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Volume 62(11); Nov 2024
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Research Papers
837 Corrosion Behavior of SLMed Ti6Al4V-Equine Bone Nanocomposites
Se Hee Kim, Se Eun Shin
Korean J. Met. Mater. 2024;62(11):837-843.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.837

Abstract
Ti6Al4V is one of the most widely used Ti alloys in biomedical applications, such as orthopedic and dental implants, due to its excellent mechanical properties, biocompatibility, and high corrosion resistance. Metal implants require high bonding strength between the implant and bone for long-term use in the human body; Hydroxyapatite (HAp)..... More

                
844 Evaluation and Prediction of Mechanical Properties According to Welding Methods of Ni 825/A516-70N Clad Plates
Ni 825/A516-70N 클래드 판재의 용접 방법의 차이에 의한 기계적 특성 평가 및 예측
Cheolhong Hwang, Jeongseok Oh, Jini Park, Myungwoo Joe, Sunhwan Kim, Kyunghoon Yoo, Sungwoong Kim, Youngjoo Kim, Sangyeob Lee, Joonsik Park
황철홍, 오정석, 박지니, 조명우, 김선환, 유경훈, 김성웅, 김영주, 이상엽, 박준식
Korean J. Met. Mater. 2024;62(11):844-856.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.844

Abstract
In this study, the microstructures and mechanical properties of different methods of FCAW (Flux-cored arc welding) + FCAW or FCAW + GTAW (Gas tungsten arc welding) welding on Ni825/A516-70N clad plate were investigated, using a double U groove angle on a laboratory scale. The amount of specimen deformation with FCAW..... More

                
857 Microstructure Evolution and Mechanical Properties of Ta-Cladded Ni-Cr-Mo Low Alloyed Steel via Explosive Welding
Ni-Cr-Mo 저합금강에 Ta 합금이 폭발압접된 클래드 계면의 미세조직 및 기계적 특성 고찰
Si-Yeon Kim, Tae-Gyeong Kim, Sung-Jin Chang, Dong-Hoon Kim, Sung-Ho Yang, Hyun-Uk Hong
김시연, 김태경, 장성진, 김동훈, 양성호, 홍현욱
Korean J. Met. Mater. 2024;62(11):857-867.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.857

Abstract
The effects of welding variables (stand-off distance and explosive thickness) on the interfacial microstructure evolution and mechanical properties of explosively welded Ta alloy to Ni-Cr-Mo low alloyed steel have been investigated. Regardless of welding conditions (a stand-off distance of 3-5 mm and explosive thickness of 40-80 mm), the Ta/steel interface..... More

                
868 Enhanced Electromagnetic Wave Absorption in Hexaferrite/LSMO Bilayers: Optimization of Structural Design Using a High Frequency Software Simulation
Jae-Hee Heo, Tae-Woo Lee, Young-Min Kang, Sang-Min Lee
Korean J. Met. Mater. 2024;62(11):868-878.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.868

Abstract
In this study, the electromagnetic (EM) wave absorption properties of a two-layered structure composed of La0.7Sr0.3MnO3-epoxy (10 wt.%) (LSMO) and SrFe9.5Co1.25Ti1.25O19-epoxy (10 wt.%) (SFCTO), both exhibiting distinct high-frequency magnetic and dielectric properties, were investigated using a High Frequency Simulation Software (HFSS) simulation tool. LSMO had a high dielectric constant (ε'..... More

                
879 Facile Synthesis and Thermal Stability Enhancement of Sulfurized Polyacrylonitrile for Thermal Battery Cathodes
Dohun Kim, Wonjun Ahn, Jae-Seong Yeo, Yusong Choi, Sangbaek Park
Korean J. Met. Mater. 2024;62(11):879-885.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.879

Abstract
Although sulfide-polyacrylonitrile (SPAN) is considered a promising cathode material for various battery applications, their application in thermal batteries has not yet been explored. Herein we synthesized carbonized SPAN (c-SPAN) to enhance the thermal stability of SPAN and evaluated its application as a cathode for thermal batteries. The efficiency of c-SPAN..... More

                
886 Microstructure, Corrosion Resistance and Tensile Properties of Modified Al-0.7Mn Alloy
개량 Al-0.7Mn 합금의 미세조직, 부식 저항성 및 인장 특성
YuanJiu Huang, Tae-Hoon Kang, Ho-Joon Choi, Young-Chul Shin, Seung-Cheol Lee, Kee-Ahn Lee
황원구, 강태훈, 최호준, 신영철, 이승철, 이기안
Korean J. Met. Mater. 2024;62(11):886-896.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.886

Abstract
A modified alloy (Al-0.7Mn) was designed and fabricated with an increased Mn content up to 0.7wt.% and a controlled Fe content of 0.1wt.% and compared with the conventional Al3102 (Al-0.3Mn) alloy using the air-slip casting process. Both alloys were homogenized at 510°C for 10 hours and then air-cooled. The microstructure,..... More

                
897 Effect of Si on the Yield Strength of Medium-Carbon Steels Consisting of Ferrite and Pearlite
중탄소강의 페라이트-펄라이트 미세조직과 항복강도에 미치는 Si 첨가의 영향
Jae Hyeon Ko, Kyeong-Won Kim, Jae Hoon Jang, Ki-Young Lee, Hyun Park, Jung Han Kim, Jung Won Lee, Yong Hyun Kim, Sung Min Hong, Jun-Yun Kang, Yoon Suk Choi
고재현, 김경원, 장재훈, 이기영, 박현, 김정한, 이정원, 김용현, 홍성민, 강전연, 최윤석
Korean J. Met. Mater. 2024;62(11):897-910.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.897

Abstract
To enhance the intrinsic yield strength of the ferrite-pearlite microstructure that inevitably forms in a non-quenched-and-tempered steel for large structural components, this study analyzed the effect of adding Si. The resulting ferrite-pearlite microstructure in medium-carbon steels was examined, and the resulting increase in yield strength was interpreted based on strengthening..... More

                
911 Changes in Microstructure and Mechanical Properties of Goryeo Dynasty Bronze Vessels with Manufacturing Process
제조공정에 따른 고려시대 청동용기의 미세조직과 기계적 특성 변화
So Jin Kim, Young Do Kim
김소진, 김영도
Korean J. Met. Mater. 2024;62(11):911-919.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.911

Abstract
Bronze vessels are manufactured using casting and forging techniques, and various microstructures can be observed depending on the manufacturing process. In this study, we confirmed mechanical properties and microstructural evolution in the manufacturing process by observing the microstructures and composition analysis of 18 bronze vessels in the Goryeo Dynasty excavated..... More

                
920 Discovery of Alloy Catalysts for Ammonia Decomposition by Machine Learning-Based Prediction of Adsorption Energies
기계 학습 기반 흡착에너지 예측을 통한 암모니아 분해용 합금 촉매 탐색
Byung Chul Yeo, So Yun Jeong, Jun Su Kim, Donghun Kim
여병철, 정소윤, 김준수, 김동훈
Korean J. Met. Mater. 2024;62(11):920-927.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.920

Abstract
Ammonia decomposition has gained significant attention as an eco-friendly method for hydrogen production because it creates no carbon dioxide emissions. While Ru catalysts are known for their high activity in ammonia decomposition, their high cost makes them uneconomical for commercial use. Therefore, it is essential to explore novel alloy catalysts..... More

                
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