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399 |
Effect of Post-Weld Heat Treatment on the Microstructure and Mechanical Properties of Electron Beam Welded Mn-Mo-Ni Low Alloy Steel for Reactor Pressure Vessels
원자로압력용기용 Mn-Mo-Ni계 저합금강 전자빔용접부의 용접후열처리 조건에 따른 미세조직과 기계적 특성의 변화
Seung Uk Lee, Se-Mi Hyun, Min-Chul Kim, Seokmin Hong, Jong Min Kim, Soo Yeol Lee이승욱, 현세미, 김민철, 홍석민, 김종민, 이수열
Korean J. Met. Mater. 2025;63(6):399-409. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.399
Abstract
This study investigates the effect of electron beam welding (EBW) on SA508 Gr.3 Cl.1 Mn-Mo-Ni low alloy steel, focusing on changes in the microstructural and mechanical properties of the weld and heat-affected zone (HAZ) under various post-weld heat treatment (PWHT) conditions. The rapid cooling inherent in the EBW process led..... More
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410 |
Effect of Process Parameters on Interfacial Reaction and Mechanical Properties of AlSi10Mg and Inconel 625 Joints during Laser Direct Energy Deposition
Chanho Park, Minsu Park, Haeju Jo, Wookjin Lee
Korean J. Met. Mater. 2025;63(6):410-420. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.410
Abstract
The joining of Ni/Al dissimilar metals to exploit the synergetic effect between the unique properties of Ni and Al alloys has been studied for potential applications in various industrial areas. This study investigates the interfacial reaction between deposited AlSi10Mg and an Inconel 625 substrate during the laser direct energy deposition..... More
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421 |
Formation of Compound Layers of Gaseous Nitrided SCR420H Steels
SCR420H강의 질화 화합물 형성 및 성장거동
Won-Beom Lee, Seokwon Son, Young-Min Kim이원범, 손석원, 김영민
Korean J. Met. Mater. 2025;63(6):421-429. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.421
Abstract
In this study, during the manufacturing process for SCR420H steel we attempted to measure the atmosphere during gas nitriding and examine the formation of a compound layer accordingly. For the nitriding process, the processing time was changed at KN (Nitriding potential) 1.2 atm -1/2 at temperatures of 510 and 540 oC..... More
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430 |
Reduction Behavior of Black Mass Recovered from NCM-Based Spent Lithium-ion Batteries in Ar Atmosphere
NCM계 폐리튬이온 배터리에서 회수한 Black Mass의 Ar 분위기 중 환원거동
Jae-Ho Hwang, Sang-Yeop Lee, So-Yeong Lee, Ho-Sang Sohn황재호, 이상엽, 이소영, 손호상
Korean J. Met. Mater. 2025;63(6):430-436. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.430
Abstract
With the growing demand for LIBs (lithium-ion batteries) for EVs (electric-powered vehicles), it will be important to recover valuable metals from spent lithium-ion batteries in the future. The black mass recovered from spent lithium-ion battery contains elements such as Li, Ni, Co, and Mn with C. The carbon in the..... More
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437 |
Development of Volumetric and Manometric Techniques for Measuring Gas Emission Concentration and Diffusivity in Gas Enriched Polymers
Ji Hun Lee, Sang Koo Jeon
Korean J. Met. Mater. 2025;63(6):437-452. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.437
Abstract
Gas sensors are crucial devices in various fields such as industrial safety, environmental monitoring, gas infrastructure including hydrogen use, and medical diagnostics. These sensors precisely measure the presence of gases on-site in different environments to ensure operational safety and efficiency. Designed for high sensitivity, stability, and reliability, gas sensors are..... More
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453 |
Microstructure, Corrosion, and Mechanical Properties of Al3102-Alloy Flat Tube Manufactured via Hot Extrusion
고온 압출 공정으로 제조된 Al3102 합금 납작관의 미세조직, 부식 및 기계적 특성
Yuanjiu Huang, Tae-Hoon Kang, Ho-Joon Choi, Young-Chul Shin, Seung-Cheol Lee, Kee-Ahn Lee황원구, 강태훈, 최호준, 신영철, 이승철, 이기안
Korean J. Met. Mater. 2025;63(6):453-461. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.453
Abstract
This study systematically investigates the microstructure, mechanical, and corrosion properties of hot-extruded Al3102 alloy flat tube, with direct comparisons to as-cast equivalents. Microstructural analysis revealed that both materials primarily consist of an aluminum matrix, with widespread distribution of Al 6(Mn,Fe)-type precipitates in their initial structures. The flat tube exhibited an average..... More
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462 |
An Overview of Laser Wire Directed Energy Deposition (LW-DED) Additive Manufacturing Process Using a Coaxial Laser Heat Source
동축(coaxial) 레이저 열원을 활용한 와이어 에너지 제어 용착(LW-DED) 적층제조 공정의 개요와 연구동향
Ukju Gim, Sehun Kim, Taehoo Kang, Jongik Lee, Sanghee Jung, Jimin Han, Hyub Lee, Bin Lee김욱주, 김세훈, 강태후, 이종익, 정상희, 한지민, 이협, 이빈
Korean J. Met. Mater. 2025;63(6):462-473. Published online 2025 Jun 5 DOI: https://doi.org/10.3365/KJMM.2025.63.6.462
Abstract
Metal additive manufacturing (AM), often referred to as metal 3D printing, is a promising and widely adopted approach for fabricating intricate components without conventional molds or casting processes. Although powder-based metal AM processes have gained significant recognition for their ability to realize complex shapes, their cost remains a major barrier..... More
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