Journal of Materials Engineering and Performance

, Volume 27, Issue 4, pp 1580–1591 | Cite as

The Precipitation Behavior and Hot Deformation Characteristics of Electron Beam Smelted Inconel 740 Superalloy

  • Xiaogang You
  • Yi Tan
  • Chang Wu
  • Qifan You
  • Longhai Zhao
  • Jiayan Li
Article
  • 61 Downloads

Abstract

The Inconel 740 superalloy was prepared by the electron beam smelting (EBS) technology, the precipitation behavior and strengthening mechanism were studied, and the hot deformation characteristics of EBS 740 superalloy were investigated. The results indicate that the EBS 740 superalloy is mainly strengthened by the mechanism of weakly coupled dislocation shearing, and the resulting critical shear stress is calculated to be 234.6 MPa. The deformation parameters show a great influence on the flow behavior of EBS 740 superalloy. The strain rate sensitivity exponent increases with the increasing of deformation temperature, and the strain hardening exponent shows a decreasing trend with the increasing of strain. The activation energy of EBS 740 above 800 °C is measured to be 408.43 kJ/mol, which is higher than the 740H superalloy. A hyperbolic-sine-type relationship can be observed between the peak stress and Zener–Hollomon parameter. Nevertheless, the influence of deformation parameters is found to be considerably different at temperatures below and above 800 °C. The size of dynamic recrystallization (DRX) grains decreases with the increasing of strain rate when the strain rate is lower than 1/s, and reverse law can be found at higher strain rate. As a result, a piecewise function is established between the DRX grain size and hot working parameters.

Keywords

740 superalloy electron beam smelting hot deformation precipitation 

Notes

Acknowledgments

The authors gratefully acknowledge financial support from the Specialized Research Fund for the National Key Research and Development Plan (Grant No. 2017YFA0403804).

