Effect of nickel addition on enhancing nano-structuring and suppressing TRIP effect in Fe40Mn40Co10Cr10 high entropy alloy during high-pressure torsion
نویسندگان
چکیده
The present work unravels the effect of nickel (Ni) addition on deformation mechanism and hardness evolution in a Fe40Mn40Co10Cr10 high entropy alloy (HEA) during high-pressure torsion (HPT) processing. For this purpose, two variants Cantor alloy, with compositions (atomic%) (Ni0 alloy) Fe35Mn35Co10Cr10Ni10 (Ni10 were selected. study revealed transition predominant plasticity Ni from TRIP Ni0 to dislocation slip Ni10 alloy. Such was direct consequence an increase free energy phase transformation, ?G??? towards more positive value addition. Interestingly, showed greater extent nano-structuring than nearly three-fold refined grain sizes, that is, lesser 30 nm ?90 Furthermore, 3–4 times higher density observed FCC compared transformed HCP for any given HPT processing conditions. These differences mechanism(s) manifested as ability added harden itself HPT. suggests large fraction hard originating has lower hardening
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ژورنال
عنوان ژورنال: International Journal of Plasticity
سال: 2022
ISSN: ['1879-2154', '0749-6419']
DOI: https://doi.org/10.1016/j.ijplas.2021.103193