Advertisement

Journal of Mechanical Science and Technology

, Volume 33, Issue 11, pp 5243–5250 | Cite as

Degradation and reduction of small punch creep life of service-exposed Super304H steel

  • Thi Giang Le
  • Kee Bong YoonEmail author
  • Tae Min Jeong
Article
  • 12 Downloads

Abstract

To ensure the safety and structural integrity of a power boiler in thermal power plants, residual life management of superheater tubes at elevated temperature is needed. Over the decades, small punch (SP) creep testing has been widely used as an effective method for measuring creep life and creep properties of the boiler tube materials. In this study, a series of SP creep tests were performed at 650 °C with virgin and service-exposed Super304H stainless steels. The service period was 54750 h and 68550 h, respectively. The residual creep rupture life of the 68550 h serviced Super304H material decreased significantly when it was compared with the virgin and 54750 h serviced materials. Coarsening of the M23C6 precipitates along the grain boundaries made the adjacent region Cr-depleted, which could accelerate the formation of creep cavities at the grain boundaries. These microstructural degradations reduced the creep rupture life of the service-exposed materials. The Larson–Miller curve and the Monkman–Grant relationship were applied to predict the creep rupture life of service-exposed Super304H steels from the measured short creep rupture data.

Keywords

Super304H Small punch creep Creep life Precipitate Degradation Superheater tube 

Nomenclature

Ā

Small punch creep coefficient

Small punch creep exponent

B

Monkman Grant constant

C

Larson Miller constant

LMP

Larson Miller parameter

P

Small punch load

tr

Time to rupture (in hours)

T

Temperature (in Kelvin)

δ̇min

Minimum punch-displacement rate

α

Monkman-Grant exponent for small punch creep

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Notes

Acknowledgments

This work was supported by a Korea Institute of Energy Technology Evaluation and Planning (KETEP) [grant number 2014 1010101850] funded by the Ministry of Trade, Industry and Energy (MOTIE). This study was also supported by a KETEP [grant number 2016 1110100090] funded by the MOTIE.

