A novel Re-free Ni-based single-crystal superalloy with enhanced creep resistance and microstructure stability

被引：22
|
作者：
Wei, Bensheng [1 ,2 ]
Lin, Yan [1 ,3 ]
Huang, Zaiwang [1 ,2 ]
Huang, Lan [1 ,2 ]
Zhou, Kechao [1 ,2 ]
Zhang, Longfei [1 ,2 ]
Zhang, Lijun [1 ,2 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China
[3] Northwest Inst Nonferrous Met Res, Sate Key Lab Porous Met Mat, Xian 710016, Shanxi, Peoples R China
来源：
ACTA MATERIALIA | 2022年 / 240卷
关键词：
Ni-based single-crystal superalloys; Re-free; Os; Phase stability; Creep resistance; INTERDIFFUSION COEFFICIENTS; PHASE-EQUILIBRIA; X X; RUTHENIUM; RHENIUM; RH; TA; OS; ALLOYS; IR;
D O I：
10.1016/j.actamat.2022.118336
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Rhenium (Re) is a paramount strengthening element in nickel-based single crystal superalloys because of its low diffusion coefficient, high melting point and high partition coefficient between gamma and gamma' phases. However, its detrimental influence on phase stability has remained a long-standing problem to be solved. In this paper, we report a new design strategy to improve creep resistance and phase stability of nickel -based single crystal superalloys by replacing Re by osmium (Os), which contradicts the common belief. The experimental observations clearly show that the creep rate of newly designed CSU-Os-2 alloy is lower than that of commercial CMSX-4 alloy at 980 ?/200 MPa/100 h. Moreover, the CSU-Os-2 alloy also owns the better phase stability after exposure at 1100 ? for 1000 h, compared with CMSX-4 alloy. The striking properties can be well explained by higher partition coefficient between gamma and gamma' phases and very likely lower diffusion coefficient of Os in gamma matrix than Re. (c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页数：9
相关论文
共 50 条
  • [1] EXPLORATION AND RESEARCH OF A NEW Re-FREE Ni-BASED SINGLE CRYSTAL SUPERALLOY
    Zhou Xuefeng
    Chen Guang
    Yan Shitan
    Zheng Gong
    Li Pei
    Chen Feng
    ACTA METALLURGICA SINICA, 2013, 49 (11) : 1467 - 1472
  • [2] Influence of Ru and Cr on solidification process in a Re-free Ni-based single crystal superalloy
    Luo, Yinping
    Zhou, Yizhou
    Liu, Jinlai
    Jinshu Xuebao/Acta Metallurgica Sinica, 2014, 50 (09): : 1025 - 1030
  • [3] INFLUENCE OF Ru AND Cr ON SOLIDIFICATION PROCESS IN A Re-FREE Ni-BASED SINGLE CRYSTAL SUPERALLOY
    Luo Yinping
    Zhou Yizhou
    Liu Jinlai
    ACTA METALLURGICA SINICA, 2014, 50 (09) : 1025 - 1030
  • [4] Strain softening in creep deformation of single-crystal Ni-based superalloy
    Kakehi, K
    Takahashi, S
    JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2004, 68 (08) : 611 - 614
  • [5] Effect of ruthenium on compressive creep of Ni-based single-crystal superalloy
    Shimabayashi, Shunsuke
    Kakehi, Koji
    SCRIPTA MATERIALIA, 2010, 63 (09) : 909 - 912
  • [6] Creep behavior of Re-free nickel-based single crystal superalloy at intermediate temperature
    Tian, S.-G. (tiansugui2003@163.com), 2013, Central South University of Technology (23):
  • [7] Effect of specimen thickness on the creep response of a Ni-based single-crystal superalloy
    Srivastava, A.
    Gopagoni, S.
    Needleman, A.
    Seetharaman, V.
    Staroselsky, A.
    Banerjee, R.
    ACTA MATERIALIA, 2012, 60 (16) : 5697 - 5711
  • [8] Creep properties of a new Re free single crystal Ni-based superalloy, NKH71
    Kondo, Yoshihiro
    Kubo, Yuusuke
    Miura, Nobuhiro
    Murata, Yoshinori
    Yoshinari, Akira
    EUROSUPERALLOYS 2014 - 2ND EUROPEAN SYMPOSIUM ON SUPERALLOYS AND THEIR APPLICATIONS, 2014, 14
  • [9] ANISOTROPIC CREEP IN A Ni-BASED SINGLE CRYSTAL SUPERALLOY
    Jia Yuxian
    Jin Tao
    Liu Jinlai
    Sun Xiaofeng
    Hu Zhuangqi
    ACTA METALLURGICA SINICA, 2009, 45 (11) : 1364 - 1369
  • [10] Influence of microstructure degradation induced by pretreatment on the creep behavior in Ni-based single-crystal superalloy with different orientations
    Gan, Wenyan
    Gao, Hangshan
    Zhao, Yanchao
    Wen, Zhixun
    Lu, Guanguan
    Jiang, Bo
    Yue, Zhufeng
    JOURNAL OF MATERIALS RESEARCH, 2020, 35 (06) : 610 - 622
12345