Cell boundary engineering of ferrous medium-entropy alloy fabricated by laser powder bed fusion

JM Park, H Kwon, J Choe, KT Kim, JH Yu, YU Heo… - Scripta Materialia, 2023 - Elsevier
The concept of cell boundary (CB) engineering was proposed to explore the potential
benefits of segregation engineering in obtaining superior mechanical properties in materials …

Heterostructured alloys with enhanced strength-ductility synergy through laser-cladding

RE Kim, ES Kim, GM Karthik, GH Gu, SY Ahn, H Park… - Scripta Materialia, 2022 - Elsevier
Heterostructuring has recently become a popular option to provide an excellent combination
of strength and ductility in alloys. However, its production is a challenging multi-step …

Ultrahigh cryogenic strength and ductility in a duplex metastable ferrous medium-entropy alloy

Q Gao, R Wei, S Feng, C Chen, Z Han, L Chen, T Wang… - Scripta Materialia, 2023 - Elsevier
This work presents a unique low-cost Fe 62 Co 5 Ni 10 Cr 13 Si 7 Al 3 (at%) medium-
entropy alloy (MEA) with ultra-high strength and ductility. A duplex partially recrystallized …

Tailoring microstructure with spatial heterogeneity in CoCrFeMnNi high-entropy alloy via laser surface relaxation

GH Gu, RE Kim, J Lee, HS Kim - Materials Science and Engineering: A, 2022 - Elsevier
The face-centered cubic single-phase CoCrFeMnNi equi-atomic HEA has excellent
mechanical properties in a wide temperature range, from cryogenic to room temperature …

On the low-cycle fatigue behavior of a multi-phase high entropy alloy with enhanced plasticity

A Radi, S Sajadifar, SV Seyedmohammadi… - International Journal of …, 2023 - Elsevier
A multi-phase non-equiatomic FeCrNiMnCo high entropy alloy (HEA) was fabricated using
vacuum induction melting. Thermo-mechanical treatments consisting of cold rolling and …

Fabrication of multi-gradient heterostructured CoCrFeMnNi high-entropy alloy using laser metal deposition

GH Gu, ES Kim, H Kwon, S Son, RE Kim, TG Oh… - Materials Science and …, 2022 - Elsevier
Heterostructured materials have superior strength–ductility behavior than conventional
homogenous materials. In this study, a multi-gradient heterostructured CoCrFeMnNi high …

[HTML][HTML] Multi-layered heterostructured CoCrFeMnNi high-entropy alloy processed using direct energy deposition and ultrasonic nanocrystalline surface modification

GH Gu, RE Kim, ES Kim, J Lee, A Amanov… - Journal of Materials …, 2022 - Elsevier
The advantages of heterostructured materials as structural materials include superior
mechanical properties and the ability to tailor the strength-ductility combination via …

Work hardening behavior of hot-rolled metastable Fe50Co25Ni10Al5Ti5Mo5 medium-entropy alloy: in situ neutron diffraction analysis

H Kwon, S Harjo, T Kawasaki, W Gong… - … and Technology of …, 2022 - Taylor & Francis
Metastability engineering is a strategy to enhance the strength and ductility of alloys via
deliberately lowering phase stability and prompting deformation-induced martensitic …

Effect of Mo addition on the microstructure and high-specific tensile strength of Fe–Mn–Al–Ni–C ferrous medium-entropy alloy

H Kwon, GH Gu, ES Kim, J Wang, S Son, A Kim… - Materials Science and …, 2024 - Elsevier
Molybdenum (Mo) is known to play various roles in ferrous materials, including promoting
lattice distortion and forming different types of precipitates. In this study, Mo was added to the …

Molecular dynamics simulation of phase transition and crack propagation in metastable high entropy alloy

L Ya-zhou, L Yun, S Shuo, S Yan-yu… - Materials Today …, 2022 - Elsevier
Crack propagation mechanisms and phase transformation play a crucial role in improving
the formability of metastable high-entropy alloys (HEA). In this study, a multi-component …