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고신뢰성 적층 세라믹 커패시터를 위한 침식방지형 주석도금액 개발
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구본일, 김준성, 손유진, 민경석, 백성현
Korean J. Met. Mater.
2024;62(3):180-189. Published online 2024 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.180
Abstract
Capacitors not only store and release electricity but selectively conduct alternating current. Among the various types of capacitors, multi-layer ceramic capacitors (MLCCs) have been widely used in automotive, smartphone, and wearable devices because of their compact size and high capacitance capabilities. In this study, we have developed an electrolyte for.....
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Ti-xMo-2Fe 베타계 타이타늄 합금의 기계적 특성 및 부식 특성에 미치는 Mo의 영향 평가
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박정연, 이재관, 이용재, 이동근
Korean J. Met. Mater.
2024;62(2):125-131. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.125
Abstract
Titanium alloys are currently used in offshore industries. The titanium alloys used in offshore plants need to have excellent corrosion resistance and mechanical properties because offshore plants are exposed to harsh corrosive environments. At this time, the Ti-6Al-4V ELI alloy is mainly used in offshore plants because it has excellent.....
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SS304L 표면 오염물질 제거를 위한 고출력 레이저 클리닝 영향 분석
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최수진, 유현종, 최지연, 노지환, 강희신, 안상훈, 박준수, 최필공, 김도현, 김영규, 김병주, 전익근, 김정오, 손현기, 김경한, 박창규
Korean J. Met. Mater.
2024;62(2):73-80. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.73
Abstract
In this study, artificially formed corrosion and paint layers on 304L stainless steel (SS304L) specimen were removed using a kilowatt level high-power Nd:YAG laser. A laser power of 1140 W and a pulse duration of 89 ns were used for the corrosion removal, and a laser power of 850 W.....
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브레이크 마찰재의 마찰특성에 미치는 부식 환경의 영향
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신희섭, 김율구, 이상목
Korean J. Met. Mater.
2023;61(12):943-950. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.943
Abstract
The friction properties of brake friction materials are investigated utilizing the different car cleaners. Water, wheel cleaner and tire dressing were used to designate driving conditions in the field. The friction materials were soaked in each solution before friction test. The Coefficient of friction (COF) was similar in the case.....
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API 강재에 첨가된 미량의 합금원소(Cr, Mo)가 CO
2
포화염수 환경 내 부식거동에 미치는 영향
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윤덕빈, 방혜린, 김완근, 김성진
Korean J. Met. Mater.
2023;61(12):896-908. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.896
Abstract
This study examined the effects of minor alloying elements (Cr and Mo) on the corrosion behaviors of API grade steel in CO
2
-saturated near-neutral aqueous solutions. Various experimental and analytical methods were applied to gain insights into the underlying CO
2
corrosion mechanism of the steels. The findings revealed that steel with.....
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Web of Science 1
Crossref 1
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염수환경 내 해드필드강 용접열영향부의 부식 및 침식-부식 거동에 미치는 Cr 첨가의 영향
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진승우, 박진성, 윤덕빈, 이상철, 최종교, 오민석, 김성진
Korean J. Met. Mater.
2023;61(12):883-895. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.883
Abstract
The corrosion and erosion-corrosion behaviors in the weld heat-affected zone (HAZ) of Hadfield steels with varying Cr contents (1, 2, and 3 wt%) were examined. Various experimental methods, including electrochemical polarization, impedance, and weight loss measurements, were utilized. Two types of isothermal heat treatments were conducted in a box furnace.....
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복합화력발전 내 배열회수 보일러용 소재(탄소강 계열 및 듀플렉스 스테인리스강(UNS S32205))의 황산농도에 따른 부식거동 비교 연구
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장유성, 박진성, 홍승갑, 김성진
Korean J. Met. Mater.
2023;61(11):830-841. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.830
Abstract
This study examined the effects of sulfuric acid concentrations on the corrosion behaviors of three types of commercial steels, conventional carbon steel (SA192), sulfuric acid dew resistant steel (S-TEN), and duplex stainless steel (S32205), considered to be potential materials for the heat recovery steam generator (HRSG) in combined cycle power.....
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해양구조용 18Mn(V, Mo)강 내 Cr 첨가가 해수환경 내 부식-마모 복합거동에 미치는 영향
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윤덕빈, 박진성, 이상철, 최종교, 김성진
Korean J. Met. Mater.
2023;61(9):633-641. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.633
Abstract
The objective of this study was to examine the wear-corrosion behavior of 18Mn(V, Mo) steel, which had a minor amount of Cr addition (< 3 wt%), in an artificial seawater environment, and compare it to conventional carbon steel. A variety of electrochemical experiments, including linear polarization resistance, impedance spectroscopy, and.....
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Web of Science 1
Crossref 2
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소형원자로 내식성 향상을 위한 Alloy 82 분말의 레이저 클래딩 연구
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최인성, 정원찬, 송단비, 서정, 이광현, 김용재, 정인철
Korean J. Met. Mater.
2023;61(8):561-572. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.561
Abstract
There has been an increased demand for surface modification technologies to enhance corrosionresistance and wear-resistance. Among the representative surface coating technologies, laser cladding has attracted great attention because of its multiple advantages including low heat input, low dilution ratio, controllable clad height, etc. Recently, laser cladding has been considered as.....
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Crossref 1
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UNS N07718의 묽은 사워(sour) 모사 용액 내 국부 부식 거동
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이예진, 이준섭, 권순일, 신정호, 조영태, 김석, 이재현
Korean J. Met. Mater.
2023;61(8):553-560. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.553
Abstract
The localized corrosion behavior of precipitation-hardened UNS N07718 was investigated by immersion tests in 6 wt% FeCl
3
+ 1.0 wt% HCl and the use of electrochemical techniques in a simulating solution of a diluted-sour environment of 25 wt% NaCl + 0.5 wt% CH
3
COOH. The Ti carbides and Nb-Mo carbides with.....
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Web of Science 2
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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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Crossref 1
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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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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.....
More
Web of Science 1
Crossref 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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Web of Science 3
Crossref 2
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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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Crossref 1
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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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Web of Science 5
Crossref 5
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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 6
Crossref 4
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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.....
More
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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.....
More
Web of Science 2
Crossref 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
®
.....
More
Web of Science 3
Crossref 3
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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.....
More
Web of Science 6
Crossref 6
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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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Web of Science 3
Crossref 3
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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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Web of Science 3
Crossref 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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Web of Science 5
Crossref 4
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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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Web of Science 4
Crossref 4
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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.....
More
Crossref 1
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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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Web of Science 5
Crossref 5
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염수환경 내 Zn-Al-Mg 합금도금강재의 공정조직 부식거동
J
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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.....
More
Web of Science 8
Crossref 7
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A516-65급 압력용기용 강재의 용접모사 열처리를 통한 용접열영향부의 수소확산 및 황화물응력균열 거동 연구
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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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Web of Science 4
Crossref 4
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스테인리스강 SS304의 균열 형상과 에치 피트를 이용한 응력부식균열 전파 기구 해석
B
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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,.....
More
Web of Science 2
Crossref 2
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