References

  1. [1]
    F. Masuyama, History of power plants and progress in heat resistant steels, ISIJ International, 41 (6) (2001) 612–615.CrossRefGoogle Scholar
  2. [2]
    M. K. Dash, T. Karthikeyan, R. Mythili, V. D. Vijayanand and S. Saroja, Effect of long-term thermal exposures on microstructure and impression creep in 304HCu grade austenitic stainless steel, Metallurgical and Materials Transactions A, 48 (10) (2017) 4883–4894.CrossRefGoogle Scholar
  3. [3]
    D. B. Park, S. M. Hong, K. H. Lee, M. Y. Huh, J. Y. Suh, S. C. Lee and W. S. Jung, High-temperature creep behavior and microstructural evolution of an 18Cr9Ni3CuNbVN austenitic stainless steel, Materials Characterization, 93 (2014) 52–61.CrossRefGoogle Scholar
  4. [4]
    X. Huang, Q. Zhou, W. Wang, W. S. Li and Y. Gao, Microstructure and property evolutions of a novel Super304H steel during high temperature creeping, Materials at High Temperatures, 35 (5) (2017) 438–450.CrossRefGoogle Scholar
  5. [5]
    S. Bagui, K. Laha, R. Mitra and S. Tarafder, Accelerated creep behavior of Nb and Cu added 18Cr-8Ni austenitic stainless steel, Materials Research Express, 5 (11) (2018) 116515.CrossRefGoogle Scholar
  6. [6]
    H. Tanaka, M. Murata, F. Abe and H. Irie, Microstructural evolution and change in hardness in type 304H stainless steel during long-term creep, Materials Science and Engineering A, 319–319 (2001) 788–791.CrossRefGoogle Scholar
  7. [7]
    V. H. Dao, K. B. Yoon, G. M. Yang and J. S. Oh, Determination of creep constitutive model for 28-48WCo alloy based on experimental creep tests at 817–817 °C, J. of Mechanical Science and Technology, 32 (9) (2018) 4201–4208.CrossRefGoogle Scholar
  8. [8]
    S. Yang, J. Zhou, X. Ling and Z. Yang, Effect of geometric factors and processing parameters on plastic damage of SUS304 stainless steel by small punch test, Materials and Design, 41 (2012) 447–452.CrossRefGoogle Scholar
  9. [9]
    M. P. Manahan, A. S. Argon and O. K. Harling, The development of a miniaturized disk bend test for the determination of postirradiation mechanical properties, J. of Nuclear Materials, 104 (1981) 1545–1550.CrossRefGoogle Scholar
  10. [10]
    T. Izaki, T. Kobayashi, J. Kusumoto and A. Kanaya, A creep life assessment method for boiler pipes using small punch creep test, International J. of Pressure Vessel Piping, 86 (9) (2009) 637–642.CrossRefGoogle Scholar
  11. [11]
    A. Moradi, N. Soltani and H. Nobakhti, Experimental study of remaining creep life of SA-304L stainless steel using small punch creep test, Materials at High Temperatures, 35 (5) (2017) 410–417.CrossRefGoogle Scholar
  12. [12]
    N. C. Z. Htun, T. T. Nguyen, D. Won, M. H. Nguyen and K. B. Yoon, Creep fracture behaviour of SUS304H steel with vanadium addition based on small punch creep testing, Materials at High Temperatures, 34 (1) (2017) 33–40.CrossRefGoogle Scholar
  13. [13]
    N. C. Z. Htun, T. T. Nguyen, K. B. Yoon and J. H Park, Small punch and uniaxial creep fracture behaviours of modified SUS304H steel at various temperatures, Materials at High Temperatures, 35 (4) (2018) 378–386.CrossRefGoogle Scholar
  14. [14]
    S. I. Komazaki, T. Kato, Y. Kohno and H. Tanigawa, Creep property measurements of welded joint of reducedactivation ferritic steel by the small-punch creep test, Materials Science and Engineering A, 510–510 (C) (2009) 229–233.CrossRefGoogle Scholar
  15. [15]
    Y. W. Ma, S. Shim and K. B. Yoon, Assessment of power law creep constants of Gr91 steel using small punch creep tests, Fatigue and Fracture Engineering Materials and Structures, 32 (12) (2009) 951–960.CrossRefGoogle Scholar
  16. [16]
    M. D. Mathew, J. G. Kumar, V. Ganesan and K. Laha, Small punch creep studies for optimization of nitrogen content in 316LN SS for enhanced creep resistance, Metallurgical and Materials Transactions A, 45 (2) (2014) 731–737.CrossRefGoogle Scholar
  17. [17]
    F. D. Persio, G. C. Stratford and R. C. Hurst, Validation of the small punch test as a method for assessing ageing of a V modified low alloy steel, Proc. of the Baltica VI International Conference on Life Management and Maintenance for Power Plants, Helsinki, Finland, 2 (2004) 523–535.Google Scholar
  18. [18]
    ASTM A213/213M: Standard Specification for Steamless Ferritic and Austenitic Alloy-steel Boiler, Superheater, and Heat-exchanger Tubes, ASTM International (2003).Google Scholar
  19. [19]
    T. Zhou, R. P. Babu, J. Odqvist, H. Yu and P. Hedström, Quantitative electron microscopy and physically based modeling of Cu precipitation in precipitation-hardening martensitic stainless steel 15-5 PH, Materials and Design, 143 (2018) 141–149.CrossRefGoogle Scholar
  20. [20]
    Q. Xiong, J. D. Robson, L. Chang, J. W. Fellowes and M. C. Smith, Numerical simulation of grain boundary carbides evolution in 316H stainless steel, J. of Nuclear Materials, 508 (2018) 299–309.CrossRefGoogle Scholar
  21. [21]
    M. Hillert, The compound energy formalism, Journal of Alloys and Compounds, 320 (2) (2001) 161–176.CrossRefGoogle Scholar
  22. [22]
    V. Makarevičius, V. Baltušnikas, I. Lukošiūtė, R. Kriūkienė and A. Grybėnas, Transformation kinetic of M23C6 carbide lattice parameters in ferritic-martensitic P91 steel during thermal ageing, Proc. of Metal, Brno, Czech Republic (2015) 2–6.Google Scholar
  23. [23]
    S. Yamasaki, Modelling precipitation of carbides in martensitic steels, Doctoral Thesis, University of Cambridge, UK (2004).Google Scholar
  24. [24]
    S. R. Ortner, A stem study of the effect of precipitation on grain boundary chemistry in AISI 304 steel, Acta Metallurgica et Materialia, 39 (3) (1991) 341–350.CrossRefGoogle Scholar
  25. [25]
    X. M. Li, Y. Zou, Z. W. Zhang, Z. D. Zou and B. S. Du, Intergranular corrosion of weld metal of super type 304H steel during 650 °C aging, Corrosion, 68 (2012) 379–387.CrossRefGoogle Scholar
  26. [26]
    K. C. Sahoo, S. Goyal, V. Ganesan, J. Vanaja, G. V. Reddy, P. Padmanabhan and S. K. Laha, Analysis of creep deformation and damage behaviour of 304HCu austenitic stainless steel, Materials at High Temperatures (2019) 1–16.Google Scholar
  27. [27]
    C. Y. Chi, H. Y. Yu, J. X. Dong, W. Q. Li, S. C. Cheng, Z. D. Liu and X. S. Xie, The precipitation strengthening behavior of Cu-rich phase in Nb contained advanced Fe-Cr-Ni type austenitic heat resistant steel for USC power plant application, Progress in Natural Science: Materials International, 23 (3) (2012) 175–185.CrossRefGoogle Scholar
  28. [28]
    Y. Li, Y. Yang, Y. Wu, L. Wang and X. Liu, Quantitative comparison of three Ni-containing phases to the elevatedtemperature properties of Al-Si piston alloys, Materials Science and Engineering A, 527 (26) (2010) 7132–7137.CrossRefGoogle Scholar
  29. [29]
    S. Yang, X. Ling and Y. Zheng, Creep behaviors evaluation of Incoloy800H by small punch creep test, Materials Science and Engineering A, 685 (2017) 1–6.CrossRefGoogle Scholar
  30. [30]
    A. O. Mariscal, M. L. S. Munoz, Naveena and S. Komazaki, Application of small punch creep testing for evaluation of creep properties of as-received, Materials Science and Engineering A, 709 (2018) 322–329.CrossRefGoogle Scholar

Copyright information

© KSME & Springer 2019

Authors and Affiliations

  1. 1.Graduate School, Department of Mechanical EngineeringChung-Ang UniversitySeoulKorea
  2. 2.Department of Mechanical EngineeringChung-Ang UniversitySeoulKorea

Personalised recommendations