Advertisement

Influence of aging treatment on precipitation behavior of η phase in Ni-Co-Cr alloy

  • Wen-juan Wan
  • Guang-wei Han
  • Bo Deng
Article

Abstract

The influence of aging treatment on precipitation behavior of η phase in a new Ni-Co-Cr fastener superalloy, AEREX350, was investigated by means of optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The precipitation behavior of η phase with two kinds of morphologies in this material was found to be sensitive to the temperature and time of aging treatment. Time-temperature-transformation curves of these two η phase were achieved. Furthermore, diffraction patterns revealed the semi-coherent orientation relationship between Η phase and γ matrix. This approach may be used to optimize the microstructure of the alloy for excellent mechanical properties.

Key words

precipitation Η phase aging 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    SPS Technologies Aerospace Fasteners Group. Superalloys Developed by SPS Technologies for Aerospace Fasteners [R]. Jenkitown: SPS Technologies Inc, 1998.Google Scholar
  2. [2]
    Raghavan M, Berkowitz B J. Strain Induced Transformation in MP Alloys [J]. Scripta Metallurgica, 1980, 14: 1009.CrossRefGoogle Scholar
  3. [3]
    Raghavan M, Berkowitz B J, Kane R D. A Transaction Electron Microscopic Investigation of Phase Transformations in MP35N [J]. Metallurgical Transactions A, 1980, 11A: 203.CrossRefGoogle Scholar
  4. [4]
    Slaney J S, Nebiolo R A. Development of MULTIPHASE Alloy MP159 Using Experimental Statistics [J]. Metallography, 1983, 16: 137.CrossRefGoogle Scholar
  5. [5]
    ASM Internation. Cobalt Alloy [J]. Alloy Digest, 1974: Co-68.Google Scholar
  6. [6]
    LU Shi-qiang, SHANG Bao-zhong, LUO Zi-jian. Investigation on the Cold Deformation Strengthening Mechanism in MP159 Alloy [J]. Metall Mater Trans A, 2000, 31A: 5.CrossRefGoogle Scholar
  7. [7]
    Buzolits S. New High Temperature Alloy Characterized by Superior Alloy Properties at Temperatures to 1 350 °F [J]. Industrial Heating, 1994, 61(12): 34.Google Scholar
  8. [8]
    Buzolits S R, Kline L A. Bolting Alloy Fills High Temperature Gap [J]. Advanced Materials and Processes, 1995, 147(2): 33.Google Scholar
  9. [9]
    ASM International. Nickel Alloy [J]. Alloy Digest, 1995 (5): Ni-479.Google Scholar
  10. [10]
    Asgari S. Age-Hardening Behavior and Phase Identification in Solution-Treated AEREX350 Superalloy [J]. Metall Mater Trans A, 2006, 37A: 2051.CrossRefGoogle Scholar
  11. [11]
    Tomasello C M, Pettit F S, Birks N, et al. Precipitation Behavior in AEREX350 [C] //Kissinger R D, Deye D J, Anton D L, et al, eds. Superalloys 1996. Warrendale, TMS, 1996: 145.Google Scholar
  12. [12]
    Shibata T, Shudo Y, Takahashi T, et al. Effect of Stabilizing Treatment on Precipitation Behavior of Alloy 706 [C] //Kissinger R D, Deye D J, Anton D L, et al, eds. Superalloys 1996. Warrendale: TMS, 1996: 627.Google Scholar
  13. [13]
    Danflou H L, Marty M, Walder A. Formations of Serrated Grain Boundaries and Their Effect on the Mechanical Properties in a P/M Nickel Base Superalloy [C] //Antolovich S D, Stusrud R W, MacKay R A, et al, eds. Superalloys 1992. Warrendale: TMS, 1992: 63.Google Scholar

Copyright information

© China Iron and Steel Research Institute Group 2010

Authors and Affiliations

  1. 1.Department of High Temperature Materials ResearchCentral Iron and Steel Research InstituteBeijingChina

Personalised recommendations