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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
5
intermetallic compound (IMC) was formed at the upper Cu/SAC305 interface, while Ag
3
Al IMC was formed at the lower SAC305/Al interface, and a black layer of.....
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항복강도 70 ksi급 전기저항용접 강관의 입열량 및 심 어닐링 온도에 따른 미세조직과 저온충격인성 상관관계 고찰
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김태훈, 김치원, 이찬희, 곽진섭, 전동현, 홍현욱
Korean J. Met. Mater.
2023;61(9):659-668. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.659
Abstract
In this study, the influence of heat input and post-seam annealing (PSA) temperature on the microstructure and impact toughness of electric resistance welded (ERWed) API X70 steel pipe was investigated. The ERW seam welds of pipes were fabricated with low, moderate, and high heat inputs, and followed by the PSA.....
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고용 강화 금속 바인더(Co
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권한중
Korean J. Met. Mater.
2022;60(1):14-25. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.14
Abstract
The metallic binder in WC-Co hard metals was effectively strengthened using the solid solution phases of Co and W. These metallic phases of Co and W (Co
1-x
W
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, x<1), which consist of two kinds of structures (FCC and HCP), were successfully formed by hydrogen reduction of milled oxides mixtures (Co
3
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and.....
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Web of Science 1
Crossref 2
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엄해원, 원주연, 신상용
Korean J. Met. Mater.
2021;59(11):781-795. Published online 2021 Oct 28
DOI:
https://doi.org/10.3365/KJMM.2021.59.11.781
Abstract
The effects of cooling rate on the microstructure and cryogenic impact toughness of coarse-grained heat-affected zone (CGHAZ) and inter-critically reheated coarse-grained HAZ (IC CGHAZ) in 9% Ni steel were investigated. CGHAZ and IC CGHAZ specimens were prepared from 9% Ni steel by controlling the cooling rate of the simulated welding.....
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고강도 API 라인파이프강의 저온 인성에 미치는 베이나이트계 미세조직의 영향
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이승완, 이상인, 황병철
Korean J. Met. Mater.
2020;58(5):293-303. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.293
Abstract
In this study the correlation between bainitic microstructure and the low-temperature toughness of high-strength API pipeline steels was discussed in terms of crack initiation and propagation in the microstructure. Three types of API pipeline steels with different bainitic microstructures were fabricated using varying alloying elements and thermo-mechanical processing conditions, and.....
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Web of Science 8
Crossref 7
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펄스 전류 활성 소결에 의한 4YSZ-BN 복합재료 제조와 기계적 성질
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조우진, 김성은, 오세훈, 손인진
Korean J. Met. Mater.
2019;57(12):764-770. Published online 2019 Nov 22
DOI:
https://doi.org/10.3365/KJMM.2019.57.12.764
Abstract
4YSZ is generally used in fuel cells, oxygen sensors, hip and knee joint replacements and thermal barriers because of it excellent properties, including low density, high biocompatibility, good resistance against corrosion, hard phase and high melting point, and high ionic conductivity. However, 4YSZ with large grain has low resistance to.....
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Web of Science 1
Crossref 1
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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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소결온도 변화에 따른 Binderless-WC 소결체 특성평가
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박현국, 이정한, 장준호, 오익현
Korean J. Met. Mater.
2019;57(5):304-309. Published online 2019 Apr 10
DOI:
https://doi.org/10.3365/KJMM.2019.57.5.304
Abstract
In this study, Binderless-WC hard materials were fabricated using the pulsed current activated sintering (PCAS) process for a Friction Stir Welding tool and difficult-to-cut tool application. Tungsten carbide (WC) hard materials are used in various industries and possess a superior hardness compared to other hard materials. They have particularly high.....
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Web of Science 6
Crossref 6
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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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고강도 탄소강 FCA 용착금속의 고온균열 저항성과 저온 충격인성에 미치는 보론과 망간의 영향
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박수길, 조영호, 지춘호, 이정훈, 서성문, 강남현
Korean J. Met. Mater.
2019;57(1):28-37. Published online 2018 Dec 14
DOI:
https://doi.org/10.3365/KJMM.2019.57.1.28
Abstract
The hot crack resistance and mechanical properties of flux cored arc (FCA) welds were investigated with three kinds of welding consumables having different boron (B) and manganese (Mn) contents for high strength carbon steel. The hot crack resistance, measured from self-restraint testing, strongly depended on the amount of B in.....
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Web of Science 3
Crossref 3
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항복강도 390 MPa급 가공열처리강 대입열용접 열영향부 충격인성 및 연화현상
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방국수, 안영호, 정홍철
Korean J. Met. Mater.
