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방열 모듈 적용을 위한 Cu/Sn-3.0Ag-0.5Cu/Al 접합부의 계면 반응 및 접합강도에 미치는 후속 열처리 영향 분석
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정동익, 김가희, 김도헌, 오민철, 김건홍, 박영배
Korean J. Met. Mater.
2024;62(4):312-322. Published online 2024 Mar 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.312
Abstract
The effects of post-annealing times at 150°C on the bonding strength and interfacial characteristics of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Al were systematically evaluated. In the as-bonded sample, Cu
6
Sn
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intermetallic compound (IMC) was formed at the upper Cu/SAC305 interface, while Ag
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Al IMC was formed at the lower SAC305/Al interface, and a black layer of.....
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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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WC-20wt%Co 초경 합금의 미세 조직 변화에 따른 인장 및 피로 성질
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조규섭, 김경일, 노우람
Korean J. Met. Mater.
2023;61(12):933-942. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.933
Abstract
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging dies and cutting tools. The tensile and fatigue properties of WC-20wt%Co cemented carbides with microstructural variations were investigated. Microstructure parameters such as Co binder content, WC particle size, binder mean free path,.....
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Korean J. Met. Mater.
2023;61(10):800-806. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.800
Abstract
Glass fiber-reinforced polymers (GFRPs) have attracted significant attention as structural materials because of their high fatigue resistance, corrosion resistance, strength, and stiffness. This study examined the effect of elevated temperatures (150, 250, 350, and 450oC) on the microstructural and mechanical properties of GFRP plates. The number of bubbles increased as.....
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Crossref 1
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6K 초극저온 인장 시험 : Fe-Mn-Cr 강의 미세조직 및 기계적 물성
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김영균, 임가람, 나영상
Korean J. Met. Mater.
2023;61(6):389-396. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.389
Abstract
Materials with superior cryogenic strength and good ductility are increasingly in demand for resident friendly liquid-hydrogen (20K) storage tanks. Additionally, the space industry also requires materials that retain excellent mechanical properties at extremely low temperatures. However, mechanical testing at such low temperatures is highly limited due to the difficulties in.....
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자동차용 초고강도 강재의 전기아연도금 시 음극전류 인가조건이 수소 유입, 취화 및 부식유기 수소취화 거동에 미치는 영향
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방혜린, 박진성, 김상헌, 김태엽, 오민석, 김성진
Korean J. Met. Mater.
2023;61(3):145-156. Published online 2023 Feb 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.3.145
Abstract
The effects of the electrogalvanizing conditions (a combination of plating current and time) on hydrogen infusion, embrittlement, and corrosion-induced hydrogen embrittlement (HE) behaviors of ultra-high strength steel were examined. A range of experimental and analytical methods, including electrochemical impedance spectroscopy, hydrogen permeation, polarization, and slow strain rate test, were employed......
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Web of Science 2
Crossref 1
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기계학습과 데이터 전처리 기법을 활용한 주물사 특성 예측에 관한 연구
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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.....
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다성분계 Al-Si-Cu-Ni 합금의 미세조직적 인자와 고온강도의 상관관계에 대한 연구
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조민수, 조영희, 이정무, 김수배, 김수현, 장재일
Korean J. Met. Mater.
2022;60(7):489-501. Published online 2022 Jun 3
DOI:
https://doi.org/10.3365/KJMM.2022.60.7.489
Abstract
The elevated temperature strength of multicomponent Al-Si alloys is greatly affected by the volume fraction and the interconnectivity of hard phases formed upon solidification. In the present investigation, such influences were examined for two Al-Si-Cu-Ni alloys with different total volume fractions of hard phases. To control the microstructural features related.....
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Web of Science 2
Crossref 2
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실리카 나노입자의 분산도가 주형의 항절강도에 미치는 영향
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김판성, 배민아, 백재호, 제정호, 이만식
Korean J. Met. Mater.
2022;60(6):478-487. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.478
Abstract
Sodium silicate solutions are used as an eco-friendly binder in the casting process. However, the strength of sand molds using the sodium silicate solutions is reduced because of their low humidity resistance. In this study, silica nanoparticles were added to a sodium silicate solution with a constant SiO
2
/Na
2
O ratio to.....
