Jungho Choe

Heat-Treatment-Induced Deformation Shift in LPBF-Fabricated Heterogeneous Microstructured Al–Zn–Mg–Cu Alloys

Jungho Choe, Ji‐Hun Yu, Jina Kwak

This study investigated the effect of T6 heat treatment on the tensile properties and deformation behavior of heterogeneous microstructured Al–Zn–Mg–Cu alloys fabricated by laser powder bed fusion. In the as-built state, pronounced microstructural heterogeneity, including non-uniform precipitate distributions and solute segregation concentrated …

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Effect of ZrB2 particle addition on strength-ductility improvement of Al–4Fe matrix composites by laser power bed fusion

Jungho Choe, K. H. Kim, Jeong Min Park, Ji Hun Yu et autres

This study explores the effect of ZrB 2 particle addition on the microstructure and mechanical properties of Al–4Fe alloys fabricated by laser powder bed fusion (LPBF). High-melting-point, chemically stable ZrB 2 particles were incorporated to simultaneously improve mechanical strength and ductility of …

kr, jp (code pays fourni par la source)

Ti-induced microstructural evolution and mechanical enhancement in Al7075 alloy fabricated by laser powder bed fusion

Soobin Kim, Dongmin Jang, M.M. Lee, Jungho Choe et autres

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Hot isostatic pressing-driven fine-tuning of electrical properties in p- and n-type (Bi,Sb)2Te3 thermoelectric materials

Seungki Jo, Jeong Min Park, Linh Vu Ba, Haeum Park et autres

Hot isostatic pressing (HIP) is generally used for densification of powders in thermoelectric materials, yet its potential for tuning electrical properties remains underexplored. Herein, we employ hot isostatic pressing as a post-processing for fine-tuning the electrical properties of sintered p - and …

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Leveraging microstructural design to enhance strain hardening in porous CoCrFeMnNi high-entropy alloy fabricated by material extrusion additive manufacturing

Do Won Lee, Jeong Ah Lee, Hyojin Park, Rae Eon Kim et autres

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Restructuring the cell network of non-equiatomic CoCrFeNiMoC medium-entropy alloy fabricated by laser powder bed fusion

Hyeonseok Kwon, Eun Seong Kim, Yoon‐Uk Heo, Jungho Choe et autres

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Characterization of the Manufacturing Process and Mechanical Properties of CoCrFeMnNi High-Entropy Alloys via Metal Injection Molding and Hot Isostatic Pressing

Eun Seong Kim, Jae Man Park, Do Won Lee, Hyojeong Ha et autres

High-entropy alloys (HEAs) have been reported to have better properties than conventional materials; however, they are more expensive due to the high cost of their main components. Therefore, research is needed to reduce manufacturing costs. In this study, CoCrFeMnNi HEAs were prepared …

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Synergistic strengthening of crack-free Al–Zn–Mg–Cu alloys with hierarchical microstructures achieved via laser powder bed fusion

Jungho Choe, Kyung Tae Kim, Jeong Min Park, Hyomoon Joo et autres

Crack-free Al–Zn–Mg–Cu alloy, processed by laser powder bed fusion, displays a characteristic microstructure comprising fine equiaxed grains (EGs) and coarse columnar grains (CGs). Notably, the CGs show a high hardness compared to EGs due to the high density of in-situ precipitates. Analysis …

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Cryogenic tensile behavior of carbon-doped CoCrFeMnNi high-entropy alloys additively manufactured by laser powder bed fusion

Haeum Park, Hyeonseok Kwon, Kyung Tae Kim, Ji‐Hun Yu et autres

Cryogenic tensile behaviors of carbon-doped CoCrFeMnNi high-entropy alloy (C-HEA) printed by laser powder bed fusion (LPBF) were systematically explored. The LPBFed C-HEA exhibits excellent cryogenic tensile properties with not only high yield strength but also largely extended elongation as compared to those …

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Tailoring deformation-induced martensitic transformation through cellular engineering in laser powder bed fusion processed 316L stainless steel

Sang Guk Jeong, Eun Seong Kim, Hyeonseok Kwon, Soung Yeoul Ahn et autres

kr, jp, in (code pays fourni par la source)

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

Jeong Min Park, Hyeonseok Kwon, Jungho Choe, Kyung Tae Kim et autres

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Prediction of Crack Density in additive manufactured AA7075 Alloy Reinforced with ZrH2 inoculant via Response Surface Method

Jeong‐Ah Lee, Jungho Choe, Hyoung Seop Kim