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Research Papers
1 Mechanical Properties and Microstructural Evolutions of High-Pressure Torsion-Processed Al7068 Alloy
고압비틀림 공정 처리된 Al7068 합금의 기계적 특성 및 미세조직 변화
Juhee Oh, Sujung Son, Hyoung Seop Kim, Jae Bok Seol, Hyokyung Sung, Jung Gi Kim
오주희, 손수정, 김형섭, 설재복, 성효경, 김정기
Korean J. Met. Mater. 2023;61(1):1-8.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.1

Abstract
The combination of severe plastic deformation, deformational heat, and frictional heat generated during the high-pressure torsion process has a great effect on microstructural evolutions, including grain refinement, dynamic recrystallization and recovery. In particular, the low melting temperature metallic alloys (e.g., aluminum and magnesium) also induce nano-precipitations in the matrix during..... More

                        
10.3365/KJMM.2023.61.1.9s
9 Effect of Fe-Cr-B on the Microstructure and Mechanical Properties of a Powder Injection Molding Processed Fe-Cr-B/316L Stainless Steel Matrix Composite
분말 사출 성형된 Fe-Cr-B/316L 스테인레스강 복합재료의 미세조직과 기계적 특성에 미치는 Fe-Cr-B의 영향
Young-Kyun Kim, Yeun-Ah Joo, Tae-Shik Yoon, Kee-Ahn Lee
김영균, 주연아, 윤태식, 이기안
Korean J. Met. Mater. 2023;61(1):9-17.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.9

Abstract
Stainless steel-based composites (SMCs) mixed with 316L stainless steel powder and Fe-Cr-B based M alloys powder ed M) powder were manufactured using the powder injection molding (PIM) process, and their microstructure and mechanical properties were investigated. To examine the effect of M content on the properties of SMCs, the M..... More

                        
Research Papers
18 A Study on the Prediction of Characteristics of Molding Sand Using Machine Learning and Data Preprocessing Techniques
기계학습과 데이터 전처리 기법을 활용한 주물사 특성 예측에 관한 연구
Jeong-Min Lee, Moon-Jo Kim, Kyeong-Hwan Choe, DongEung Kim
이정민, 김문조, 최경환, 김동응
Korean J. Met. Mater. 2023;61(1):18-27.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.18

Abstract
The main components of molding sand used in sand casting are sand, clay and water. The composition of the molding sand has a great influence on the properties of the casting. In order to obtain high-quality castings, it is important to manage the components that affect the properties of the..... More

                        
28 Study on Controlling Residual Stress in Thick Copper Film for Heat Sink Using Graphene
방열판용 구리 후막의 잔류응력 제어를 위한 그래핀 효과에 관한 연구
Jeongwoon Bae
배정운
Korean J. Met. Mater. 2023;61(1):28-32.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.28

Abstract
Nowadays, high-density electronic devices and component mounting have gained popularity. Because of the heat generated from these devices, efficiency of the electronic parts is significantly lowered and life time of these devices is considerably shortened. Therefore, it is very important to efficiently dissipate the heat generated from the device to..... More

                        
33 Stable Quantum Dot Light-Emitting Diodes Employing TiO2 Nanoparticles as a Mixed Emission Layer
TiO2 나노입자를 혼합 발광층으로 사용한 장수명 양자점 발광다이오드
Changgi Yoon, Jiwan Kim
윤창기, 김지완
Korean J. Met. Mater. 2023;61(1):33-37.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.33

Abstract
Colloidal quantum dots (QDs) have attractive optical and electrical characteristics for various applications in the display industry. They have superb properties including color tunability, which is achieved by controlling the particle size and solution processes used for quantum dot light-emitting diodes (QLEDs). Here we demonstrate high efficiency QLEDs that consist..... More

                        
38 Approaches to Estimate the Magnitude of Phonon Scattering via Point Defects in Mo(Se1-xTex)2 Thermoelectric Alloys
Mo(Se1-xTex)2 열전합금의 점 결함에 의한 포논 산란 효과 분석
You-Jong Lee, Sang-il Kim, Seong-Mee Hwang, Jeong-Yeon Kim, Won-Seon Seo, Hyun-Sik Kim
이유종, 김상일, 황성미, 김정연, 서원선, 김현식
Korean J. Met. Mater. 2023;61(1):38-45.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.38

Abstract
One of the most popular routes used to improve the thermoelectric performance of materials is to suppress their lattice thermal conductivities. Thermoelectric performance is characterized by a figure-of-merit zT, which is defined as σS2T/(κe + κl), where the σ, S, T, κe, and κl are the electrical conductivity, Seebeck coefficient,..... More

                        
46 Enhanced Thermoelectric Performance of Sn-Doped Permingeatites Cu3Sb1-ySnySe4
Ji-Hee Pi, Go-Eun Lee, Il-Ho Kim
Korean J. Met. Mater. 2023;61(1):46-53.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.46

Abstract
In this study, Cu3Sb1-ySnySe4 (0 ≤ y ≤ 0.08) permingeatites were synthesized via mechanical alloying followed by hot pressing. The phase transformation, microstructure, charge transport parameters of the permingeatites, and their thermoelectric properties were analyzed. The permingeatites were present in a single phase with a tetragonal structure, and secondary phases..... More

                        
54 Fabrication of Self-Healable, Robust, and Superhydrophobic Nanocomposite Films
Siwoo Park, Young-Geun Ha
Korean J. Met. Mater. 2023;61(1):54-59.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.54

Abstract
Despite the recent advances in nature-inspired superhydrophobic surfaces with multifunctional properties such as self-healing, self-cleaning, antibacterial material, anti-biofouling, and oil-water separation in various industrial applications, there have been very few reports of robust superhydrophobic surfaces fabricated via a low-cost method. Herein, we report a rationally designed, self-healable, robust, and superhydrophobic..... More

                        
60 Predicting Grain Structure in Continuously-Cast Stainless Steel Slab
연속주조 스테인리스강 슬라브의 결정립 조직 예측
Hee-Soo Kim, Ji-Joon Kim
김희수, 김지준
Korean J. Met. Mater. 2023;61(1):60-68.   Published online 2022 Dec 28
DOI: https://doi.org/10.3365/KJMM.2023.61.1.60

Abstract
Macrostructural features in continuously-cast stainless steel slabs such as the distribution of equiaxed and columnar grains, and microporosity, are crucial to the post-processes, and the mechanical properties of the final steel products. Among the methods for controlling grain structure during the continuous casting process, the application of electromagnetic stirring (EMS)..... More

                        
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