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온간 다중공형압연 이후 소둔된 CrMnFeCoNi고엔트로피 합금의 미세조직과 기계적 특성
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최지환, 정휘윤, 임진수랑, 이욱진, 이제인
Korean J. Met. Mater.
2025;63(12):937-945. Published online 2025 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.12.937
Abstract
Designing novel high-entropy alloys (HEAs) with low stacking fault energy has been drawn significant attention for achieving a unique combination of high strength and ductility via transformation-induced plasticity (TRIP) mechanism. However, extensive work hardening of TRIP HEAs have led to the difficulties in metalworking, which required very high thermomechanical processing.....
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이(異)변형률 냉간접합압연에 의해 제조된 AA1050/AA6061 층상판재의 미세조직 및 기계적 특성
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조상현, 허현준, 유효상, 이성희
Korean J. Met. Mater.
2025;63(9):687-699. Published online 2025 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.9.687
Abstract
A cold roll-bonding process using AA1050 and AA6061 sheets with different initial strain levels was applied to fabricate an AA1050/AA6061 layered sheet, which was subsequently annealed at various temperatures ranging from 200 to 400℃. The as-roll-bonded sheet exhibited a typical deformation structure in which the grains were elongated along the.....
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316L 스테인리스강의 미세조직 및 인장 특성에 미치는 PAW 용접 전류와 속도의 영향 및 산세 거동
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권택규, 서혜성, 김성진, 조의제
Korean J. Met. Mater.
2025;63(9):675-686. Published online 2025 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.9.675
Abstract
Inappropriate selection of process parameters in plasma arc welding of 316L stainless steel can induce inhomogeneous microstructures and degraded mechanical properties. In addition, optimization of the pickling process to obtain a high-quality surface remains an industrial requirement. In this study, the influences of plasma arc welding current and speed on.....
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2026 알루미늄 합금에서 사전 변형이 시효 및 기계적 특성에 미치는 영향
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김하늘, 강현우, 장병록, 김희국
Korean J. Met. Mater.
2025;63(7):531-541. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.531
Abstract
This study explores a method to enhance the precipitation hardening of AA 2026, an aluminum alloy superior to AA 2024, which is utilized in aerospace structural applications due to its high specific strength and favorable precipitation hardening characteristics. The objective was to improve the alloy's mechanical properties by applying cold.....
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SOFC 연결재 표면에 균일한 Co 코팅막 형성을 위한 전기도금 공정 조건과 미세조직
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이기영, 최재훈, 신한균, 이효종, 박현, 김정한
Korean J. Met. Mater.
2025;63(7):494-506. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.494
Abstract
Interconnects in solid oxide fuel cells (SOFCs) serve as electrical pathways between individual cells while also separating the fuel and air streams in each cell. For SOFCs operating at low temperatures (600 ~ 800
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C), ferritic stainless steel with high Cr content is commonly used as the interconnect material. However,.....
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고온 압출 공정으로 제조된 Al3102 합금 납작관의 미세조직, 부식 및 기계적 특성
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황원구, 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
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SCR420H강의 질화 화합물 형성 및 성장거동
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이원범, 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
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o
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원자로압력용기용 Mn-Mo-Ni계 저합금강 전자빔용접부의 용접후열처리 조건에 따른 미세조직과 기계적 특성의 변화
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이승욱, 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.....
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Sn 조성 변화가 Cu-Sn 브레이징 접합부의 응고조직과 균열에 미치는 영향
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문병록, 유성훈, 이병휘, 홍원식, 정진욱, 강남현
Korean J. Met. Mater.
2025;63(5):370-379. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.370
Abstract
Solidification cracking in brazed joints is significantly influenced by solidification conditions and alloy composition, making it a critical factor for the reliability of parts and products. Numerous studies have been conducted to predict solidification cracking in processes like casting, welding, and joining, leading to the development of an index to.....
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다이어프램 밸브용 Co계 초합금 냉간 압연재의 상온 인장 특성에 대한 강화 메커니즘 연구
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박정현, 송노건, 최재호, 강두홍, 이기안
Korean J. Met. Mater.
2025;63(5):319-329. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.319
Abstract
Cold-rolled Co-Cr-Ni alloy (Elgiloy) and Co-Ni-Cr alloy (SPRON 510) can be considered for diaphragm valve materials in gas valve systems. In this study, the effect of direct aging (DA) heat treatment on the tensile properties of Co-based alloys was investigated and the influence of microstructural changes on the tensile behavior.....
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열간 압연된 AZMX1100 합금의 기계적물성에 미치는 열처리 영향
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박태연, 최인철
Korean J. Met. Mater.
