Hyoung Seop Kim
YOU?
Author Swipe
View article: Heterostructure-enabled creep resistance and deformation mechanisms in a new Ni-Co-based high-entropy alloy
Heterostructure-enabled creep resistance and deformation mechanisms in a new Ni-Co-based high-entropy alloy Open
A novel Ni-Co-based high-entropy alloy (HEA) featuring a stable FCC + L12 dual-phase structure was developed to address creep embrittlement at intermediate temperature. By creating heterostructures in the present HEA, the yield strength of…
View article: Fe–N–C surface treatment as method for enhancing spontaneous passivation of low Ni and Cr stainless steel
Fe–N–C surface treatment as method for enhancing spontaneous passivation of low Ni and Cr stainless steel Open
Passivation through cathodic modification has largely remained a theoretical concept due to the reliance on noble metals. In this study, we successfully achieved passivation in AISI 409 L steel, an alloy with reduced Ni and Cr content, by …
View article: Back stress quantification in heterostructured metals: a comparative study of tension-compression and loading-unloading-reloading tests
Back stress quantification in heterostructured metals: a comparative study of tension-compression and loading-unloading-reloading tests Open
The Bauschinger effect, characterized by a reduction in yield stress upon load reversal, plays a critical role in both springback prediction and the understanding of back stress-mediated strengthening in emerging heterostructured materials…
View article: Direct aging effect on the mechanical properties of directed energy deposited CuNiAl-containing low-alloy steel
Direct aging effect on the mechanical properties of directed energy deposited CuNiAl-containing low-alloy steel Open
Although CuNiAl-containing steels can be applied to additive manufacturing owing to their acceptable weldability, only a limited number of studies have investigated. In this study, the mechanical properties of directed energy deposited CuN…
View article: Cryogenic Tensile Strength of 1.6 GPa in a Precipitation-Hardened (NiCoCr)99.25C0.75 Medium-Entropy Alloy Fabricated via Laser Powder Bed Fusion
Cryogenic Tensile Strength of 1.6 GPa in a Precipitation-Hardened (NiCoCr)99.25C0.75 Medium-Entropy Alloy Fabricated via Laser Powder Bed Fusion Open
A (NiCoCr)99.25C0.75 medium entropy alloy (MEA) was developed via laser powder bed fusion (LPBF) using pre-alloyed powder feedstock containing 0.75 at%C, followed by a precipitation heat treatment. The as-built alloy exhibited high density…
View article: Architecture of Ti–6Al–4V thin-walled microthrusters fabricated via laser powder bed fusion
Architecture of Ti–6Al–4V thin-walled microthrusters fabricated via laser powder bed fusion Open
Advances in small-satellite platforms have intensified the demand for microthrusters that offer structural robustness under stringent mass constraints. While laser powder bed fusion (PBF-LB/M) enables the realisation of complex geometries,…
View article: Multiscale computational framework linking alloy composition to microstructure evolution via machine learning and nanoscale analysis
Multiscale computational framework linking alloy composition to microstructure evolution via machine learning and nanoscale analysis Open
Achieving targeted microstructures through composition design is a core challenge in developing structural materials for high-performance applications. This study introduces a multiscale Integrated Computational Materials Engineering (ICME…
View article: Development of 3D interconnected heterogeneous high-entropy alloy composites with enhanced multifunctionality via liquid metal dealloying
Development of 3D interconnected heterogeneous high-entropy alloy composites with enhanced multifunctionality via liquid metal dealloying Open
Liquid metal dealloying (LMD) is a selective extraction method wherein miscible elements are removed from a precursor alloy to obtain a three-dimensional (3D) interconnected structure. This study presents a novel application of this method…
View article: The microstructure-mechanical property relationships in Ti–Cu alloys for biomedical applications: A review
The microstructure-mechanical property relationships in Ti–Cu alloys for biomedical applications: A review Open
In this extensive review, the role of titanium-copper (Ti–Cu) alloys in the biomedical sector is thoroughly examined especially for microstructural and mechanical properties useful to implant applications. Current processing methodologies,…
View article: Remarkable strengthening effects of cells in laser powder bed fusion-processed Inconel 718
Remarkable strengthening effects of cells in laser powder bed fusion-processed Inconel 718 Open
Alloys fabricated via laser powder bed fusion (LPBF) exhibit superior strength. This study investigates the individual strengthening effects of the nanometre-sized cellular and micrometre-sized crystallographic lamellar structures in the L…
View article: Exploring Fe–Mn–Al–C lightweight steels via in-situ alloying in direct energy deposition
Exploring Fe–Mn–Al–C lightweight steels via in-situ alloying in direct energy deposition Open
This study explores the feasibility of in-situ alloying via direct energy deposition (DED) to tailor microstructures and strength-ductility balance of Fe–Mn–Al–C lightweight steels (LWSs) with independently varied composition of 8–12 wt% A…
View article: Enhanced strength and electrical conductivity in pure copper via dynamic offsets and shear force adjustments cryorolling combining annealing
Enhanced strength and electrical conductivity in pure copper via dynamic offsets and shear force adjustments cryorolling combining annealing Open
Asymmetric cryorolling demonstrates significant potential for producing materials with high strength and excellent electrical conductivity. This study presents an innovative Dynamic Offsets and Shear Force Adjustments Cryorolling (DSCR) te…
View article: First-principles and experimental investigations on the mechanical properties of Co particles modified Sn-1.0Ag-0.5Cu solder
First-principles and experimental investigations on the mechanical properties of Co particles modified Sn-1.0Ag-0.5Cu solder Open
This study systematically investigated the influence of Co particles addition on the properties of Sn-1.0Ag-0.5Cu (SAC105) solder through a combined approach of first-principles calculations and experimental characterization. First-princip…