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

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...

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Bibliographic Details
Published in:International journal of plasticity 2008-08, Vol.24 (8), p.1440-1456
Main Authors: Huang, E-Wen, Barabash, Rozaliya I., Wang, Yandong, Clausen, Bjørn, Li, Li, Liaw, Peter K., Ice, Gene E., Ren, Yang, Choo, Hahn, Pike, Lee M., Klarstrom, Dwaine L.
Format: Article
Language:English
Subjects:
Deformation
Dislocations
Evolution
Exact sciences and technology
Fatigue
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Hardening
In-situ neutron-diffraction
Inelasticity (thermoplasticity, viscoplasticity...)
Mathematical analysis
Nickel base alloys
Physics
Plasticity
Softening
Solid mechanics
Stresses
Structural and continuum mechanics
Superalloys
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Summary: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.
ISSN:0749-6419
1879-2154
DOI:10.1016/j.ijplas.2007.10.001