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Crossref 2
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Ni-Cr-Mo-V계 저합금강의 미세조직과 기계적 특성에 관한 연구
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조무근, 류성현, 김경일, 김동응, 김정인, 김경택, 김상섭, 조규섭
Korean J. Met. Mater.
2022;60(4):251-262. Published online 2022 Mar 28
DOI:
https://doi.org/10.3365/KJMM.2022.60.4.251
Abstract
Ni-Cr-Mo-V steel alloys for high-speed railway brake discs were prepared to investigate the effect of alloying element contents on the microstructure and mechanical properties. The Cr, Mo, Mn alloying elements were incorporated into the steel alloys, which contained low carbon content in the range 0.16 wt.% ~ 0.21 wt.% to.....
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Web of Science 5
Crossref 5
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소결 방법에 따른 WC-20wt%Co 초경합금의 인장 특성 및 피로 수명
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류성현, 조무근, 김경일, 노우람, 홍익제, 이광희, 김상섭, 조규섭
Korean J. Met. Mater.
2022;60(3):227-236. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.227
Abstract
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging die and cutting tools. WC-Co cemented carbide is manufactured by liquid phase sintering (LPS), and a new sintering process for densification has been developed. In this study, cylindrical rod shaped tensile and.....
More
Web of Science 2
Crossref 3
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초음파 미세 표면 냉간단조법(UNSM)을 적용한 AZ31 마그네슘 판재의 단면 미세조직 및 강도 향상 효과 분석
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강명성, 강주희, 박현욱, 김준형, 편영식, 백민재, 이동준, 이승진, 박상후, 김홍물, 박성혁, 최윤석
Korean J. Met. Mater.
2022;60(3):169-179. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.169
Abstract
An ultrasonic nanocrystal surface modification (UNSM) technique was applied to a 1-mm thick AZ31 magnesium sheet. UNSM is a relatively new surface modification technique in which a hard, hemispherical tip (2.38 mm in diameter) strikes the surface at an ultrasonic frequency to induce plastically deformed gradient microstructures and deep compressive.....
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Web of Science 1
Crossref 1
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자동차용 초고강도급 강재 내 미량 첨가된 합금원소 (C, Ni, Cr 및 Mo)가 중성 수용액 환경 내 장기 부식거동에 미치는 영향
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방혜린, 박진성, 성환구, 김성진
Korean J. Met. Mater.
2022;60(1):35-45. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.35
Abstract
This study examined the effects of minor alloying elements (C, Ni, Cr, and Mo) on the long-term corrosion behaviors of ultrahigh-strength automotive steel sheets with a tensile strength of more than 1800 MPa. A range of experimental and analytical results showed that the addition of Ni, Cr, and Mo decreased.....
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Web of Science 5
Crossref 3
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고비강도와 고연신을 가지는 다중변형기구 하이엔트로피 합금 개발
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윤국노, 오현석, 이제인, 박은수
Korean J. Met. Mater.
2021;59(12):857-869. Published online 2021 Nov 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.12.857
Abstract
In this study we developed a novel (TRIP+TWIP) high entropy alloy (HEA) with high specific strength and large ductility. First, by controlling the atomic constitution of the 3d transition metals (Cr, Mn, Fe, Co, and Ni), we designed a light-weight TRIP-assisted dual-phase HEA with a non-equiatomic composition of Cr
22
Mn
6
Fe
40
Co
26
Ni
6
, which.....
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Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2021;59(8):567-574. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.567
Abstract
The bonding properties of adhesives are mainly affected by surface roughness, topography and chemical adsorption. In this paper, we studied the effects of surface pretreatment of Al 2024-T3 (bare) in terms of surface roughness, topography and surface free energy. Surface pre-treatment included solvent cleaning, FPL etching, PAA and CAA treatment......
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Crossref 1
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미량의 H
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S 함유 수용액 환경 내 CO
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첨가가 고강도 철강소재의 부식 및 수소침투거동에 미치는 효과
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류승민, 박진성, 방혜린, 김성진
Korean J. Met. Mater.
