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컨볼루션 신경망과 결정소성유한요소해석을 이용한 성형한계도 예측
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이한준, 정재면, 오세혁, 김동규, 김지훈, 이호원
Korean J. Met. Mater.
2025;63(7):542-552. Published online 2025 Jul 1
DOI:
https://doi.org/10.3365/KJMM.2025.63.7.542
Abstract
This paper presents a novel deep learning (DL) approach to predict the forming limit diagrams (FLDs) of sheet metals, addressing the limitations of traditional experimental and numerical simulation methods. By utilizing orientation distribution function (ODF) data and crystal plasticity finite element (CPFE) results, an efficient DL prediction model was developed......
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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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수위의 이미지 분석 알고리즘을 이용한 충전제가 함유된 황가교 EPDM 고분자 복합체의 수소 기체 충전량 및 확산도 측정 방법
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이지훈, 전상구, 최명찬, 김승연
Korean J. Met. Mater.
2025;63(4):291-304. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.291
Abstract
In hydrogen refueling stations, polymer O-rings are used for high-pressure hydrogen containers and transfer pipes to prevent gas leakage. A technology has been developed to measure the hydrogen uptake and diffusivity of the polymer materials used in these O-rings. The process involves charging the polymer material with hydrogen under a.....
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2액실 바이폴라막 전기투석에 의한 폐 Na
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SO
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용액에서 NaOH 재생
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이영재, 서민혁, 안재우
Korean J. Met. Mater.
2025;63(4):281-290. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.281
Abstract
With the recent introduction of various environmental policies focused on carbon neutrality has made recycling a crucial task in the electric vehicle industry. In particular, the recycling of lithium-ion batteries, a critical component of EVs, is becoming increasingly important. The process of recovering valuable metals such as lithium (Li), cobalt.....
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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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인공시효 온도가 자연시효된 Al-Si-Mg 합금의 T6 거동에 미치는 영향
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손현우, 정재은, 조영희, 김수배, 이정무
Korean J. Met. Mater.
2025;63(3):197-202. Published online 2025 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.3.197
Abstract
The artificial aging behavior of Al-Si-Mg alloy naturally aged for 1 hour and 7 days at room temperature was analyzed using hardness, DSC and TEM. The Al-Si-Mg alloy naturally aged for 7 days at room temperature showed a decrease in maximum hardness during artificial aging at 160
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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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TiO
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/Ag/TiO
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박막의 전기적, 광학적, 열적 특성 및 전자파 차폐효과 연구
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김지호, 김유성, 최진영, 이연학, 공영민, 김대일
Korean J. Met. Mater.
2024;62(9):735-739. Published online 2024 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.9.735
Abstract
Transparent TiO
2
single layer and TiO
2
/Ag/TiO
2
(TAT) tri-layer films were deposited by DC and RF magnetron sputter on a polyimide substrate at room temperature. During the TAT deposition, the thickness of the TiO
2
layer was kept at 20 nm, while the Ag interlayer was varied as 10, 15, 20 nm to.....
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Web of Science 1
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ZnS와 SnO 혼합 분말을 열 증발시켜 성장한 팔면체 Zn
2
SnO
4
결정과 육각 원통형 ZnO 결정
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이근형
Korean J. Met. Mater.
2024;62(9):721-725. Published online 2024 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.9.721
Abstract
Octahedron-shaped zinc stannate (Zn
2
SnO
4
) crystals and hexagonal cylinder-like ZnO crystals were synthesized through a simple thermal evaporation method under uncomplicated conditions of air atmosphere. The Zn
2
SnO
4
octahedrons were grown by heating a mixture of ZnS and SnO powders, and the ZnO hexagonal cylinder-like crystals were fabricated by heating mixtures of.....
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은합금 와이어의 팔라듐 함량에 따른 물성 변화와 고습신뢰성
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김상엽, 전성민, 박현준, 김승현, 신종진, 송오성
Korean J. Met. Mater.
2024;62(9):705-712. Published online 2024 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.9.705
Abstract
This study investigated changes in electrical and mechanical properties, as well as the high humidity reliability of 18 μm-diameter silver alloy wires with palladium contents of 1.1, 2.5, 3.0, and 4.0 wt%, for semiconductor packaging. We also compared the formation of Free Air Ball (FAB) and the high humidity reliability.....
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{10-12} 쌍정이 저온 시효 중 Mg-8Al-0.5Zn 합금 압출재의 석출거동에 미치는 영향
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김현지, 김예진, 박성혁
Korean J. Met. Mater.
2024;62(8):662-671. Published online 2024 Jul 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.8.662
Abstract
This study investigates the influence of {10–12} twins on the aging behavior of an extruded Mg–8Al–0.5Zn (AZ80) alloy during aging at 150 °C. The extruded AZ80 alloy is subjected to a compressive strain of 6% along the transverse direction and is subsequently aged at 150 °C. The sample with {10–12}.....
