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Elastic Deformation Induced Non-equilibrium Segregation of P in IN718 Alloy

Received: 24 March 2016     Published: 25 March 2016
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Abstract

IN718 alloy is a precipitation hardened, nickel-based superalloy that is used extensively in the aircraft engine industry. The excellent cyclic fatigue resistance, high tensile strength, fracture toughness and oxidation resistance allow the alloy to be safely used at maximum useful service temperature of about 650ºC. Many researchers improve the alloy's high-temperature strength through adding of P. However, segregation of P at grain boundary can be induced the grain boundary embrittlement, decreased the tension reduction in area. In this paper, intermediate-temperature embrittlement (ITE) for a IN718 alloy has been experimentally studied by elevated-temperature tension tests. International standard ISO 6892-2 (Metallic Materials Tensile Testing) indicates that the variations in temperature of this measurement system have been found to have a larger potential effect on test results, which is a kind of uncertainty contribution not related to test equipment. International standard ISO 6892-2 maintains that strain rate variations can induce the measurement uncertainty of mechanical properties in tensile testing, which will imperil the reliability of tension tests. The measurement uncertainty of reduction in area relative to strain rate, called as strain rate embrittlement (SRE), is first described experimentally for IN718 alloy in this paper. Then the measurement uncertainty is clarified based on microscopic theory of elastic deformation in metals. It is shown that the elastic deformation of tension test induced the segregation of impurities to grain boundaries and the relevant embrittlement which produces the measurement uncertainty of reduction in area.

Published in International Journal of Materials Science and Applications (Volume 5, Issue 2)
DOI 10.11648/j.ijmsa.20160502.13
Page(s) 49-53
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2016. Published by Science Publishing Group

Keywords

Elastic Deformation, Non-equilibrium Segregation, IN718 Alloy

References
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Cite This Article
  • APA Style

    Jinhui Du, Xudong Lu, Zhongnan Bi, Tingdong Xu. (2016). Elastic Deformation Induced Non-equilibrium Segregation of P in IN718 Alloy. International Journal of Materials Science and Applications, 5(2), 49-53. https://doi.org/10.11648/j.ijmsa.20160502.13

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    ACS Style

    Jinhui Du; Xudong Lu; Zhongnan Bi; Tingdong Xu. Elastic Deformation Induced Non-equilibrium Segregation of P in IN718 Alloy. Int. J. Mater. Sci. Appl. 2016, 5(2), 49-53. doi: 10.11648/j.ijmsa.20160502.13

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    AMA Style

    Jinhui Du, Xudong Lu, Zhongnan Bi, Tingdong Xu. Elastic Deformation Induced Non-equilibrium Segregation of P in IN718 Alloy. Int J Mater Sci Appl. 2016;5(2):49-53. doi: 10.11648/j.ijmsa.20160502.13

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  • @article{10.11648/j.ijmsa.20160502.13,
      author = {Jinhui Du and Xudong Lu and Zhongnan Bi and Tingdong Xu},
      title = {Elastic Deformation Induced Non-equilibrium Segregation of P in IN718 Alloy},
      journal = {International Journal of Materials Science and Applications},
      volume = {5},
      number = {2},
      pages = {49-53},
      doi = {10.11648/j.ijmsa.20160502.13},
      url = {https://doi.org/10.11648/j.ijmsa.20160502.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20160502.13},
      abstract = {IN718 alloy is a precipitation hardened, nickel-based superalloy that is used extensively in the aircraft engine industry. The excellent cyclic fatigue resistance, high tensile strength, fracture toughness and oxidation resistance allow the alloy to be safely used at maximum useful service temperature of about 650ºC. Many researchers improve the alloy's high-temperature strength through adding of P. However, segregation of P at grain boundary can be induced the grain boundary embrittlement, decreased the tension reduction in area. In this paper, intermediate-temperature embrittlement (ITE) for a IN718 alloy has been experimentally studied by elevated-temperature tension tests. International standard ISO 6892-2 (Metallic Materials Tensile Testing) indicates that the variations in temperature of this measurement system have been found to have a larger potential effect on test results, which is a kind of uncertainty contribution not related to test equipment. International standard ISO 6892-2 maintains that strain rate variations can induce the measurement uncertainty of mechanical properties in tensile testing, which will imperil the reliability of tension tests. The measurement uncertainty of reduction in area relative to strain rate, called as strain rate embrittlement (SRE), is first described experimentally for IN718 alloy in this paper. Then the measurement uncertainty is clarified based on microscopic theory of elastic deformation in metals. It is shown that the elastic deformation of tension test induced the segregation of impurities to grain boundaries and the relevant embrittlement which produces the measurement uncertainty of reduction in area.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Elastic Deformation Induced Non-equilibrium Segregation of P in IN718 Alloy
    AU  - Jinhui Du
    AU  - Xudong Lu
    AU  - Zhongnan Bi
    AU  - Tingdong Xu
    Y1  - 2016/03/25
    PY  - 2016
    N1  - https://doi.org/10.11648/j.ijmsa.20160502.13
    DO  - 10.11648/j.ijmsa.20160502.13
    T2  - International Journal of Materials Science and Applications
    JF  - International Journal of Materials Science and Applications
    JO  - International Journal of Materials Science and Applications
    SP  - 49
    EP  - 53
    PB  - Science Publishing Group
    SN  - 2327-2643
    UR  - https://doi.org/10.11648/j.ijmsa.20160502.13
    AB  - IN718 alloy is a precipitation hardened, nickel-based superalloy that is used extensively in the aircraft engine industry. The excellent cyclic fatigue resistance, high tensile strength, fracture toughness and oxidation resistance allow the alloy to be safely used at maximum useful service temperature of about 650ºC. Many researchers improve the alloy's high-temperature strength through adding of P. However, segregation of P at grain boundary can be induced the grain boundary embrittlement, decreased the tension reduction in area. In this paper, intermediate-temperature embrittlement (ITE) for a IN718 alloy has been experimentally studied by elevated-temperature tension tests. International standard ISO 6892-2 (Metallic Materials Tensile Testing) indicates that the variations in temperature of this measurement system have been found to have a larger potential effect on test results, which is a kind of uncertainty contribution not related to test equipment. International standard ISO 6892-2 maintains that strain rate variations can induce the measurement uncertainty of mechanical properties in tensile testing, which will imperil the reliability of tension tests. The measurement uncertainty of reduction in area relative to strain rate, called as strain rate embrittlement (SRE), is first described experimentally for IN718 alloy in this paper. Then the measurement uncertainty is clarified based on microscopic theory of elastic deformation in metals. It is shown that the elastic deformation of tension test induced the segregation of impurities to grain boundaries and the relevant embrittlement which produces the measurement uncertainty of reduction in area.
    VL  - 5
    IS  - 2
    ER  - 

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Author Information
  • Beijing Key Laboratory for Advanced High Temperature Materials, China Iron & Steel Research Institute Group, Beijing, China

  • Beijing Key Laboratory for Advanced High Temperature Materials, China Iron & Steel Research Institute Group, Beijing, China

  • Beijing Key Laboratory for Advanced High Temperature Materials, China Iron & Steel Research Institute Group, Beijing, China

  • Beijing Key Laboratory for Advanced High Temperature Materials, China Iron & Steel Research Institute Group, Beijing, China

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