Acta Metall Sin  2011, Vol. 47 Issue (1): 61-68    DOI: 10.3724/SP.J.1037.2010.00457

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MICROSTRUCTURE EVOLUTION AND FEM ANALYSIS OF [011] ORIENTED SINGLE CRYSTAL OF A Ni-BASED SUPERALLOY DURING TENSILE CREEP

ZHANG Shu1,2), TIAN Sugui1),  YU Huichen3), SU Yong1),  YU Xingfu1),  YU Lili1)

1) School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870 2) School of Machinary Engineering, Shenyang University of Chemical Technology, Shenyang 110142 3) Beijing Institute of aeronautical Material, Beijing 100095

ZHANG Shu TIAN Sugui YU Huichen SU Yong YU Xingfu YU Lili. MICROSTRUCTURE EVOLUTION AND FEM ANALYSIS OF [011] ORIENTED SINGLE CRYSTAL OF A Ni-BASED SUPERALLOY DURING TENSILE CREEP. Acta Metall Sin, 2011, 47(1): 61-68.

Abstract References Related Articles Recommended Metrics Download:  PDF(1502KB)  Export:  BibTeX | EndNote (RIS)       Abstract  By means of the elastic stress-strain finite element method (FEM), the distribution features of the von Mises stress, strain energy density and the influences of the applied stress on the von Mises stress at γ/γ' phases interface and γ' phase directionally coarsening regularity in a [011] oriented single crystal nickel-based superalloy were investigated. Results show that after heat treatment, the microstructure of the superalloy consists of the cubic γ' phases embedded coherently in the γ matrix, and γ' phases arranged regularly along the <100> direction. Compared to the matrix channel near (010)γ' plane, the bigger von Mises stress are produced within the matrix channel near (001)γ' plane when the tensile stress is applied along the [011] direction. Compared to (010)γ' plane, the larger expanding lattice strain occurs on the (001)γ' plane along the [010]γ' direction under the action of the principal stress component, resulting in the Al, Ti atoms with bigger radius to be trapped by the larger strain zone, which is the main reason of promoting the γ' phase grown directionally into the strip-like rafted structure. Key words:  [011] oriented single crystal      nickel-based superalloy      microstructure evolution      creep      FEM analysis      Received:  07 September 2010      Fund:  Supported by National Natural Science Foundation (No.{\footnotesize\it 50571070}) and Specialized Research Fund for the Doctoral Program of Higher Education (No.20092102110003)   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors ZHANG Shu TIAN Su-GuiShenYangTianSuGui SU Yong YU Hui-Chen YU Xin-Fu YU Li-Li URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00457     OR     https://www.ams.org.cn/EN/Y2011/V47/I1/61 [1] Feng H, Biermann H, Mughrabi H. Metall Mater Trans, 2000; 31A: 585 [2] Yu X F, Tian S G, Du H Q, Yu H C, Wang M G, Shang L J, Cui S S. Mater Sci Eng, 2009; A506: 80 [3] Tien J K, Copley S M. Metall Trans, 1971; 2: 543 [4] Buffiere J Y, Ignat M. Acta Metall Mater, 1995; 43: 1791 [5] Pollock T M, Argon A S. 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