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Web of Science 1
Crossref 1
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hexaferrite 복합체의 전자기파 흡수 특성
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허재희, 강영민
Korean J. Met. Mater.
2024;62(8):645-655. Published online 2024 Jul 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.8.645
Abstract
Mn, Zn, Ni-substituted Z-type hexaferrites, Sr
3
Co
2
Fe
24
O
41
(Sr
3
Co
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Fe
24-x
Mn
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, Sr
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Co
2-y
Zn
y
Fe
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O
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, Sr
3
Co
1-z
Ni
z
ZnFe
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41
), were prepared by sol-gel synthesis processes and their high-frequency magnetic, dielectric and electromagnetic (EM) wave absorption characteristics were investigated. Substituting Mn for Fe by
x
= 0.5 maintained the single-phase Z phase while shifting the μ' , μ″ spectra towards lower.....
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열간압연 공정 조건이 열간압연된 Al-Zn-Mg-Cu-Sc-Zr 합금의 미세조직과 기계적 특성에 미치는 영향
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정민경, 조수연, 이동길, 육승우, 이태호, 이수열, 김수현, 한준현
Korean J. Met. Mater.
2024;62(8):602-612. Published online 2024 Jul 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.8.602
Abstract
7xxx series aluminum alloys possess extremely high cold working yield strength, which make hot working processes essential for component manufacturing. Preheating specimens before or between hot rolling processes significantly affects the mechanical properties of the hot rolled Al alloy sheets, depending on the preheating temperature and time. In this study,.....
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MATLAB을 이용한 Ag Metal-mesh 기반의 투명 전극 특성 분석
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조승택, 신진욱, Walter Commerell, 유대황, 류혜선, 황진영, 김현식, 김상일, 노종욱
Korean J. Met. Mater.
2024;62(6):464-471. Published online 2024 May 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.6.464
Abstract
It is well-known that optical transparence and electric resistance have a trade-off relationship in transparent electrodes. For this reason, developing methods to predict this relation have been important in various fields of academic research as well as for industrial applications. Herein, we suggest a simple method which reveals the relationship.....
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Crossref 1
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Korean J. Met. Mater.
2024;62(6):455-463. Published online 2024 May 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.6.455
Abstract
This research explores how aggregation influences the electrical behavior at both the planar - heterojunction poly(3-hexylthiophene) (P3HT)/SiO2 and P3HT/ZnO nanocrystal (NC) interfaces. The formation of H- and J-type aggregates leads to distinct molecular ordering and packing structures, manifesting as changes in threshold voltage shifts (electrical gating) as well as absorption.....
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Korean J. Met. Mater.
2024;62(4):306-311. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.306
Abstract
In this study, we enhanced the flexural strength of cordierite ceramics by incorporating h-BN (hexagonal boron nitride) nanoparticles, facilitated by the slip casting process. Initially, commercial cordierite powder with an average particle size of 10 mm underwent a ball-milling process to reduce the size to 2.5 mm and simultaneously achieve.....
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Korean J. Met. Mater.
2024;62(4):299-305. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.299
Abstract
To improve the hydrogen-storage properties of Mg
2
Ni, LiBH
4
was added by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Mg
2
Ni-10LiBH
4
was prepared with a composition of 90 wt% Mg
2
Ni + 10 wt% LiBH
4
. The quantity of released hydrogen (H
r
) versus temperature T curve for Mg
2
Ni10LiBH
4
was obtained by heating at.....
More
Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2024;62(4):284-291. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.284
Abstract
: This study investigates the influence of surfactant (sodium dodecyl sulfate, SDS) concentration on the size and optoelectronic properties of poly(3-hexylthiophene) (P3HT) nanoparticles (NPs) synthesized via the mini-emulsion technique. P3HT NPs were fabricated with varying SDS concentrations. The size dependent optoelectronic properties, including the highest occupied molecular orbital (HOMO) and.....
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고신뢰성 적층 세라믹 커패시터를 위한 침식방지형 주석도금액 개발
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구본일, 김준성, 손유진, 민경석, 백성현
Korean J. Met. Mater.
2024;62(3):180-189. Published online 2024 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.180
Abstract
Capacitors not only store and release electricity but selectively conduct alternating current. Among the various types of capacitors, multi-layer ceramic capacitors (MLCCs) have been widely used in automotive, smartphone, and wearable devices because of their compact size and high capacitance capabilities. In this study, we have developed an electrolyte for.....
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알루미늄 5052-H32 합금과 6014-T4 합금의 저항 점 용접 시 용접성 및 미세조직 비교
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전현욱, 김재훈, 김원호, 천주용, 배기만, 이은경, 박영도, 지창욱
Korean J. Met. Mater.