2025;63(4):305-317. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.305
Abstract
In this study, to investigate the evolution of microstructure and texture, as well as their effect on mechanical properties of AZMX1100 magnesium alloy, AZMX1100 plates were manufactured using the TRC (Twin roll casting) method, which is one of the continuous casting methods With TRC it is possible to reduce the.....
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Korean J. Met. Mater.
2025;63(4):271-280. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.271
Abstract
This study investigates the application of a unidirectional pulsating traveling magnetic field (UPTMF) for the semi-continuous casting of high-strength aluminum alloy 7075 slabs (350×150 mm). The experimental setup involved a comparative analysis of direct chill (DC) casting and electromagnetic stirring (EMS) with a 5 Hz amplitude modulated U-PTMF and 22.5.....
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AZ31, Al5052, Cu 미세조직이 전자파 차폐 효과에 미치는 영향
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김경택, 김성제, 강민혁, 이상봉
Korean J. Met. Mater.
2025;63(3):224-230. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.224
Abstract
With the widespread use of electronic devices in the telecommunications industry, exposure to electromagnetic waves has largely increased in the last decades. In addition to concerns about heath issues caused by an accumulative exposure to electromagnetic waves, electromagnetic interference causes malfunctions in complex electronic devices and degrades signal quality. The.....
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Web of Science 1
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S 첨가 및 시효열처리에 의한 오스테나이트계 경량철강의 절삭성 변화에 관한 연구
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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.....
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Ce 첨가가 Ti-6Al-4V 합금의절삭성에 미치는 영향
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김나영, 이욱진, 박찬희
Korean J. Met. Mater.
2025;63(1):75-84. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.75
Abstract
Ti alloys are difficult to machine, accounting for 50-75% of the final component price, necessitating urgent improvements in machinability to increase their demand in several fields. This study found that adding small amounts of Ce (0.1-2.0wt.%) significantly improves the machinability of Ti-6Al-4V alloy. Here, we systematically analyzed microstructural changes due.....
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Web of Science 1
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STS316L을 사용한 L-DED 적층 제조 공정에서의 분말 공급 밀도에 따른 기계적 물성 및 미세구조 변화
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정재호, 조민철, 이근호, 박이주
Korean J. Met. Mater.
2025;63(1):11-22. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.11
Abstract
Laser Directed Energy Deposition (L-DED) is a notable additive manufacturing method in which metal powder is sprayed through a nozzle and then consolidated layer by layer using a laser. Unlike other additive manufacturing processes, DED has fewer constraints on the size of the fabricated parts, making it advantageous for the.....
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Web of Science 1
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직접용융증착 중 스캔 전략에 따른 18Ni300 마레이징강의 미세조직 및 기계적 특성
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주수빈, 노건우, 정영훈, 백민재, 이동준, 김정기
Korean J. Met. Mater.
2025;63(1):1-10. Published online 2025 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.1.1
Abstract
Although the laser scan strategy does not affect the energy density of laser-based additive manufacturing, changes in laser scan direction critically influence the residual stress and microstructure of metallic components. However, only a limited number of studies have investigated the role of laser scan strategy on the microstructure and mechanical.....
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Web of Science 1
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유적지 출토 청동용기의 합금 조성과 제작기술 변화
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김소진, 김영도
Korean J. Met. Mater.
2024;62(12):996-1005. Published online 2024 Nov 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.12.996
Abstract
The purpose of this study is to analyze the components and observe the microstructure of 98 bronze vessels excavated from the Korean Peninsula, where such vessels were widely used, to identify the alloy composition and manufacturing process of bronze artifacts by period. In addition, we attempted to confirm the changing.....
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제조공정에 따른 고려시대 청동용기의 미세조직과 기계적 특성 변화
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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.....
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개량 Al-0.7Mn 합금의 미세조직, 부식 저항성 및 인장 특성
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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,.....
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Web of Science 1
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Ni-Cr-Mo 저합금강에 Ta 합금이 폭발압접된 클래드 계면의 미세조직 및 기계적 특성 고찰
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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.....
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Ni 825/A516-70N 클래드 판재의 용접 방법의 차이에 의한 기계적 특성 평가 및 예측
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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.....
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Web of Science 1
Crossref 1
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금속 용탕 탈성분법 공정에서 Mg 용탕에 첨가된 Al 합금원소가 Mg-Ti 복합재료의 미세조직에 미치는 영향
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장지은, 주수현, 박성혁
Korean J. Met. Mater.
