Abstract
An equal-molar CoCrFeMnNi, face-centered-cubic (fcc) high-entropy alloy (HEA) and a nickel-based superalloy are studied using in situ neutron diffraction experiments. With continuous measurements, the evolution of diffraction peaks is collected for microscopic lattice strain analyses. Cyclic hardening and softening are found in both metallic systems. However, as obtained from the diffraction-peak-width evolution, the underneath deformation mechanisms are quite different. The CoCrFeMnNi HEA exhibits distinct lattice strain and microstructure responses under tension-compression cyclic loadings.
Original language | English |
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Article number | 420 |
Number of pages | 8 |
Journal | Crystals |
Volume | 9 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2019 |
Keywords
- in-situ neutron diffraction
- low-cycle fatigue
- high entropy alloy
- Ni-based superalloy
- CRACK GROWTH-BEHAVIOR
- FATIGUE BEHAVIOR
- NEUTRON-DIFFRACTION
- DEFORMATION
- TEMPERATURE
- DISLOCATION
- EVOLUTION
- STRESS
- METALS