2024;62(1):1-11. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.1
Abstract
This study was performed to compare the resistance spot weldability of Al 5052-H32 alloy and Al 6014-T4 alloy, and the cause of the differences in the weldability was investigated. In general, the surface of the aluminum alloy has an oxide film several nm thick, and local heat input is generated.....
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Web of Science 2
Crossref 2
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DC 마그네트론 스퍼터링에서 입방정 질화붕소 박막의 증착 거동에 미치는 이온 플럭스 변화의 영향
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최영환, 허주열, 백영준
Korean J. Met. Mater.
2023;61(11):824-829. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.824
Abstract
Cubic boron nitride (cBN) thin films were deposited using DC magnetron sputtering, and the effect of the ion flux on the deposition behavior and residual stress of the cBN thin films was investigated. To increase the ion flux, the magnetic force ratio of the central/peripheral permanent magnets inserted in the.....
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Ag 코팅 Cu 플레이크의 산화 억제에 미치는 Ni interlayer 형성 도금욕의 영향
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김지환, 이종현
Korean J. Met. Mater.
2023;61(10):748-759. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.748
Abstract
To suppress Ag dewetting from around 200
o
C in Ag-coated Cu (Cu@Ag) flakes, Ag and Ni-coated Cu (Cu@Ni@Ag) flakes were fabricated by successive Ni and Ag electroless plating. The Ni bath type was an important consideration to induce differences in the Ag dewetting and resultant Cu oxidation. An acid Ni.....
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Web of Science 2
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Korean J. Met. Mater.
2023;61(9):694-703. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.694
Abstract
Wet chemical analysis techniques for four elements (M = As, Pb, Sb, and Sn) in Ag – M binary alloys were investigated with emphasis on the choice of solvent acid and the characteristic wavelength used in the ICP-AES (Inductively-Coupled Plasma Atomic Emission Spectrometer) analysis. The elements are representative tramp elements.....
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Web of Science 2
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Korean J. Met. Mater.
2023;61(9):652-658. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.652
Abstract
A cold roll-bonding (CRB) process is applied to study the effects of stacking number on the microstructure and mechanical properties of roll-bonded and age-treated Al sheets. Commercial AA1050 and AA6061 sheets with a thickness of 2 mm were stacked alternately on each other to two and four layers, and roll-bonded.....
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Web of Science 6
Crossref 7
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COMSOL을 활용한 신 마그네슘 전해 공정 수치해석 모델 개발
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조매현, 정형준, 강정신, 장근옥
Korean J. Met. Mater.
2023;61(8):625-631. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.625
Abstract
Magnesium (Mg) has good physical properties including light weight, excellent specific strength and high stiffness, and Mg is used in many fields. But current production methods of Mg have disadvantages, such as the generation of sulfur oxide and chlorine gas. In this situation, The Korea Institute of Geoscience and Mineral.....
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Web of Science 6
Crossref 6
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딥코팅 방법을 활용한 게이트 산화물 유전체 및 반도체 박막의 제조 및 박막트랜지스터 응용
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김용완, 하영근
Korean J. Met. Mater.
2023;61(8):581-588. Published online 2023 Jul 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.581
Abstract
The potential applications of advanced electronic materials in large-area, printable, and flexible electronics have generated significant interest. However, creating high-performance, low-voltage thin-film transistors (TFTs) for these applications remains difficult due to a lack of advanced gate dielectric and semiconductor materials that meet both ease-of-fabrication requirements and high electrical performance. In.....
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Ti-5Mo-2Fe 합금의 시효처리 조건에 따른 미세조직 변화 및 기계적 특성
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김홍민, 박세영, 이동근
Korean J. Met. Mater.
2023;61(8):545-552. Published online 2023 Jul 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.545
Abstract
Beta-type titanium alloys have a low elastic modulus, excellent cold workability, and are widely used as implant materials. High strength is possible by forming a precipitation in the β-matrix via solution treatment and aging treatment. However, beta titanium alloys require a large amount of beta-stabilizing elements (Fe, Nb, Mo, Ta,.....
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Web of Science 7
Crossref 6
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Korean J. Met. Mater.
2023;61(7):524-533. Published online 2023 Jun 21
DOI:
https://doi.org/10.3365/KJMM.2023.61.7.524
Abstract
A356 cast aluminum alloy contains 7 at.% Si and 0.3 at.% Mg, producing an approximately 50% eutectic microstructure. This high Si content and various casting conditions play a significant role in strengthening A356 alloy, by controlling the eutectic morphology and precipitates of other intermetallic compounds. Understanding how Si-related precipitates and.....
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Web of Science 2
Crossref 2
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