Materials pp 77-84 | Cite as

Effect of Hydrogen Charging on Ambient and Cryogenic Mechanical Properties of a Precipitate-Strengthened Austenitic Steel

  • Luming Ma
  • Guojun Liang
  • Yiyi Li
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 38)

Abstract

The method of high-pressure hydrogen charging was used to charge hydrogen into smooth and notched tensile specimens of γ′ precipitate-strengthened austenitic steel JBK-75. The hydrogen content in the charged specimens was 25.2 ppm (by weight). In the test temperature range 293 to 77 K, hydrogen had no obvious effect on strength, but it caused some decrease in ductility at 223 to 295 K. The steel is not notch sensitive, and hydrogen charging had little effect on notch sensitivity at ambient and low temperatures. With decreasing temperature, both strength and ductility increased, and hydrogen damage greatly decreased. Increasing the aging temperature and time tends to increase the hydrogen damage of the steel, but hydrogen had less effect on aged strength. The steel that had been given an appropriate heat treatment had excellent cryogenic mechanical properties and resistance to hydrogen damage. The steel had very stable microstructure at low temperatures; no phase transition occurred as a result of strain and hydrogen at 293 to 77 K. Fine grain and fine γ′ precipitates decreased hydrogen damage; the presence of ŋ phase at grain boundaries increased hydrogen damage.

Keywords

Tensile Specimen Aging Temperature Hydrogen Embrittlement Cryogenic Temperature Hydrogen Charge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. W. Thompson and J. A. Brooks, Hydrogen performance of precipitation-strengthened stainless steels based on A-286, Metall. Trans. 6A: 1431 (1975).CrossRefGoogle Scholar
  2. 2.
    A. W. Thompson, Hydrogen-induced ductility loss in commercial precipitation-strengthened stainless steels, Metall. Trans. 7A: 315 (1976).Google Scholar
  3. 3.
    B. C. Odegard, Jr. and A. J. West, The effect of q phase on the hydrogen compatibility of a modified A-286 superalloy: microstructural and mechanical properties observations, in: Proceedings, International Conference on Hydrogen Effects in Metal, vol. 597 (1980).Google Scholar
  4. 4.
    P. D. Hicks and C. J. Altstetter, Internal hydrogen effects on tensile properties of iron-and nickel-base superalloys, Metall. Trans. 21A: 365 (1990).CrossRefGoogle Scholar
  5. 5.
    M. Kuribayashi and H. Okabayashi, Influence of heat treatment conditions on mechanical properties of hydrogenated type 304 stainless steel at low temperature, Trans. Jap. Inst. Met. 25: 623 (1984).Google Scholar
  6. 6.
    J. Glazer, S. L. Verzasconi, R. R. Sawtell, and J. W. Morris, Jr., Mechanical behavior of aluminum-lithium alloys at cryogenic temperatures, Metall. Trans. 18A: 1659 (1987).Google Scholar
  7. 7.
    Y. Y. Li, L. M. Ma, and G. J. Liang, The effect of high-pressure charging with hydrogen on mechanical properties of an austenitic steel, Chin. J. Met. Sci. Technol. 3: 74 (1987).Google Scholar
  8. 8.
    L. M. Ma, Y. Y. Li, and G. J. Liang, Effect of hydrogen on 21–7–9 austenitic steel at low temperature, in: Advances in Cryogenic Engineering—Materials, vol. 34, Plenum, New York (1988), p. 325.Google Scholar
  9. 9.
    J. W. Kaufman, G. T. Sha, R. F. Kohn, and R. J. Bucci, “Cracks and Fracture,” ASTM STP 601, American Society for Testing and Materials, Philadelphia (1976), p. 169.Google Scholar
  10. 10.
    L. M. Ma, J. K. Han, R. L. Tobler, R. P. Walsh, and R. P. Reed, Cryogenic fatigue of high-strength aluminum alloys and correlations with tensile properties, in: Advances in Cryogenic Engineering—Materials, vol. 36, Plenum, New York (1990), p. 1143.Google Scholar

Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Luming Ma
    • 1
  • Guojun Liang
    • 1
  • Yiyi Li
    • 1
  1. 1.Institute of Metal ResearchAcademia SinicaShenyangChina

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