2021;59(8):533-544. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.533
Abstract
The effects of adding CO
2
to low level H
2
S containing aqueous environment on the corrosion and hydrogen penetration behaviors of high-strength steel were evaluated using a range of experimental and analytical methods. The corrosion rate of the steel sample exposed to a low level of H
2
S dissolved in an aqueous.....
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Web of Science 3
Crossref 3
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T6 열처리에 의한 Al-Mg-Si 합금의 비등방성 석출물 형상을 고려한 확률 의존적 석출강화효과
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최승규, 김광훈, 김진평, 김세훈, 손승배, 이석재
Korean J. Met. Mater.
2021;59(8):515-523. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.515
Abstract
This study proposed a constitutive equation to predict the change in yield strength according to the behavior of β″ metastable precipitates, which have a profound effect on strength among materials precipitated during the T6 heat treatment of Al-Mg-Si alloy. The β″ precipitate is a metastable phase before it becomes a.....
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Web of Science 5
Crossref 5
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물유리계 바인더로 제조한 천연주물사와 인공주물사 중자의 강도 특성
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배민아, 김판성, 김경호, 이만식, 백재호
Korean J. Met. Mater.
2021;59(4):273-280. Published online 2021 Mar 24
DOI:
https://doi.org/10.3365/KJMM.2021.59.4.273
Abstract
Natural sand and organic binders are commonly used in casting processes, but these ingredients produce environmental problems with dust and harmful TVOC(Total Volatile Organic Carbon) gases. Research on the introduction of artificial sand and inorganic binders to solve these environmental problems is being actively conducted mainly in the casting industry......
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Web of Science 1
Crossref 2
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WC-12~22wt%Co 초경합금에서 미세조직 인자가 인장 성질에 미치는 영향
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류성현, 김경일, 노우람, 김상섭, 조규섭
Korean J. Met. Mater.
2021;59(3):201-208. Published online 2021 Feb 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.3.201
Abstract
Cemented carbide is a kind of composite material in which fine particles of carbide are embedded into the matrix of a binder metal. It has a long service life because of its superior mechanical properties. In this study, the overall tensile behavior of a cemented carbide, WC-Co, was investigated by.....
More
Web of Science 3
Crossref 3
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Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr 지르코늄 합금 압연 판재의 동적 변형시효 거동
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김일현, 이명호, 정양일, 김현길, 장재일
Korean J. Met. Mater.
2021;59(1):8-13. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.8
Abstract
The behavior of dynamic strain aging (DSA) in a Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr alloy strip was investigated at temperature ranges of 25–600 °C via a tensile test. The tensile test was performed at two different strain rates 8.33 × 10
-5
and 1.67 × 10
-2
s
-1
. The shear stress of the alloy strip revealed.....
More
Web of Science 2
Crossref 2
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Korean J. Met. Mater.
2020;58(12):843-851. Published online 2020 Dec 4
DOI:
https://doi.org/10.3365/KJMM.2020.58.12.843
Abstract
In this study, oxide (Y
2
O
3
)-embedded Ni particles were fabricated via a new process. The process involves the mechanical hydrogenation of Ni–Y alloy into Ni–YH
2
and the selective oxidation of Ni–YH
2
to Ni–Y
2
O
3
. The alloy powders were prepared for sintering by the mechanical alloying of a mixed powder. The powder was.....
More
Web of Science 1
Crossref 2
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컬러강판 불연성 및 가공성에 미치는 무기충진제 첨가량의 영향
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홍문희, 김인규, 윤혜정
Korean J. Met. Mater.
2020;58(11):768-775. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.768
Abstract
Recent large-scale fires in buildings and logistic warehouses have become a major social issue, involving both property loss and multiple casualties. To make color coated steel sheets non-combustible and/or have anti-fire properties, various ways of optimizing manufacturing parameters have been investigated for outer, inner, roof and ceiling panels. In the.....
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저온 분사 공정으로 제조된 초고강도 Cu 벌크 소재의 인장 및 압축 변형 거동
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김영균, 이기안
Korean J. Met. Mater.
2020;58(11):759-767. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.759
Abstract
In this study, high-strength pure Cu bulk material was manufactured using a cold spray additive manufacturing process, and its microstructure, tensile and compressive deformation behaviors were investigated and compared. The cold spray additive manufactured Cu bulk material showed a heterogeneous grain structure consisting of fine-grains and coarse-grains, and only α.....
