Journal of Materials Engineering and Performance

, Volume 28, Issue 10, pp 6307–6319 | Cite as

Comparative Evaluation of Creep-Rupture Behavior of P9 Steel Plate and Thick Section Tubeplate Forging

  • B. K. Choudhary
  • Isaac Samuel E. Email author
  • Christopher J. 
  • S. D. Yadav


In the present investigation, creep-rupture behavior of P9 steel in two different product forms of 20-mm plate and 300-mm-thick tubeplate forging has been studied at 793 and 873 K. It has been found that steady-state creep rate and rupture life followed power law dependence on applied stress at low and high stress regimes for both forms of products. At high stress regime, P9 steel plate exhibited better creep strength with respect to tubeplate forging in terms of lower creep rate and higher rupture life at 793 and 873 K. On contrary, both product forms exhibited similar creep rate and rupture behavior in the low stress regime at 873 K. Difference in creep ductility has been found to be insignificant in both product forms. Irrespective of test conditions and product forms, fracture appearance remained transgranular ductile characterized by dimples. The comparative evaluation of creep-rupture properties of both product forms has also been described in terms of creep rate-rupture life relationships of Monkman–Grant type, creep damage tolerance and tertiary creep characteristics at 793 and 873 K.


creep damage P9 steel rupture life steady-state creep rate tubeplate forging 



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Copyright information

© ASM International 2019

Authors and Affiliations

  • B. K. Choudhary
    • 1
    • 2
  • Isaac Samuel E. 
    • 1
    Email author
  • Christopher J. 
    • 1
    • 2
  • S. D. Yadav
    • 1
  1. 1.Materials Development and Technology DivisionIndira Gandhi Centre for Atomic ResearchKalpakkamIndia
  2. 2.Homi Bhabha National InstituteKalpakkamIndia

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