Effect of Etching on Fatigue Properties of DD6 Single-Crystal Superalloy

Abstract

The effects of etching on the surface integrities and the high cycle fatigue properties of DD6 single-crystal superalloy were investigated. The standard heat treated DD6 specimens were etched twice and four times using HCl/H2O2 solution, respectively, and the three-dimensional surface topography of specimens etched for different times was observed by Leica DCM8 confocal microscope and SEM. After that, the specimens with different surface states were subjected to high cycle fatigue testing at 760 °C and 980 °C in ambient atmosphere, respectively. The results showed that the surface of un-etched specimens had many longitudinal and parallel fine scratches which were caused by polishing, and the surface roughness was very low. Etching caused the occurrence of etching pits in the interdendritic areas, and with the increase in etching time, both the depth of the etching pits and the surface roughness increased. Moreover, the fatigue properties of the alloy were reduced after etching. The fatigue properties decreased with the increase in etching time. Etching was found to play a significant role on the high stress amplitude zone, while a smaller influence on the low stress amplitude zone. Compared with the results at 980 °C, the fatigue properties of the alloy at 760 °C were more affected by etching. The fatigue limits at 760 °C of the alloy after etching can be well predicted by the \( \sqrt {\text{area}} \) parameter model.

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References

  1. 1.

    L. Han, D.W. Huang, X.J. Yan, C. Chen, X.Y. Zhang, and M.J. Qi, Combined High and Low Cycle Fatigue Life Prediction Model Based on Damage Mechanics and its Application in Determining the Aluminized Location of Turbine Blade, Int. J. Fatigue, 2019, 127, p 120

    Article  Google Scholar 

  2. 2.

    R. Wang, B. Zhang, D. Hu, K. Jiang, H. Liu, J. Mao, F. Jing, and X. Hao, Thermomechanical Fatigue Experiment and Failure Analysis on a Nickel-Based Superalloy Turbine Blade, Eng. Failure Anal., 2019, 102, p 35

    CAS  Article  Google Scholar 

  3. 3.

    Z.Y. Ye, D.X. Liu, X.H. Zhang, X.M. Zhang, M.X. Lei, and Z. Yang, Corrosion Fatigue Behavior of 7A85 Aluminum Alloy Thick Plate in NaCl Solution, Acta Metall. Sin. (Engl. Lett.), 2015, 28, p 1047

    CAS  Article  Google Scholar 

  4. 4.

    Y. Li, K. Lietaert, W. Li, X.-Y. Zhang, M.A. Leeflang, J. Zhou, and A.A. Zadpoor, Corrosion Fatigue Behavior of Additively Manufactured Biodegradable Porous Iron, Corros. Sci., 2019, 156, p 106

    CAS  Article  Google Scholar 

  5. 5.

    Z.X. Shi, J.R. Li, S.Z. Liu, and J.Q. Zhao, Effect of LAB on the Stress Rupture Properties and Fracture Characteristic of DD6 Single Crystal Superalloy, Rare Met. Mater. Eng., 2012, 41, p 962

    CAS  Article  Google Scholar 

  6. 6.

    HB 5153-96. Method for High Temperature Rotating Bending Fatigue Testing of Metallic Materials. China Aviation Integrated Technology Research Institute, Beijing (1996)

  7. 7.

    X.L. Hao, D.H. Zhang, J.H. Liu, and Z.M. Sun, Influence Law of Pre-Corrosion on AF1410 Steel Fatigue Life, J. Aeronaut. Mater., 2013, 33, p 77

    CAS  Google Scholar 

  8. 8.

    S.J. Luo, M. Liu, and X.Z. Lin, Corrosion Fatigue Behavior of S135 High-Strength Drill Pipe Steel in a Simulated Marine Environment, Mater. Corros., 2019, 70, p 688

    CAS  Article  Google Scholar 

  9. 9.

    J. Yu, J.R. Li, J.Q. Zhao, M. Han, Z.X. Shi, S.Z. Liu, and H.L. Yuan, Orientation Dependence of Creep Properties and Deformation Mechanism in DD6 Single Crystal Superalloy at 760  °C and 785 MPa, Mater. Sci. Eng., 2013, 47, p 560

    Google Scholar 

  10. 10.

