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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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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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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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Web of Science 3
Crossref 3
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X-선 회절을 통한 적층제조 A356.2 알루미늄 합금의 잔류응력 분석
[corrected-article]
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박상철, 김인영, 김영일, 김대겸, 오승주, 이기안, 이빈
Korean J. Met. Mater.
2023;61(7):534-544. Published online 2023 Jun 21
DOI:
https://doi.org/10.3365/KJMM.2023.61.7.534
Abstract
The physical properties of metal-based structural materials, such as hardness, strength and toughness, are directly or indirectly affected by residual stress inside or on the surface of the given part. Repeated rapid heating and cooling during the additive manufacturing process causes thermal gradients and expansion and contraction in the material,.....
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Web of Science 2
Crossref 2
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Korean J. Met. Mater.
2021;59(8):524-532. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.524
Abstract
The microstructure, mechanical properties and residual stress of flux-cored arc welded ASTM A516-70N carbon steel using a Mn-based low-temperature transformation (LTT) welding consumable were investigated. Microstructural analysis with X-ray diffraction, an electron backscattered diffractometer and a field-emission scanning electron microscope showed that the LTT weld metal was made up of.....
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Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2020;58(8):560-565. Published online 2020 Jul 27
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.560
Abstract
This study investigated the influence of laser shock peening without coating (LSPw/oC) on the degradation of copper electrical contacts. A theoretical calculation of the plastic-affected depth (PAD) induced by LSPw/oC was performed, based on the laser-induced plasma pressure along with the Hugoniot elastic limit of our LSPw/oC experimental conditions. The.....
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Web of Science 4
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Korean J. Met. Mater.
2020;58(8):515-521. Published online 2020 Jul 27
DOI:
https://doi.org/10.3365/KJMM.2020.58.8.515
Abstract
A method for evaluating residual stress using an instrumented indentation test was developed some decades ago. More recently, another method was developed, using a Knoop indenter. The conversion factor ratio, which is one of the key factors in the evaluation algorithm, has been taken to be 0.34, although this value.....
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Web of Science 3
Crossref 3
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박막 잔류응력 및 제조공정에 따른 금속박막층 미세크랙 영향
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조병규, 홍승찬, 김병삼, 천재경
Korean J. Met. Mater.
2020;58(3):175-181. Published online 2020 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.3.175
Abstract
In recent automobile trends, the functions of opening and closing the vehicle door are accomplished by touch sensor and smart-phone NFC (Near Field Communication) systems. These convenience features are incorporated into the outdoor handle. However, this function can’t be used when chrome plating is applied to this part for design.....
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Web of Science 1
Crossref 1
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오스테나이트 스테인리스강 튜브의 응력부식균열 민감도에 영향을 미치는 미세조직 및 잔류응력 비교
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이호중, 오승진, 김홍덕
Korean J. Met. Mater.
2019;57(1):51-59. Published online 2018 Dec 14
DOI:
https://doi.org/10.3365/KJMM.2019.57.1.51
Abstract
Three 304L austenitic stainless steel feedwater heater (FWH) tubes used in pressurized water reactors (PWRs) were investigated in this study. By comparing metallurgical differences, such as microstructural features, micro-hardness, and circumferential residual stress of the failed and non-failed FWH tubes by stress corrosion cracking (SCC), factors which could affect SCC.....
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Web of Science 5
Crossref 5
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Korean J. Met. Mater.
2018;56(9):680-685. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.680
Abstract
This study elucidates the effects of annealing on the properties of Fe-Si-Al flakes. The changes of the DO
3
phase, the lattice parameter and the grain size of the flakes were analyzed by X-ray peak broadening and shift. Static magnetic properties, namely, coericivity and saturation magnetization, were analyzed by a vibration.....
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Crossref 6
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해양플랜트용 YP 690 MPa급강 다층 용접부의 재열 균열 특성 평가
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신용택, 조영주
Korean J. Met. Mater.
2018;56(8):580-588. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.580
Abstract
This study evaluated the relationship between reheat cracking that occurs in the reheated weld zone formed by subsequent multi-pass welding and the preheat/interpass temperature. The multi-pass weldment was YP 690 MPa high-strength steel, which is used in mobile offshore platform units. The welding process was flux-cored arc welding (FCAW), which.....
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Korean J. Met. Mater.
2017;55(8):544-549. Published online 2017 Aug 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.8.544
Abstract
The delayed cracking behavior of deep-drawn lean duplex stainless steel (LDSS) was investigated, and compared with that of conventional metastable austenitic stainless steels (MASS). Hydrogen charging was performed by electrochemical method, and the hydrogen-charged specimens were subjected to the slow-strain-rate test. Fractures occurred along the phase boundaries in the LDSS,.....
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