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GTAW로 용접한 초내식성 오스테나이트계 스테인리스강 (UNS S31254) 열영향부의 내식성에 미치는 Ni계 용가재의 영향
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박진성, 조동민, 홍승갑, 윤태호, 김성진
Korean J. Met. Mater.
2023;61(6):404-413. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.404
Abstract
The effect of Ni-based fillers on corrosion resistance of welded super austenitic stainless steel (SASS) was examined. The use of Ni-based fillers for gas tungsten arc welded SASS leads to the formation of fine Cr-Mo enriched phase in its weld unmixed zone, which makes it more susceptible to the localized.....
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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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부여 송국리 유적 출토 고려시대 청동유물의 합금성분 및 제작기법에 따른 부식 특성
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장준혁, 정광용
Korean J. Met. Mater.
2022;60(5):400-408. Published online 2022 Apr 22
DOI:
https://doi.org/10.3365/KJMM.2022.60.5.400
Abstract
A comprehensive analysis of the corrosion characteristics of excavated bronze artifacts was conducted according to their alloy ratio and microstructure. Corroded by various factors, which resulted in different corrosion characteristics. Among these, corrosion may occur in the excavated bronze due to the difference in the alloy ratio, which is an.....
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Cited By 2
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암모니아를 이용한 그래핀 구조 제어 및 고감도 압력 센서로의 적용
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정연욱, 조승근, 문해인, 김영원, 신유진, 박길령, 이정우
Korean J. Met. Mater.
2022;60(3):206-212. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.206
Abstract
Graphene has been used in various fields because of its excellent mechanical, optical, electrical, and thermal properties. However, its intrinsic low sensitivity to pressure limits its sensor applications. To overcome this drawback, many researchers have tried to improve the sensitivity by controlling the defects on the graphene, but have yet.....
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Cited By 1
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슈퍼듀플렉스 스테인리스강의 반복 수정용접이 기계적 물성과 공식저항성에 미치는 영향
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김유성, 남성길, 최명환, 강남현
Korean J. Met. Mater.
2022;60(2):114-123. Published online 2022 Jan 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.2.114
Abstract
The study investigated the effect of repeated repair welding on the mechanical properties and pitting corrosion resistance of 25% Cr super duplex stainless steels (UNS S32750). The test coupons were prepared by gas tungsten arc welding (GTAW) with ER2594 filler metal and repaired 3-times at the same weld locations, where.....
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Korean J. Met. Mater.
2022;60(1):46-52. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.46
Abstract
This study evaluated changes in delta-ferrite content depending on the preheating of AISI 316L stainless steel. We also determined the reasons for the variation in delta-ferrite content, which affects corrosion resistance. Changes in delta-ferrite content after preheating was confirmed using a Feritscope, and the microstructure was analyzed using optical microscopy.....
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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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Cited By 2
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Korean J. Met. Mater.
2022;60(1):26-34. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.26
Abstract
This study was conducted to evaluate the corrosion resistance and optimize the heat-treatment process of AISI 439 ferrite stainless steel silicon and tin alloys with reduced chromium. The microstructure of the specimens and deposition under each condition were analyzed. The production of oxide films was compared based on the thickness.....
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Korean J. Met. Mater.
2021;59(11):821-828. Published online 2021 Oct 28
DOI:
https://doi.org/10.3365/KJMM.2021.59.11.821
Abstract
A three-dimensionally interconnected graphene-reinforced Cu (3Di Gr-Cu) composite was synthesized using a simple two-step process technique which involves the mechanical compaction of micronsized Cu particles followed by chemical vapor deposition (CVD) at 995 ℃. The microstructural properties of pure Cu and the 3Di Gr-Cu composite were investigated by optical.....
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Cited By 2
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고내식 합금도금 PosMAC
®
강판의 개발과 응용 특성
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손일령, 김태철, 주광일, 김명수, 김종상
Korean J. Met. Mater.
