Fatigue crack growth behavior of hybrid and prealloyed sintered steels. Part II. Fatigue behavior

X. Deng, G. Piotrowski, Nikhilesh Chawla, K. S. Narasimhan

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Powder metallurgy (P/M) steels will encounter fatigue loading in service. A fundamental understanding of porosity and steel matrix microstructure on fatigue behavior is important. In this paper, the fatigue crack growth behavior of hybrid and prealloy Ni-Mo P/M steels was investigated. The density of P/M steels was varied from 7.0 to 7.6 g/cm3. The relationship between microstructure and fatigue crack growth was investigated in detail. The density, matrix microstructure, and the degree of pore clustering had a significant effect on the crack growth behavior. The crack closure and two parameters (static: Kmax and cyclic: ΔK) were employed to describe and explain the fatigue behavior of the steels.

Original languageEnglish (US)
Pages (from-to)28-38
Number of pages11
JournalMaterials Science and Engineering A
Volume491
Issue number1-2
DOIs
StatePublished - Sep 15 2008

Keywords

  • Fatigue crack growth
  • Powder metallurgy
  • Steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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