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Korean J. Met. Mater.
2019;57(11):708-714. Published online 2019 Oct 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.708
Abstract
Resistance Element Welding (REW) is a novel processing technology developed to join dissimilar materials such as aluminum and steel. It uses an auxiliary steel rivet (element) inserted into an aluminum sheet that forms a resistance spot weld with the steel sheet, and the aluminum work piece is mechanically joined by.....
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Web of Science 7
Crossref 9
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열처리 및 열 사이클 조건에 따른 전해 Cr/전해 Ni-P 도금의 접합강도 평가 및 계면분석
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이진아, 손기락, 최명희, 이규환, 박영배
Korean J. Met. Mater.
2018;56(4):280-288. Published online 2018 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.4.280
Abstract
The effects of heat treatment and thermal cycle conditions on the bonding strength and interfacial characteristics of electroplated Cr/electroplated Ni-P coatings were systematically evaluated. With step1 samples, heat treatment was performed at 750
o
C for 6 hours after successive electroplating of Ni-P and Cr layers. With step2 samples, 1st heat.....
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중탄소강 SAW 용접금속의 응고 균열 발생에 미치는 용접재료의 영향
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방국수, 송우현, 정홍철
Korean J. Met. Mater.
2018;56(2):137-145. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.137
Abstract
The effects of submerged-arc welding consumables, wire and flux, on solidification cracking in the weld metal of medium-carbon steel were investigated. It showed that weld metal with a greater amount of C, S, and P had a wider brittleness temperature range, BTR, which resulted in longer total and maximum crack.....
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전기화학적 순환부식 시험법을 활용한 자동차 로어암의 단품단위 부식평가에 관한 연구
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김선홍, 이지훈, 김정구, 장민
Korean J. Met. Mater.
2018;56(2):103-112. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.103
Abstract
This research focused on the development of the part unit evaluation for an organic coated automotive lower arm using the electrochemical cyclic corrosion test (E-CCT). The E-CCT accelerates both the coating degradation and the perforation corrosion. The applied potential for the coating degradation was determined to be -500 mV
SCE
for.....
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연속냉각 중 산소함량이 Ti-5Al-2.5Fe 합금의 상변태 거동에 미치는 영향
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김도헌, 원종우, 정대원, 이학성, 윤석영, 현용택
Korean J. Met. Mater.
2017;55(9):600-608. Published online 2017 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2017.55.9.600
Abstract
The effects of oxygen content on the
β
to
α
phase transformation of the Ti-5Al-2.5Fe alloy during continuous cooling were investigated by varying the oxygen content between 0.08 – 0.41 wt%. Dilatometer tests were performed at cooling rates of 0.05 – 100 ℃/s combined with microstructure observation to examine phase.....
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Fe-Mn-Al-Si-Sb-C 강의 고온산화에 미치는 Mn, Si, Sb 첨가효과
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박순용, 이동복
Korean J. Met. Mater.
2017;55(5):308-314. Published online 2017 May 9
DOI:
https://doi.org/10.3365/KJMM.2017.55.5.308
Abstract
High Mn twinning-induced plasticity (TWIP) steels with compositions of Fe-(18.0-18.17) Mn-1.51Al-(0.48-0.52)Si-(0.61-0.62)C-(0.52-0.54)Cr-(0.22-0.23)Ni-0.03Nb-(0-0.04)Sb (wt%) are oxidized at 650 ℃ and 750 ℃ for < 24 h in air in order to determine the effect of the alloying elements on the oxidation. They are oxidized parabolically to MnO
2
,Mn
2
O
3
,FeO,Fe
2
O
3
, and FeMn
2
O
4
oxides with relatively.....
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Crossref 1
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Korean J. Met. Mater.
2017;55(3):150-155. Published online 2017 Mar 3
DOI:
https://doi.org/10.3365/KJMM.2017.55.3.150
Abstract
In this study, the effect of α and β those stabilizers on the microstructure and phase transformation of cast Ti-6wt%Al-4wt%V alloy at various solution treatment temperatures was investigated. The dependence of the transformation behavior of the β phase during the solution treatment and its dependence was determined by the partitioning.....
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Crossref 3
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소형 인장시편을 이용한 TIG 용접된 이종금속 접합부의 변형 및 파괴거동 분석
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신지환, Nabeel Jahanzeb, 김민성, 황지현, 최시훈
Korean J. Met. Mater.
2017;55(2):125-131. Published online 2017 Feb 2
DOI:
https://doi.org/10.3365/KJMM.2017.55.2.125
Abstract
The deformation and failure behaviors of dissimilar metal joints between SS400 steel and STS316L steel were investigated. The dissimilar metal joints were fabricated using the tungsten inert gas (TIG) welding process with STS309 steel as a filler metal. The microstructures of the dissimilar metal joints were investigated using an optical.....
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Crossref 3
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확산접합된 Ni기 합금 Hastelloy X에 미치는 후열처리 영향
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사인진, 황종배, 홍순익, 김응선, 김민환
Korean J. Met. Mater.