2021;59(9):613-623. Published online 2021 Aug 4
DOI:
https://doi.org/10.3365/KJMM.2021.59.9.613
Abstract
PosMAC
®
is a hot dipping Zn-Mg-Al coated steel sheet developed by POSCO. PosMAC
®
3.0 shows excellent anti-corrosion performance and is suitable for construction and solar energy systems in severe corrosive environments. PosMAC
®
1.5 has a superior surface quality and is preferred for automotive and home appliances. The advanced anti-corrosion properties of PosMAC
®
.....
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Cited By 1
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Al-Mg-Si 합금에서 열처리가 열확산도와 부식특성에 미치는 영향
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김유미, 최세원, 김영찬, 강창석
Korean J. Met. Mater.
2021;59(8):582-588. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.582
Abstract
The effect of the heat treatment on the Mg
2
Si phase in Al-Mg-Si alloy was investigated by a laser flash apparatus (LFA), Differential scanning calorimetry (DSC) and corrosion test. The alloy samples were solution treated at 590
o
C for a half hour followed by warm water quenching, and then aged in.....
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미량의 H
2
S 함유 수용액 환경 내 CO
2
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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슈퍼 오스테나이트계 스테인리스강 (UNS S31254)의 용접 및 용접 후 열처리 상태에서의 부식거동
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조동민, 박진성, 정원기, 홍승갑, 김성진
Korean J. Met. Mater.
2021;59(6):374-383. Published online 2021 May 26
DOI:
https://doi.org/10.3365/KJMM.2021.59.6.374
Abstract
The corrosion behaviors of a combined weld (plasma, gas tungsten arc) joint in a super austenitic stainless steel pipe were investigated using a range of experimental and analytical methods. To ensure superior corrosion resistance, a Ni-based super alloy (Inconel 625) was employed as the welding material only in the gas.....
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Cited By 2
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내식성 향상을 위한 기능성 초발수 스테인리스 스틸 (SUS 304) 표면 연구
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박영주, 정찬영
Korean J. Met. Mater.
2021;59(4):217-222. Published online 2021 Mar 24
DOI:
https://doi.org/10.3365/KJMM.2021.59.4.217
Abstract
Stainless steel is a metal with excellent workability, economy, and corrosion resistance, so it is used in various industrial applications including the marine, machinery, electronic parts, piping, power generation, and nuclear power fields. However, in contaminated environments such as marine and gas pipelines, stainless steel has problems, including surface aging.....
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Cited By 2
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반응성 스퍼터링법으로 제조된 Al
2
O
3
막을 이용한 ZnO/Cu/ZnO 투명 히터의 내식성과 투과도 개선 연구
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방금혁, 최두호
Korean J. Met. Mater.
2021;59(3):155-161. Published online 2021 Feb 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.3.155
Abstract
In this study, we report a methodology that simultaneously improved the corrosion resistance and visible transparency of ZnO/Cu/ZnO transparent heaters with the addition of reactively sputtered Al
2
O
3
layers. To assess corrosion resistance, ZnO and Al
2
O
3
layers with thicknesses in the range of 0-20 nm were deposited onto 20 nm-thick Cu.....
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Cited By 2
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지역난방 노후 축열조의 부식 건전성 평가 및 고찰
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윤대호, 채호병, 김희산, 김정구, 김우철, 하태백, 장재혁, 정준철, 이수열
Korean J. Met. Mater.
2020;58(10):693-702. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.693
Abstract
The thermal storage tank in a district heating system is a component that stores excess heat during normal operation and releases the stored heat to increase the efficiency of the system, when the heat source is stopped or additional demands occur. Recently, an obsolete thermal storage tank was dismantled for.....
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수소가압 및 응력부식 분위기에서 스테인레스강 SS304의 수소취성균열
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최병학, 이상우, 안종기, 이진희, 임태운
Korean J. Met. Mater.
2020;58(10):653-659. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.653
Abstract
The phenomena of hydrogen induced cracking (HIC) in 304 stainless steels was considered in a hydrogen pressure and stress corrosive atmosphere. Microstructures with chloride pits and stress corrosion cracks around the HIC were analyzed by SEM/EDS. Abnormal phase transformations induced by the hydrogen were analyzed using TEM and diffraction. In.....
