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Research Papers
85 Effect of Gas Pressure on the Oxidation Behavior of Cu and Cu Alloys
구리 및 구리 합금의 산화 거동에 미치는 기압의 영향
Jun Sang Park, Doo-won Kim, Il-Seok Jeong, Eun-Ae Choi, Se Hun Kwon, Seung Zeon Han
박준상, 김두원, 정일석, 최은애, 권세훈, 한승전
Korean J. Met. Mater. 2025;63(2):85-94.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.85

Abstract
This study investigated the effect of gas pressure and alloying elements on the oxidation behavior of copper. Copper alloys containing 1 wt.% of zinc, nickel, or manganese were cast using vacuum induction melting, followed by solution treatment at 400°C for 60 minutes. Oxidation were conducted at 700°C for 60 minutes..... More

    
95 Analysis for Fabrication Conditions of Scalpel with Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 Bulk Metallic Glass Alloys
벌크 비정질 Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 소재를 이용한 수술용 스칼펠(Scalpel) 제작의 최적화 조건분석
J. N. Park, J. S. Oh, S. Lee, C. H. Chung, D. Shin, J. S. Park
박지니, 오정석, 이상엽, 정중희, 신동균, 박준식
Korean J. Met. Mater. 2025;63(2):95-101.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.95

Abstract
This study investigated the manufacturing conditions and properties of Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 amorphous bulk metallic glass (BMG) to examine its applicability for scalpels for medical use. Ti-base BMG alloys have excellent mechanical properties and biocompatibility, making them a suitable scalpel material. In this study, a vacuum suction casting method was used to..... More

    
102 Analysis of Deformation Mechanism Behaviors of Ti-5Mo-1Fe Alloy under Quasi-static and Dynamic Deformation
Ti-5Mo-1Fe 합금의 준정적 및 동적 변형 시 변형 메커니즘 거동 분석
Yong-Jae Lee, Jae-Gwan Lee, Dong-Geun Lee
이용재, 이재관, 이동근
Korean J. Met. Mater. 2025;63(2):102-108.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.102

Abstract
To evaluate the deformation mechanisms of Ti-5Mo-1Fe alloy, compression tests were performed at strain rates ranging from 10-3/sec to 3×103/sec at room temperature. The results showed that Ti-5Mo-1Fe alloy exhibited different deformation mechanisms depending on the strain rate. Under quasi-static strain rates, the Stress-Induced Martensitic (SIM) transformation from the metastable..... More

    
109 The Influence of S Addition and Aging Heat-Treatment on the Machinability in Austenitic Lightweight Steels
S 첨가 및 시효열처리에 의한 오스테나이트계 경량철강의 절삭성 변화에 관한 연구
Chang-Uk Lee, Kyeong-Won Kim, Chang-Hoon Lee, Hyungkwon Park, Seong-Jun Park
이창욱, 김경원, 이창훈, 박형권, 박성준
Korean J. Met. Mater. 2025;63(2):109-120.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.109

Abstract
Machining processes are crucial in industrial applications for shaping steel into specific structural products, and represent a significant portion of the product cost. However, the machinability of lightweight steel is poor, and it exhibits the characteristics of difficult-to-machine materials. This study investigated the effect of adding sulfur on the machinability..... More

    
121 Effect of Repair Welding on Mechanical and Microstructural Behaviors of Heat Affected Zone in HY100 Steels
수정 용접 횟수에 따른 HY100강 용접 열영향부의 기계적 성질과 미세조직 거동
Do-Seob Kim, Jeong-Hyeon Choi, Dong-Hyun Choi, Byung Rok Moon, Su-Kil Park, Namhyun Kang
김도섭, 최정현, 최동현, 문병록, 박수길, 강남현
Korean J. Met. Mater. 2025;63(2):121-131.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.121

Abstract
The mechanical properties and microstructural behaviors of multiple–repaired welds were investigated in the heat affected zone (HAZ) of HY100 steels. Test coupons were prepared from flux cored arc welds at the same location of weldments that had been repaired one, three and five times. The multiple–repaired welding caused continuous high..... More