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Web of Science 1
Crossref 1
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Al-Si 도금층 두께가 22MnB5강의 핫스탬핑 공정 마모에 미치는 영향
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지민기, 손현성, 오진근, 김성우, 김경목, 전태성
Korean J. Met. Mater.
2020;58(8):573-582. Published online 2020 Jul 27
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.573
Abstract
Al-Si coated ultra-high strength steels (UHSS) are widely used in automotive applications because of their high strength-to-weight ratio, corrosion protection and good weldability. The hot stamping (also called hot press forming) process is an effective and suitable technique for producing automotive parts from Al-Si coated UHSS. However, critical issues, such.....
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Web of Science 3
Crossref 3
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CBAPC 바인더로 제조한 인공사 중자의 강도 및 내습성에 미치는 P/Al 몰 비와 경화 조건의 영향
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오현곤, 박동국, 김양도, 이만식
Korean J. Met. Mater.
2019;57(12):808-816. Published online 2019 Nov 22
DOI:
https://doi.org/10.3365/KJMM.2019.57.12.808
Abstract
CBAPC (chemically bonded aluminum phosphate ceramic) binders have various advantages, including superior corrosion resistance and strength at high temperature. They are also a non-toxic and eco-friendly material. We investigated an inorganic binder based on CBAPC using artificial sand for casting. The CBAPC binders were synthesized with various P/Al molar ratios.....
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Crossref 1
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초고강도강 저항 점용접 연속타점시 전극의 국부적 합금화 현상이 용접품질 저하에 미치는 영향 연구
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김재원, Siva Prasad Murugan, 강남현, 박영도
Korean J. Met. Mater.
2019;57(11):715-725. Published online 2019 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.715
Abstract
Evaluation of electrode degradation in resistance spot welding of 1180TRIP steel was carried out through an electrode life test, and weldability testing was performed by the measurement of the nugget size, the peak load analysis and the measurement of the electrode tip size at 30 intervals. Analysis of the change.....
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Web of Science 7
Crossref 6
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초고강도 베이나이트강의 미세조직과 기계적 성질에 미치는 탄소함량과 항온열처리 온도의 영향
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황보승, 이홍범, 송영범, 함진희, 김홍규, 서동우
Korean J. Met. Mater.
2019;57(6):335-342. Published online 2019 May 16
DOI:
https://doi.org/10.3365/KJMM.2019.57.6.335
Abstract
The effect of carbon content and isothermal heat treatment conditions on the microstructure evolution and mechanical properties of ultra-high strength bainitic steels was investigated. A reduction in carbon content from 0.8 wt% to 0.6 wt% in super-bainite steel with typical chemistry effectively improved not only the Charpy impact toughness but.....
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Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2019;57(4):227-235. Published online 2019 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.4.227
Abstract
The additive manufacturing (AM) process is a production technology process that has recently attracted attention. Among AM processes, the binder jetting (BJ) method is advantageous because it allows both wide material selection and design freedom. However, the output arrangement, which determines the direction in which the binder is injected during.....
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Web of Science 16
Crossref 19
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항공용 7xxx계 알루미늄 합금의 고온 노출 온도가 인장 및 샤르피 충격 특성에 미치는 영향
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안우진, 김도희, 김봉환, 김세광, 김상식, 성효경
Korean J. Met. Mater.
2019;57(4):214-226. Published online 2019 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.4.214
Abstract
Aluminum alloys have been widely used for aerospace applications due to their high strength and lightweight. New demand is growing for aluminum alloys with high temperature mechanical properties that can sustain plastic deformation at high temperature. In this study, correlations among microstructure, tensile properties and Charpy impact properties were analyzed.....
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Web of Science 4
Crossref 4
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Korean J. Met. Mater.
2018;56(9):664-673. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.664
Abstract
This study examined the influence of nanosized aluminum nitride (AlN) powders (0, 0.01, 0.05, 0.10, 0.30, and 0.50 wt%), on an Al4047-based filler metal. Nanosized AlN powders were dispersed uniformly into the filler metal by a mechanical mixing and melting route using a stainless steel propeller. The influences of nanosized.....
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