superalloy for turbine discs was investigated in the temperature range of 1050-1200 degrees C and the strain rate range of 0.01-10 s(-1). The results show that the flow stress is closely related to the deformation temperature and strain rate, and the flow stress curve of the new tailored alloy belongs to a typical dynamic recrystallization (DRX) type. Microstructure observation reveals that the dominant nucleation mechanism of DRX for the new tailored alloy belongs to discontinuous DRX, while continuous DRX only acts as an assistant nucleation mechanism. The optimum processing parameters of hot working are obtained in the temperature range of 1155-1200 degrees C and the strain rate range of 0.01-0.1 s(-1). The activation energy for the new tailored alloy is determined to be 833.0 kJ/mol, and the relationship between grain size and processing parameters is established by appropriate constitutive equations.
引用
收藏
页码：633 / 643
页数：11
相关论文
共 33 条
  • [1] Hot deformation of 15-5 PH stainless steel
    Aghaie-Khafri, M.
    Adhami, F.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (4-5): : 1052 - 1057
  • [2] Microstructure and creep strength of different γ/γ′-strengthened Co-base superalloy variants
    Bauer, A.
    Neumeier, S.
    Pyczak, F.
    Goeken, M.
    [J]. SCRIPTA MATERIALIA, 2010, 63 (12) : 1197 - 1200
  • [3] A new prediction model of steady state stress based on the influence of the chemical composition for nickel-base superalloys
    Bi, Zhongnan
    Zhang, Maicang
    Dong, Jianxin
    Luo, Kunjie
    Wang, Jue
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (16-17): : 4373 - 4382
  • [4] An electron backscattered diffraction study on the dynamic recrystallization behavior of a nickel-chromium alloy (800H) during hot deformation
    Cao, Yu
    Di, Hongshuang
    Zhang, Jingqi
    Zhang, Jiecen
    Ma, Tianjun
    Misra, R. D. K.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 585 : 71 - 85
  • [5] Creep deformation-induced antiphase boundaries in L12-containing single-crystal cobalt-base superalloys
    Eggeler, Yolita M.
    Titus, Michael S.
    Suzuki, Akane
    Pollock, Tresa M.
    [J]. ACTA MATERIALIA, 2014, 77 : 352 - 359
  • [6] Segregation assisted microtwinning during creep of a polycrystalline L12-hardened Co-base superalloy
    Freund, Lisa P.
    Messe, Olivier M. D. M.
    Barnard, Jonathan S.
    Goeken, Mathias
    Neumeier, Steffen
    Rae, Catherine M. F.
    [J]. ACTA MATERIALIA, 2017, 123 : 295 - 304
  • [7] High temperature properties and fatigue strength of novel wrought γ/γ' Co-base superalloys
    Freund, Lisa Patricia
    Giese, Sven
    Schwimmer, Daniel
    Hoeppel, Heinz Werner
    Neumeier, Steffen
    Goeken, Mathias
    [J]. JOURNAL OF MATERIALS RESEARCH, 2017, 32 (24) : 4475 - 4482
  • [8] New Ni-Co-base disk superalloys with higher strength and creep resistance
    Gu, Y.
    Harada, H.
    Cui, C.
    Ping, D.
    Sato, A.
    Fujioka, J.
    [J]. SCRIPTA MATERIALIA, 2006, 55 (09) : 815 - 818
  • [9] Humphreys F.J., 2004, RECRYSTALLIZATION RE
  • [10] High temperature oxidation of γ/γ′-strengthened Co-base superalloys
    Klein, L.
    Bauer, A.
    Neumeier, S.
    Goeken, M.
    Virtanen, S.
    [J]. CORROSION SCIENCE, 2011, 53 (05) : 2027 - 2034
1234