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A Systematic Study of Fracture of an Impeller Used in a Sewage Plant

Abstract

In this work, the procedures for assessing the damage that has already been occurred on the fracture impeller used in the sewage plant during the working have been applied. Failure quickly happens during the service of the impeller. First, cracks in various places are mentioned in this paper. The mechanism of the drive failure was studied. To characterize failure modes and fracture surfaces, light microscopy, scanning electron microscopy and vibration techniques were used. The fundamental impeller failure modes are summarized. The results revealed that the failure seems to be due to mainly the existence of cracks in the concrete ceiling that the aerator hanged in. These cracks made a misalignment in the shaft rotation and then some cracks formed in the holes used for fixation and finally failure occurred under fatigue loading. Moreover, these cracks can be formed inside the metal (just below the surface) or started just on the surface of the holes and then extended to the core of the impeller material. Both mechanisms are dangerous and cause failure during service. On the other hand, a high concentration of tension is caused by the fact that sharp edges close to the welding region occur between the roller body and the blades.

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References

  1. 1.

    F. Jiang, K.S. Vecchio, Hopkinson bar loaded fracture experimental technique: a critical review of dynamic fracture toughness tests. Appl. Mech. Rev. 62(6), 1–39 (2009). https://doi.org/10.1115/1.3124647

    Article  Google Scholar 

  2. 2.

    S. Das, G. Mukhopadhyay, S. Bhattacharyya, Failure analysis of the impellers of coke plant. Case Stud. Eng. Fail. Anal. 2(2), 157–161 (2014). https://doi.org/10.1016/j.csefa.2014.09.002

    Article  Google Scholar 

  3. 3.

    Y.A. Khalid, S.M. Sapuan, Wear analysis of centrifugal slurry pump impellers. Ind. Lubr. Tribol. 59(1), 18–28 (2007). https://doi.org/10.1108/00368790710723106

    Article  Google Scholar 

  4. 4.

    Y.G. Zheng, H.Z. Hu, Y.M. Zhang, H.X. Hu, Failure analysis of melt urea pump impeller. Tribol. - Mater. Surfaces Interfaces. 7(4), 216–223 (2013). https://doi.org/10.1179/1751584X13Y.0000000045

    CAS  Article  Google Scholar 

  5. 5.

    X. Zhang, R. Yuan, Y. Xie, Study on Impeller Fracture Model Based on Vibration Characteristics and Fractal Theory. (Math. Phys, Adv, 2015) https://doi.org/10.1155/2015/684534

    Book  Google Scholar 

  6. 6.

    L. Witek, Experimental crack propagation and failure analysis of the first stage compressor blade subjected to vibration. Eng. Fail. Anal. 16(7), 2163–2170 (2009). https://doi.org/10.1016/j.engfailanal.2009.02.014

    CAS  Article  Google Scholar 

  7. 7.

    Q. Wu, X. Chen, Z. Fan, D. Nie, J. Pan, Engineering fracture assessment of FV520B steel impeller subjected to dynamic loading. Eng. Fract. Mech. 146, 210–223 (2015). https://doi.org/10.1016/j.engfracmech.2015.07.045

    Article  Google Scholar 

  8. 8.

    D. Hao, D. Wang, Finite-element modeling of the failure of interference-fit planet carrier and shaft assembly. Eng. Fail. Anal. 33, 184–196 (2013). https://doi.org/10.1016/j.engfailanal.2013.04.029

    Article  Google Scholar 

  9. 9.

    C.E. Truman, J.D. Booker, Analysis of a shrink-fit failure on a gear hub/shaft assembly. Eng. Fail. Anal. 14(4), 557–572 (2007). https://doi.org/10.1016/j.engfailanal.2006.03.008

    Article  Google Scholar 

  10. 10.

    A. Ul-Hamid, L.M. Al-Hadhrami, A.I. Mohammed, F.K. Al-Yousef, Failure analysis of an impeller blade. Mater. Corros. 66(3), 286–295 (2015). https://doi.org/10.1002/maco.201307362

    CAS  Article  Google Scholar 

  11. 11.

    J.B. Hartley, ‘Fatigue’ fractures. Br. Med. J. 2(4326), 728 (1943). https://doi.org/10.1136/bmj.2.4326.728-b

    Article  Google Scholar 

  12. 12.

    A.L.V. Da Costa, E. Silva, Non-metallic inclusions in steels - Origin and control. J. Mater. Res. Technol. 7(3), 283–299 (2018). https://doi.org/10.1016/j.jmrt.2018.04.003

    CAS  Article  Google Scholar 

  13. 13.

    N. Ånmark, A. Karasev, P.G. Jönsson, The effect of different non-metallic inclusions on the machinability of steels. Materials (Basel). 8(2), 751–783 (2015). https://doi.org/10.3390/ma8020751

    CAS  Article  Google Scholar 

  14. 14.

    A. Cigada, T. Pastore, P. Pedeferri, B. Vicentini, The sulfide stress corrosion cracking of high alloy stainless steels for oil and natural gas wells. Corros. Sci. 27(10–11), 1213–1223 (1987). https://doi.org/10.1016/0010-938X(87)90110-7

    CAS  Article  Google Scholar 

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Correspondence to Z. Abdel Hamid.

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Hamid, Z.A., Gomaa, N. A Systematic Study of Fracture of an Impeller Used in a Sewage Plant. J Fail. Anal. and Preven. (2021). https://doi.org/10.1007/s11668-021-01234-3

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Keywords

  • Failure case
  • Impeller
  • Fracture
  • Vibration