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Cited By 4
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A
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염수환경 내 Zn-Al-Mg 합금도금강재의 공정조직 부식거동
J
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J
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K
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이재원, 오세영, 박보라, 오민석, 김성진
Korean J. Met. Mater.
2020;58(9):610-616. Published online 2020 Aug 19
DOI:
https://doi.org/10.3365/KJMM.2020.58.9.610
Abstract
To clearly understand the effect of the eutectic structure in the Zn-Al-Mg alloy coating on the corrosion behaviors in chloride containing aqueous environments, a bulk Zn-MgZn
2
sample was fabricated by diffusion bonding process, and a variety of experiments, such as electrochemical polarization and galvanic corrosion measurements, salt spray tests, and.....
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Cited By 5
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A516-65급 압력용기용 강재의 용접모사 열처리를 통한 용접열영향부의 수소확산 및 황화물응력균열 거동 연구
D
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M
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C
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-
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P
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,
J
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J
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K
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조동민, 박진성, 이진우, 김성진
Korean J. Met. Mater.
2020;58(9):599-609. Published online 2020 Aug 13
DOI:
https://doi.org/10.3365/KJMM.2020.58.9.599
Abstract
Hydrogen diffusion and sulfide stress cracking of simulated heat-affected zone (HAZ) of A516- 65 grade steel were examined using an electrochemical permeation technique, glycerin volumetric method, and constant loading method. HAZ samples were fabricated using a metal thermal cycle simulator with a welding heat input of 20, 35, and 50.....
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Cited By 4
A
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S
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P
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스테인리스강 SS304의 균열 형상과 에치 피트를 이용한 응력부식균열 전파 기구 해석
B
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H
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W
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L
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최병학, 이상우, 안종기, 이진희
Korean J. Met. Mater.
2020;58(9):583-589. Published online 2020 Aug 19
DOI:
https://doi.org/10.3365/KJMM.2020.58.9.583
Abstract
Austenitic stainless steel SS304 is vulnerable to Cl atmosphere SCC (stress corrosion crack). In this study, SCC phenomena related to stress and corrosion composition were analyzed to identify the mechanism for SCC initiation and propagation in SS304. The microstructure and mechanical properties resulting from crack propagation were analyzed by OM,.....
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Cited By 2
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K
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전북 완주 신풍유적 출토 초기철기시대 동검의 부식 및 제작특성
M
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K
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J
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,
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C
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C
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장민경, 조남철
Korean J. Met. Mater.
2020;58(7):472-479. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.472
Abstract
The subject of this study was a bronze sword excavated from the early Iron Age area of Sinpung site in Wanju. SEM-EDS, FE-EPMA and Raman Micro-Spectroscopy analysis methods were applied to investigate the manufacturing techniques and corrosion characteristics. The results of the analysis indicated a casting structure composed of both.....
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Cited By 3
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T
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AZ31 마그네슘 합금의 플라즈마전해 산화막 두께 성장에 따른 내식특성
B
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C
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K
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최보은, 정원섭, 김용환
Korean J. Met. Mater.
2020;58(2):87-96. Published online 2020 Jan 8
DOI:
https://doi.org/10.3365/KJMM.2020.58.2.87
Abstract
The growth of the PEO coating with processing time on an AZ31B magnesium alloy in a dilute alkaline electrolyte containing silicate and the corrosion characteristics according to its thickness were investigated. The oxide film grew a porous outer layer mainly consisting of silicate with the spark discharge phenomenon from the.....
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Cited By 2
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알칼리 가스에 의한 SiC 및 Si
3
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의 침식 거동
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김주훈, 김강민, 이지아, 김정일, 한정환
Korean J. Met. Mater.
2020;58(1):17-25. Published online 2019 Dec 12
DOI:
https://doi.org/10.3365/KJMM.2020.58.1.17
Abstract
Studies of effective furnace cooling technology and refractory materials have extended the lifetime of a blast furnace to more than 15 years. On the other hand, the replacement of refractories in the blast furnace results in considerable cost and time loss for stopping the blast furnace operation. Various kinds of.....
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3가 크롬 도금욕에서 펄스 도금의 전기화학적 변수 최적화를 통한 크롬 도금막의 내식성 향상 연구
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임채원, 임동욱, 구본일, 심상은, 백성현
Korean J. Met. Mater.