References

  1. 1.
    R. Viswanathan, K. Coleman, and U. Rao, Materials for Ultra-Supercritical Coal-Fired Power Plant Boilers, Int. J. Pres. Ves. Pip., 2006, 83, p 778–783CrossRefGoogle Scholar
  2. 2.
    X. You, Y. Tan, J. Li, P. Li, C. Dong, S. Shi, J. Liao, and S. Qin, Effects of Solution Heat Treatment on the Microstructure and Hardness of Inconel 740 Superalloy Prepared by Electron Beam Smelting, J. Alloys Compd., 2015, 638, p 239–248CrossRefGoogle Scholar
  3. 3.
    Y. Tan, X. You, Q. You, J. Li, S. Shi, and P. Li, Microstructure and Deformation Behavior of Nickel Based Superalloy Inconel 740 Prepared by Electron Beam Smelting, Mater. Charact., 2016, 114, p 267–276CrossRefGoogle Scholar
  4. 4.
    X. You, Y. Tan, Q. You, S. Shi, J. Li, F. Ye, and X. Wei, Preparation of Inconel 740 Superalloy by Electron Beam Smelting, J. Alloys Compd., 2016, 676, p 202–208CrossRefGoogle Scholar
  5. 5.
    A. Choudhury and E. Hengsberger, Elerctron Beam Melting and Refinining of Metals and Alloys, ISIJ Int., 1992, 32, p 673–681CrossRefGoogle Scholar
  6. 6.
    H. Yuan and W.C. Liu, Effect of the δ Phase on the Hot Deformation Behavior of Inconel 718, Mater. Sci. Eng. A, 2005, 408, p 281–289CrossRefGoogle Scholar
  7. 7.
    A. Thomas, M. El-Wahabi, J.M. Cabrera, and J.M. Prado, High Temperature Deformation of Inconel 718, J. Mater. Process. Technol., 2006, 177, p 469–472CrossRefGoogle Scholar
  8. 8.
    L.M. Brown, R.K. Ham, Strengthening Methods in Crystals, A. Kelly, R.B. Nicholson, Eds., Halsted Press Division, Wiley, New York, NY, 1971, p 9Google Scholar
  9. 9.
    W. Huther and B. Reppich, Interaction of Dislocations with Coherent, Stree-Free Ordered Particles, Z. Fur Metallkunde, 1978, 69, p 628–634Google Scholar
  10. 10.
    M.P. Jackson and R.C. Reed, Heat Treatment of UDIMET 720Li: The Effect of Microstructure on Properties, Mater. Sci. Eng. A, 1999, 259, p 85–97CrossRefGoogle Scholar
  11. 11.
    B. Reppich, Some New Aspects Concerning Particle Hardening Mechanisms in γ’ Precipitating Ni-base Alloys-I. Theoretical Concept, Acta Metall., 1982, 30, p 87–94CrossRefGoogle Scholar
  12. 12.
    A.J. Ardell, Precipitation Hardening, Metall. Trans. A, 1985, 16, p 2131–2165CrossRefGoogle Scholar
  13. 13.
    J.H. Oh, B.G. Yoo, I.C. Choi, M.L. Santella, and J.I. Jang, Influence of Thermo-Mechanical Treatment on the Precipitation Strengthening Behavior of Inconel 740, a Ni-Based Superalloy, J. Mater. Res., 2011, 26, p 1253–1259CrossRefGoogle Scholar
  14. 14.
    H. Zhang, K. Zhang, Z. Lu, C. Zhao, and X. Yang, Hot Deformation Behavior and Processing Map of a γ′-Hardened Nickel-Based Superalloy, Mater. Sci. Eng. A, 2014, 604, p 1–8CrossRefGoogle Scholar
  15. 15.
    W.A. Backofen, I.R. Turner, and D.H. Avery, Superplasticity in an Al–Zn Alloy, Trans. ASM, 1964, 57, p 980–990Google Scholar
  16. 16.
    A. Van den Beukel, Theory of the Effect of Dynamic Strain Aging on Mechanical Properties, Phys. Status Solidi (a), 1975, 30, p 197–206CrossRefGoogle Scholar
  17. 17.
    K. Wang, M.Q. Li, J. Luo, and C. Li, Effect of the δ Phase on the Deformation Behavior in Isothermal Compression of Superalloy GH4169, Mater. Sci. Eng. A, 2011, 528, p 4723–4731CrossRefGoogle Scholar
  18. 18.
    J. Luo and M.Q. Li, Strain Rate Sensitivity and Strain Hardening Exponent During the Isothermal Compression of Ti60 Alloy, Mater. Sci. Eng. A, 2012, 538, p 156–163CrossRefGoogle Scholar
  19. 19.
    Y.M. Wang, A.M. Hodge, P.M. Bythrow, T.W. Barbee, Jr., and A.V. Hamza, Negative Strain Rate Sensitivity in Ultrahigh-Strength Nanocrystalline Tantalum, Appl. Phys. Lett., 2006, 89, p 081903CrossRefGoogle Scholar
  20. 20.
    B.Q. Han, J. Huang, Y.T. Zhu, and E.J. Lavernia, Negative strain-Rate Sensitivity in a Nanostructured Aluminum Alloy, Adv. Eng. Mater., 2006, 8, p 945–947CrossRefGoogle Scholar
  21. 21.
    J.H. Holloman, Tensile Deformations, Trans. Met. Soc. AIME, 1945, 162, p 268–290Google Scholar
  22. 22.
    C.M. Sellars and W.J.M.G. Tegart, Relationship Between Strength and Structure in Deformation at Elevated Temperatures, Mem. Sci. Rev. Met., 1966, 63, p 731Google Scholar
  23. 23.
    T. Sakai, Dynamic Recrystallization Microstructures Under Hot Working Conditions, J. Mater. Process. Tech., 1995, 53, p 349–361CrossRefGoogle Scholar
  24. 24.
    A. Chamanfar, M. Jahazi, J. Gholipour, P. Wanjara, and S. Yue, Evolution of Flow Stress and Microstructure During Isothermal Compression of Waspaloy, Mater. Sci. Eng. A, 2014, 615, p 497–510CrossRefGoogle Scholar
  25. 25.
    Y. Liu, R. Hu, J.S. Li, H.C. Kou, H.W. Li, H. Chang, and H.Z. Fu, Deformation Characteristics of As-Received Haynes 230 Nickel Base Superalloy, Mater. Sci. Eng. A, 2008, 497, p 283–289CrossRefGoogle Scholar
  26. 26.
    Z.N. Bi, M.C. Zhang, J.X. Dong, K.J. Luo, and J. Wang, A New Prediction Model of Steady State Stress Based on the Influence of the Chemical Composition for Nickel-Base Superalloys, Mater. Sci. Eng. A, 2010, 527, p 4373–4382CrossRefGoogle Scholar
  27. 27.
    V.V. Balasubrahmanyam and Y. Prasad, Deformation Behaviour of Beta Titanium Alloy Ti-10 V-4.5Fe-1.5 Al in Hot Upset Forging, Mater. Sci. Eng. A, 2002, 336, p 150–158CrossRefGoogle Scholar
  28. 28.
    Y. Wang, W.Z. Shao, L. Zhen, L. Yang, and X.M. Zhang, Flow Behavior and Microstructures of Superalloy 718 During High Temperature Deformation, Mater. Sci. Eng. A, 2008, 497, p 479–486CrossRefGoogle Scholar
  29. 29.
    J. Wang, J. Dong, M. Zhang, and X. Xie, Hot Working Characteristics of Nickel-Base Superalloy 740H During Compression, Mater. Sci. Eng. A, 2013, 566, p 61–70CrossRefGoogle Scholar
  30. 30.
    R.L. Goetz and S.L. Semiatin, The Adiabatic Correction Factor for Deformation Heating During the Uniaxial Compression Test, J. Mater. Eng. Perform., 2001, 10, p 710–717CrossRefGoogle Scholar
  31. 31.
    K. Song and M. Aindow, Grain Growth and Particle Pinning in a Model Ni-Based Superalloy, Mater. Sci. Eng. A, 2008, 479, p 365–372CrossRefGoogle Scholar

Copyright information

© ASM International 2018

Authors and Affiliations

  • Xiaogang You
    • 1
    • 2
    • 3
  • Yi Tan
    • 1
    • 2
  • Chang Wu
    • 4
  • Qifan You
    • 1
    • 2
  • Longhai Zhao
    • 1
    • 2
  • Jiayan Li
    • 1
    • 2
  1. 1.School of Materials Science and EngineeringDalian University of TechnologyDalianChina
  2. 2.Laboratory for New Energy Material Energetic Beam Metallurgical Equipment Engineering of Liaoning ProvinceDalianChina
  3. 3.Department of Metallurgy and Ceramics Science, Graduate School of Science and EngineeringTokyo Institute of TechnologyTokyoJapan
  4. 4.Institute for Superconducting and Electronic MaterialsUniversity of WollongongWollongongAustralia

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