Plastic behavior of a nickel-based alloy under monotonic-tension and low-cycle-fatigue loading

E-Wen Huang, Rozaliya I. Barabash*, Yandong Wang, Bjørn Clausen, Li Li, Peter K. Liaw, Gene E. Ice, Yang Ren, Hahn Choo, Lee M. Pike, Dwaine L. Klarstrom

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The plastic behavior of an annealed HASTELLOY® C-22HS™ alloy, a face-centered cubic (FCC), nickel-based superalloy, was examined by in-situ neutron-diffraction measurements at room temperature. Both monotonic-tension and low-cycle-fatigue experiments were conducted. Monotonic-tension straining and cyclic-loading deformation were studied as a function of stress. The plastic behavior during deformation is discussed in light of the relationship between the stress and dislocation-density evolution. The calculated dislocation-density evolution within the alloy reflects the strain hardening and cyclic hardening/softening. Experimentally determined lattice strains are compared to verify the hardening mechanism at selected stress levels for tension and cyclic loadings. Combined with calculations of the dislocation densities, the neutron-diffraction experiments provide direct information about the strain and cyclic hardening of the alloy.

Original languageEnglish
Pages (from-to)1440-1456
Number of pages17
JournalInternational Journal of Plasticity
Volume24
Issue number8
DOIs
StatePublished - 1 Aug 2008

Keywords

  • Dislocations
  • Fatigue
  • In-situ neutron-diffraction
  • Plasticity

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