Fatigue-crack growth of Fe-0.85Mo-2Ni-0.6C steels with a heterogeneous microstructure

George B. Piotrowski, Xin Deng, Nikhilesh Chawla, Kalathur S. Narasimhan, Michael L. Marucci

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Fatigue crack growth of powder metallurgy (P/M) processed steels was investigated. It was found that heterogeneous microstructures play an important role in the fatigue crack behavior of P/M steels. In particular, porosity significantly influences fatigue crack growth. It was also found that an increase in porosity and R-ratio results in a decrease in DKth values. An increase in the R-ratio and porosity increases the monotonic contribution during fatigue due to strain localization between pores at the crack tip.

Original languageEnglish (US)
Pages (from-to)31-41
Number of pages11
JournalInternational Journal of Powder Metallurgy (Princeton, New Jersey)
Issue number1
StatePublished - Jan 1 2005

ASJC Scopus subject areas

  • Metals and Alloys
  • Industrial and Manufacturing Engineering


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