2024;62(10):820-826. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.820
Abstract
This study investigates the effect of adding Al to Mg molten metal on the microstructural characteristics and hardness of Mg-Ti composites fabricated via a liquid metal dealloying (LMD) process. The addition of Al to the Mg melt significantly reduces the dealloying rate of Cu in a Ti
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Cu
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precursor during LMD......
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Web of Science 3
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Korean J. Met. Mater.
2024;62(10):749-756. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.749
Abstract
The drawing process severely deforms commercial AA1070 alloy for electrical wire, reducing a rod from a diameter of 2.0 mm to 0.4 mm, followed by annealing. The annealing process was conducted at various temperatures ranging from 200℃ to 450℃, with each temperature maintained for 1hour. The effects of increasing annealing.....
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Web of Science 2
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Bi가 첨가된 Sn-2.5Ag-0.8Cu-0.05Ni-1Bi 및 Sn-0.75Cu-0.065Ni-1.5Bi 솔더 합금의 응고 거동 및 기계적 특성과 형성 접합부의 미세구조
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이혜민, 문정탁, 이영우, 김휘중, 이슬기, 이종현
Korean J. Met. Mater.
2024;62(7):511-523. Published online 2024 Jun 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.7.511
Abstract
To form excellent solder joints in both thermal cycling and drop tests, Sn-2.5Ag-0.8Cu-0.05Ni-1Bi and Sn-0.75Cu-0.065Ni-1.5Bi composition solder balls were developed. In this study, undercooling and solidification characteristics of the alloys, resulting microstructural changes, the solid solution effect of Bi, physical properties, and interfacial reaction properties were investigated and compared with.....
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Web of Science 1
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Fe 함유 Al-10Si-Mg 주조 합금의 미세조직, 인장 및 열전도도 특성에 미치는 과열 처리의 효과
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장진혁, 강태훈, 어광준, 조영희, 이기안
Korean J. Met. Mater.
2024;62(5):402-410. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.402
Abstract
In this study, we designed and manufactured a new Fe-bearing Al-10Si-Mg casting alloy (F alloy) and investigated its microstructure, mechanical properties, and thermal conductivity. Two types of Fe-bearing Al-10Si-Mg alloys were used: the Conventional-F alloy, injected at 720 ℃ and cooled by water quenching, and the Superheated-F alloy, heated to.....
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통일신라 청동용기류의 제작기술 고찰: 부여 관북리 백제유적 출토 유물을 중심으로
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김소진, 한우림, 김영도
Korean J. Met. Mater.
2024;62(5):393-401. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.393
Abstract
Archaeological excavations in Buyeo had revealed Bronze vessels interred within a hole in the building at the Gwanbuk-ri site. These bronze vessels are dated to the Unified silla period (9-10th centuries). To identify the bronze vessels’ manufacturing technology, metallurgical analyses were carried out using Optical Microscopy, SEM-EDS and EPMA. The.....
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Crossref 2
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방전 플라즈마 소결법으로 제조된, AlN-MgO 소결체의 미세구조와 열적, 기계적 특성
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모한첸, 정명진, 안정원, 신승용, 박윤휘, 김선래, 남수용, 이우재, 권세훈
Korean J. Met. Mater.
2024;62(5):367-376. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.367
Abstract
AlN-MgO composites with different compositions were prepared by spark plasma sintering, and the effects of their composition on their microstructure, thermal properties, and mechanical properties were systemically investigated. MgO compositions in the AlN-MgO composites were controlled from 20 to 80 wt%. The results indicated that a phase transition did not.....
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Web of Science 2
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선택적 레이저 용융 Ti6Al4V-Equine Bone 나노 복합재료의 마찰 및 마모 특성
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김세희, 배수현, 박상배, 선우훈, 신세은
Korean J. Met. Mater.
2024;62(5):351-359. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.351
Abstract
Ti6Al4V is commonly used in implants because of its excellent mechanical properties, corrosion resistance, and biocompatibility. While Hydroxyapatite (HAp) is typically used for strong biological bonding between Ti6Al4V implants and bone tissue, this study takes a different approach by incorporating Equine Bone (EB), which has a chemical structure similar to.....
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Web of Science 3
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금속산화물 분말의 수소환원에 의한 W-Ni-Cu 합금분말의 합성
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허연지, 이의선, 최지원, 변종민, 오승탁
Korean J. Met. Mater.
2024;62(5):334-339. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.334
Abstract
The effect of powder processing on the microstructure and sinterability of the heavy alloy W-Ni-Cu was investigated. The heavy alloy powders were prepared by the ball milling and hydrogen reduction of metal oxide powders. As the milling time increased, the size of the powder mixture decreased and at 5 h.....
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