    D.T. Ardi, Y.G. Li, K.H.K. Chan, and M.R. Bache, Surface Roughness, Areal Topographic Measurement, and Correlation to LCF Behavior in a Nickel-Based Superalloy, J. Mater. Eng. Perform., 2019, 23, p 3657

    Article  Google Scholar 

  11. 11.

    H.J. Xie, J.R. Li, M. Han, J. Yu, L. Yang, and X.D. Yue, Effect of Over-temperature on Microstructures and High Cycle Fatigue Properties of the Single Crystal Superalloy DD6, Rare Met. Mater. Eng. A, 2018, 47, p 2483

    Google Scholar 

  12. 12.

    L. Liu, J. Meng, J.L. Liu, T. Jin, X.D. Sun, and H.F. Zhang, High Cycle Fatigue Behavior of a Single Crystal Superalloy at Elevated Temperatures, Mater. Sci. Eng. A, 2006, 454, p 357

    Google Scholar 

  13. 13.

    P. Lukáš, L. Kunz, and M. Svoboda, High-Temperature Ultra-High Cycle Fatigue Damage of Notched Single Crystal Superalloys at High Mean Stresses, Int. J. Fatigue, 2005, 27, p 1535

    Article  Google Scholar 

  14. 14.

    M. Lamm and R.F. Singer, The Effect of Casting Conditions on the High-Cycle Fatigue Properties of the Single-Crystal Nickel-Base Superalloy PWA 1483, Metall. Mater. Trans. A, 2007, 38, p 1177

    Article  Google Scholar 

  15. 15.

    X. Zhu, A. Shyam, J.W. Jones, H. Mayer, J.V. Lasecki, and J.E. Allison, Effects of Microstructure and Temperature on Fatigue Behavior of E319-T7 Cast Aluminum Alloy in Very Long Life Cycles, Int. J. Fatigue, 2005, 28, p 1566

    Article  Google Scholar 

  16. 16.

    G.E. Fuchs and B.A. Boutwell, Modeling of the Partitioning and Phase Transformation Temperatures of an As-Cast Third Generation Single Crystal Ni-Base Superalloy, Mater. Sci. Eng. A, 2002, 333, p 72

    Article  Google Scholar 

  17. 17.

    T.F. Cui, D.X. Liu, J. Cai, and X.H. Zhang, Effect of Pre-Corrosion and Corrosion/Fatigue Alternation Frequency on the Fatigue Life of 7B04-T6 Aluminum Alloy, J. Mater. Res., 2016, 31, p 3869

    CAS  Article  Google Scholar 

  18. 18.

    W.L. Xiao, H.B. Chen, and Y. Yin, Experimental Study of Surface Roughness Effect on Low Cycle Fatigue Life of Glidcop and Q345, J. Exp. Mech., 2014, 29, p 417

    Google Scholar 

  19. 19.

    L. Yang and J.R. Li, Effects of Section Size on the Stress Rupture Lives of the Machined Thin-Walled Slab Specimen of DD6 Single Crystal Superalloy at 980 °C/250 MPa, Adv. Mater. Res., 2013, 816, p 90

    Google Scholar 

  20. 20.

    Y. Murakami and M. Endo, Effects of Defects, Inclusions and Inhomogeneities on Fatigue Strength, Int. J. Fatigue, 1994, 16, p 163

    CAS  Article  Google Scholar 

  21. 21.

    H. Itoga, K. Tokaji, M. Nakajima, and H.N. Ko, Effect of Surface Roughness on Step-Wise S-N Characteristics in High Strength Steel, Int. J. Fatigue, 2003, 25, p 379

    CAS  Article  Google Scholar 

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Correspondence to Jianmin Dong.

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Dong, J., Li, J. Effect of Etching on Fatigue Properties of DD6 Single-Crystal Superalloy. J. of Materi Eng and Perform 29, 3195–3204 (2020). https://doi.org/10.1007/s11665-020-04865-z

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Keywords

  • etching
  • DD6
  • fatigue
  • single-crystal superalloy