Plastic behavior of a nickel-based alloy under monotonic-tension and low-cycle-fatigue loading |
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| Authors: | E-Wen Huang,Rozaliya I. Barabash,Yandong Wang,Bjø rn Clausen,Li Li,Peter K. Liaw,Gene E. Ice,Yang Ren,Hahn Choo,Lee M. Pike,Dwaine L. Klarstrom |
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| Affiliation: | 1. Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA;2. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;3. Center for Materials Processing, University of Tennessee, Knoxville, TN 37996, USA;4. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110004, PR China;5. Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;6. X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA;g Department of Technology Engineering, Haynes International Inc., Kokomo, IN 46904, USA |
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| 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. |
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| Keywords: | Plasticity Dislocations In-situ neutron-diffraction Fatigue |
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