    
132 Effect of Alloy Elements on Solidification Behavior and Castability in a Directionally Solidified Ni-Based Superalloy
일방향 응고 니켈기 초내열합금에서 합금원소가 응고거동 및 주조성에 미치는 영향
Sanghyeon Park, Jiho Gu, Jehyun Lee
박상현, 구지호, 이재현
Korean J. Met. Mater. 2025;63(2):132-142.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.132

Abstract
IN792, a Ni-based superalloy, exhibits excellent mechanical properties at medium and high temperatures (600~900oC). However, it is known to be very susceptible to casting defects such as hot cracking and hot tearing during casting. This study investigated the effect of alloy elements such as Hf, Zr, and B on the..... More

    
143 Precipitation Behavior and Mechanical Properties of High-Nitrogen Austenitic Stainless Steel According to Chemical Composition and Heat Treatment Temperature
고질소 오스테나이트계 스테인리스강의 화학조성과 열처리 온도에 따른 석출거동 및 기계적 특성
Ki-Hwan Kwon, Seong Hoon Kim, Hyo-Haeng Jo, Jinjong Lee, Heon-Young Ha, Chang-Hoon Lee, Jae-Suk Jeong, Tae-Ho Lee, Nam Hyun Kang
권기환, 김성훈, 조효행, 이진종, 하헌영, 이창훈, 정재석, 이태호, 강남현
Korean J. Met. Mater. 2025;63(2):143-151.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.143

Abstract
The precipitation behavior and mechanical properties of high-nitrogen austenitic stainless steels were investigated for various chemical compositions and solution treatment temperatures. For this study, Fe-22.1Cr-12.2Ni-5.1Mn-2.1Mo alloys with three different sets of Nb, V, and N contents were prepared, and two distinct solution treatment temperatures were applied. An increase in Nb..... More

    
152 Enhanced Photoelectrochemical Performance by Constructing CdS/CdSe Heterojunction Structure
CdS/CdSe 이종접합 구조 형성을 통한 광전기화학적 성능 향상
Dong-gyu Hurh, Jung Hyeun Kim
허동규, 김정현
Korean J. Met. Mater. 2025;63(2):152-160.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.152

Abstract
The growing need for sustainable energy development has become a critical issue due to worsening environmental pollution and climate change. Among the various technologies, the photoelectrochemical technology has been recognized as one of the essential approaches for advancing sustainable energy production. Out of the semiconductor materials used in PEC systems,..... More

    
161 Performance Trade-Off in Nickel-Based Hydrogen Evolution Catalysts for Anion Exchange Membrane Water Electrolysis: Effects of the Nickel Oxidation State and Particle Size
음이온 교환막 수전해용 니켈 기반 수소 발생 반응 촉매의 니켈 산화수 및 입자 크기에 따른 성능 트레이드 오프 연구
Jaehun Lee, Nam In Kim, Song Jin, Junyoung Park, Jun Seok Ha, Chiho Kim, Jooyoung Lee, Yangdo Kim, Sung Mook Choi
이재훈, 김남인, 진송, 박준영, 하준석, 김치호, 이주영, 김양도, 최승목
Korean J. Met. Mater. 2025;63(2):161-167.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.161

Abstract
The development of green hydrogen through anion exchange membrane water electrolysis (AEMWE) is essential for achieving carbon neutrality. Developing non-precious-metal catalysts for the hydrogen evolution reaction (HER) is crucial for the commercialization of AEMWE. In this study, Ni-CeO2/C catalysts were synthesized via a co-precipitation method and a reduction heat treatment..... More

    
168 Facile Electrode Manufacturing Strategy for Ultra-Low Cobalt Consumption in Oxygen Evolution Reaction
Hee Yoon Roh, Ki-Yong Yoon, Jaehoon Jeong, Kyung-Bok Lee, Dohyung Kim, Yangdo Kim, Juchan Yang
Korean J. Met. Mater. 2025;63(2):168-176.   Published online 2025 Feb 5
DOI: https://doi.org/10.3365/KJMM.2025.63.2.168

Abstract
Water splitting is a sustainable method of hydrogen production that is crucial for achieving carbon neutrality. However, the high cost of green hydrogen remains a major challenge. One strategy to reduce costs is the use of non-precious metal catalysts, such as Co, which is known for its excellent catalytic properties...... More

    
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