2019;57(10):641-647. Published online 2019 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2019.57.10.641
Abstract
Electroplating chromium films in a trivalent chromium bath has been extensively investigated as a replacement for the conventional hexavalent chromium bath. However, commercialization of the trivalent chromium method has been hindered because the resulting chromium films exhibit inferior mechanical properties compared to hexavalent chromium coated film. In this study, we.....
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Fe-18Mn강의 응력부식균열 거동에 미치는 크롬과 질소의 영향
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최희수, 김수민, 성효경, 김성준, 김상식
Korean J. Met. Mater.
2019;57(10):624-631. Published online 2019 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2019.57.10.624
Abstract
High-Mn steels developed for offshore industries require good resistance to stress corrosion cracking (SCC) in seawater. Elements like Cr and N are often added to improve the resistance to SCC. In this study, the SCC behavior of Fe18Mn3Cr0.1N and Fe19Mn19Cr0.6N steels in artificial seawater was examined. Slow strain rate tests.....
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Cited By 5
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Ni 및 Cu 첨가가 고온 산화된 자동차용 초고강도 강재의 부식 거동에 미치는 영향
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류승민, 성환구, 김정길, 황중기, 이만재, 오민석, 김성진
Korean J. Met. Mater.
2019;57(6):343-351. Published online 2019 May 16
DOI:
https://doi.org/10.3365/KJMM.2019.57.6.343
Abstract
The incomplete elimination of oxide scale formed during the normalizing process can result in severe degradation of the surface and mechanical properties of ultra-strong steels. This study revealed that the formation of oxide scale was highly dependent upon the alloying elements Ni and Cu. Ni-bearing steel showed a much higher.....
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Cited By 2
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Korean J. Met. Mater.
2019;57(4):236-244. Published online 2019 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.4.236
Abstract
ASTM P91 steel (viz. 9Cr-1Mo steel) was hot-dip aluminized to form a ~70 μm thick coating, and was then corroded in N2/0.1%H2S gas for 50 h at 800 and 900 ºC, to study the effect of aluminizing on the corrosion resistance of P91 steel in highly corrosive H2S environments. Before.....
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Cited By 2
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크롬과 니켈 첨가가
α
-Fe 표면의 염소 가스 부식 특성에 미치는 영향
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김지웅, 김명재, 서창열, 류정호, 류태공, 홍혜진, 서용재
Korean J. Met. Mater.
2019;57(2):108-114. Published online 2019 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.2.108
Abstract
As energy generation by recycling biomass has become increasingly attractive, research on biomass recycling has focused on improving operational efficiency. To develop a new material composition for the inner wall of a biomass boiler, we investigated the effect of Cr and Ni addition on the resistance of the α-iron (100).....
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Cited By 1
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아연-마그네슘-알루미늄 합금도금강판의 도장 내식성 및 밀착성
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이재원, 박보라, 김성진
Korean J. Met. Mater.
2019;57(2):77-83. Published online 2019 Jan 9
DOI:
https://doi.org/10.3365/KJMM.2019.57.2.77
Abstract
Zn-Al-Mg alloy galvanized steel sheets have excellent corrosion resistance and improved cut-edge corrosion resistance. Most of the galvanized steel sheets used for outdoor applications are coated again on the galvanizing layer, or after a plastic film is laminated. As the corrosion products formed by the corrosion of Zn accumulate over.....
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Cited By 5
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항공용 고강도 7xxx계 알루미늄 합금의 3.5% NaCl 수용액에서의 응력부식균열 저항성
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이유림, 최희수, 안수진, 이철주, 김상식
Korean J. Met. Mater.
2018;56(10):708-717. Published online 2018 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.10.708
Abstract
For proper maintenance and inspection scheduling of aircraft, it is extremely important to measure the resistance to stress corrosion cracking (SCC) behavior of aluminum alloys used for aircraft structures. The SCC resistances of high-strength 7xxx-series aluminum alloys, including 7050-T7451, 7475-T7351 and 7140-T7451, were evaluated along longitudinal (L) and transverse (T).....
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Cited By 2
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