2017;55(2):115-124. Published online 2017 Feb 2
DOI:
https://doi.org/10.3365/KJMM.2017.55.2.115
Abstract
The effect of post-bond heat treatment (PBHT) on diffusion-bonded polycrystalline Ni-base alloy Hastelloy X (Ni-22Cr-18Fe-8Mo) was evaluated in this study. Diffusion bonding was conducted under a compressive pressure of 14 MPa in the temperature range of 1100-1200 ℃. While (Cr,Mo)-rich and (Mo,Si)-rich precipitates were developed along the interface at 1100.....
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Crossref 3
Plastic Working & Materials Processing
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레이저 침탄공정시 철과 흑연의 혼합 슬러리가 침탄특성에 미치는 효과
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지원종, 이성훈, 문영훈
Korean J. Met. Mater.
2017;55(1):16-23. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.16
Abstract
Laser surface carburizing can be achieved by a laser alloying mechanism, which includes melting the graphite coated substrate and dissolution of the graphite in the liquid state. The drawback of laser carburizing is that process-induced cracks frequently form on the carburized surface as a result of carbon enrichment and the.....
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Crossref 4
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내진용 고강도 철근의 제조와 기술 개발 동향
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황병철, 심재혁, 이명규, 이준호, 정준호, 김보성, 원성빈
Korean J. Met. Mater.
2016;54(12):862-874. Published online 2016 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.12.862
Abstract
Since reconstruction of old town in Korea requires high-rise and seismic design construction, many attentions have been paid to high strength seismic reinforced steel bar. In the present paper, technical developments and trends are summarized for developing next-generation seismic reinforced steel bar of grade 700 MPa. Steelmaking process requires high.....
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Crossref 9
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FCCI 방지를 위한 내면 Cr 도금 피복관의 물성 평가
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김준환, 이병운, 천진식, 김성호
Korean J. Met. Mater.
2016;54(11):855-861. Published online 2016 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.11.855
Abstract
Studies were carried out to apply electroplating technique to the inner surface of a nuclear fuel cladding tube to prevent a fuel-cladding chemical interaction (FCCI) in a sodium-cooled fast reactor (SFR). 20 μm thick Cr was uniformly plated onto the inner surface of a HT9 cladding tube with a 7.4...
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Crossref 1
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열연 590FB강의 일축인장 시 미소역학적 변형거동 및 파괴거동에 미치는 베이나이트의 강도계수의 영향
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김은영, 김성일, 최시훈
Korean J. Met. Mater.
2016;54(11):808-816. Published online 2016 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.11.808
Abstract
The effect of the strength coefficient (
K
B
) of bainite on micromechanical deformation and failure behaviors of a hot-rolled 590MPa steel (590FB) during uniaxial tension was simulated using the elasto-plastic finite element method (FEM). The spatial distribution of the constituent phases was obtained using a phase identification technique based on optical.....
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Crossref 6
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Korean J. Met. Mater.
2016;54(10):732-742. Published online 2016 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.10.732
Abstract
In this work, both experimental and numerical studies were conducted to investigate the densification behavior of stainless steel 316L (STS 316L) powders during hot isostatic pressing (HIP), and to characterize the mechanical properties of HIPed specimens. The HIP experiments were conducted with gas atomized STS 316L powders with spherical particle.....
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Crossref 5
Materials Analysis & Characterization
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금속 미세조직의 3차원 이미지 관찰을 위한 순차적 박리 및 재구성 기술
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김수현, 임영목
Korean J. Met. Mater.
2016;54(9):698-710. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.698
Abstract
Experimental techniques for serial sectioning and reconstruction were investigated in the three-dimensional imaging of microstructures in metallic materials. Mechanical polishing equipped with a light optical microscope and a digital image processor was used for the serial sectioning and reconstruction. Different processing conditions were investigated for three different alloys: Al-Si alloy,.....
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Crossref 4
Casting/Solidification/Heat Treatment
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저합금강의 인코넬 625 육성용접 후 열처리에 따른 미세조직 및 기계적 특성
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김승필, 장재호, 김정수, 김병준, 손근용, 남대근
Korean J. Met. Mater.
2016;54(8):585-591. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.585
Abstract
Overlay welding technique is one of methods used to improve metal mechanical properties such as strength, toughness and corrosion resistance. Generally, Inconel 625 alloy is used for overlay welding layer on low carbon steels for economic consideration. However, the method produces some problems in the microstructure of the cast structure...
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Crossref 2
Powder Metallurgy
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/W/Mo-Graphite 코팅층의 2100 ℃ 열처리 후 미세조직 변화에 관한 연구
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안규백, 최경환, 김상섭, 조규섭
Korean J. Met. Mater.
2016;54(8):559-565. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.559
Abstract
A tungsten coating was deposited onto a graphite substrate using the atmospheric plasma spraying (APS) technique. In order to increase the adhesion strength between the metallic tungsten(W) and graphite, a molybdenum (Mo) interlayer was pre-deposited onto the graphite surface by utilizing the APS technique. Also, after deposition of a APS-W.....
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Crossref 4
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