A neutron-diffraction study of the low-cycle fatigue behavior of HASTELLOY® C-22HSTM alloy |
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| Affiliation: | 1. Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea;2. Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;3. Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea;4. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA |
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| Abstract: | The HASTELLOY® C-22HSTM alloy is a face-centered cubic (fcc), nickel-based, corrosion-resistant superalloy. In the present study, the low-cycle-fatigue behaviors of the alloy were examined by in situ neutron diffraction at room temperature. The fatigue parameters included a total strain range of Δε = 2% and a strain ratio of R = ?1 (R = εmin/εmax, where εmin and εmax are the applied minimum and maximum strains, respectively). The effect of cyclic deformation on the lattice strains was studied as a function of cyclic straining. The cyclic hardening and softening behaviors during fatigue is discussed in light of the relationship between the peak widths and lattice strains. |
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