2018;56(11):796-804. Published online 2018 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.11.796
Abstract
The Charpy impact toughness of the heat affected zone (HAZ) of electro gas welded 390 MPa yield strength grade steel, manufactured by a thermo mechanically controlled process, was investigated. The effects of added Nb on the toughness of the steel and the factors influencing scatter in toughness are discussed in.....
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Korean J. Met. Mater.
2018;56(9):658-663. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.658
Abstract
Titanium nitride (TiN) has been used extensively in coating materials and cutting tools because of its attractive properties, which include low density, high melting point, high hardness and thermodynamic stability. However, like many ceramic materials, its low fracture toughness limits wide industrial application. The methods generally utilized to improve its.....
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Crossref 16
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선박 및 해양구조물용 항복강도 460 MPa급 강재의 FCA 다층 용접금속부 특성에 미치는 규소의 영향
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김종식, 이명수, 정종민, 최한글, 정상훈, 강창룡
Korean J. Met. Mater.
2018;56(7):499-504. Published online 2018 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.7.499
Abstract
This study investigated the effect of Si on the characteristics of FCA multi-layer weld metal with 460 MPa yield strength grade steels for ships and marine structures. The effect on microstructure was evaluated by tensile, charpy impact and CTOD testing of 4 FCAW welds containing various C and Si contents......
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Crossref 1
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Cr강의 미세조직과 파괴인성에 미치는 열간단조 및 열처리 공정의 영향
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이동준, 권용남, 김민석, 구가은, 허상현, 김남용, 이진모
Korean J. Met. Mater.
2018;56(3):221-226. Published online 2018 Mar 6
DOI:
https://doi.org/10.3365/KJMM.2018.56.3.221
Abstract
In this study, the effects of hot forging and heat treatment (quenching and tempering) of cast Cr alloy steel on the microstructures and mechanical properties were investigated. The hot forging was performed at a compressive ratio 0.5 at 1,250
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C. The heat treatment process was quenching (860
o
C for 2.....
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SA508 Gr.3 상용 원자로용기강의 두께방향 미세조직 변화가 인장 및 충격특성에 미치는 영향
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홍석민, 이초롱, 김민철, 이봉상
Korean J. Met. Mater.
2017;55(11):752-759. Published online 2017 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2017.55.11.752
Abstract
In this study, the effects of microstructural variations in heavy-section reactor pressure vessel (RPV) steels on tensile and Charpy impact properties were investigated. Two PRV blocks, OPR1000 and APR1400 (ORV, ARV) were taken from the archive materials used in Korea standard nuclear power plants. Test specimens were sampled from five.....
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Crossref 5
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역사이클 하중의 증분변위가 원전배관 재질의 파괴저항곡선에 미치는 영향
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김상영
Korean J. Met. Mater.
2017;55(2):85-90. Published online 2017 Feb 2
DOI:
https://doi.org/10.3365/KJMM.2017.55.2.85
Abstract
Reverse cyclic loading introduces alternatinf tensile and compressive loads to a structure. Several researchers have reported that a reverse cyclic load decreases the fracture resistance curve of carbon steel. In this paper, the fracture toughness of SA312 TP304 stainless steel, which is a nuclear piping material, was investigated under a.....
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Crossref 1
Mechanical Behavior
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다중회귀분석을 이용한 페라이트-펄라이트 조직 아공석강의 충격인성에 미치는 미세조직적 인자의 민감도 해석
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이승용, 이상인, 황병철
Korean J. Met. Mater.
2016;54(9):637-644. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.637
Abstract
In this study, the effect of microstructural factors on the impact toughness of hypoeutectoid steels with ferrite-pearlite structure was quantitatively investigated using multiple regression analysis. Microstructural analysis results showed that the pearlite fraction increased with increasing austenitizing temperature and decreasing transformation temperature which substantially decreased the pearlite interlamellar spacing and.....
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Crossref 7
Powder Metallurgy
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펄스전류 활성 소결에 의한 나노구조 TiC-TiAl 제조 및 기계적 성질
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곽봉원, 김병수, 윤진국, 홍경태, 손인진
Korean J. Met. Mater.
2016;54(8):566-572. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.566
Abstract
TiC-Co or TiC-Ni hard materials have been used for cutting tools. However, the high cost and the low hardness of Ni or Co, and the low corrosion resistance of the TiC-Ni and TiC-Co cermets have generated interest in recent years in using them as alternative binder phases. In this study,.....
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Crossref 4
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