Experimental and modeling results of creep-fatigue life of Inconel 617 and Haynes 230 at 850 °c

Xiang Chen, Mikhail A. Sokolov, Sam Sham, Donald L. Erdman, Jeremy T. Busby, Kun Mo, James F. Stubbins

Research output: Contribution to journalArticle

Abstract

Creep-fatigue testing of Ni-based superalloy Inconel 617 and Haynes 230 were conducted in the air at 850 °C. Tests were performed with fully reversed axial strain control at a total strain range of 0.5%, 1.0% or 1.5% and hold time at maximum tensile strain for 3, 10 or 30 min. In addition, two creep-fatigue life prediction methods, i.e. linear damage summation and frequency-modified tensile hysteresis energy modeling, were evaluated and compared with experimental results. Under all creep-fatigue tests, Haynes 230 performed better than Inconel 617. Compared to the low cycle fatigue life, the cycles to failure for both materials decreased under creep-fatigue test conditions. Longer hold time at maximum tensile strain would cause a further reduction in both material creep-fatigue life. The linear damage summation could predict the creep-fatigue life of Inconel 617 for limited test conditions, but considerably underestimated the creep-fatigue life of Haynes 230. In contrast, frequency-modified tensile hysteresis energy modeling showed promising creep-fatigue life prediction results for both materials.

Original languageEnglish (US)
Pages (from-to)94-101
Number of pages8
JournalJournal of Nuclear Materials
Volume432
Issue number1-3
DOIs
StatePublished - Jan 1 2013

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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