In-situ heating observations on microstructure relaxation of ultrafine-grained high-entropy alloys using neutron diffraction and laser-scanning confocal microscopy
نویسندگان
چکیده
Abstract. The thermal stability of ultrafine-grained metals can be fully understood when observing time-resolved microstructural changes over multiple-length scales. global relaxation behavior upon heating an (UFG) CoCrFeNi high-entropy alloy (HEA) was characterized by in-situ neutron diffraction measurements. Before heating, the nanocrystalline microstructure introduced applying high-pressure torsion (HPT), leading to severe lattice distortion excess dislocations and defects. sequential information on structural recovery, recrystallization, grain growth are identified analysis defining texture development, linear expansion, stress behaviors UFG HEA with increasing temperature up 1300K. By contrast, processed HPT often inhomogeneous microstructurally compositionally. influence such inhomogeneity macro-scale is monitored using HPT-processed CoCrFeNiMn through laser-scanning confocal microscopy. This study emphasizes importance characterization techniques for further in-depth exploration SPD-processed structure.
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ژورنال
عنوان ژورنال: Materials research proceedings
سال: 2023
ISSN: ['2474-3941', '2474-395X']
DOI: https://doi.org/10.21741/9781644902615-27