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단결정 Ni기 초합금의 결정방위에 따른 수소 취화 민감도 평가
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윤희수, 다오반헝, 권휴상, 이지훈, 남승훈
Korean J. Met. Mater.
2025;63(5):389-398. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.389
Abstract
As demand for hydrogen, a clean energy source, has increased, hydrogen embrittlement caused by hydrogen penetration into materials has became a major challenge. This study evaluated the effect of crystallographic orientation on hydrogen embrittlement sensitivity, using single-crystal Ni-based superalloys that are used in hydrogen gas turbines. The two crystallographic orientations.....
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압력용기용 SA372강의 수소취성에 미치는 Ni 함량과 템퍼링 온도의 영향
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신희창, 황병철
Korean J. Met. Mater.
2025;63(5):380-388. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.380
Abstract
This study investigates the influence of grain boundary characteristics on hydrogen embrittlement in SA372 steels by varying Ni content and tempering temperature. Microstructural characteristics and mechanical properties were analyzed to understand hydrogen trapping behavior, followed by an in-situ slow strain-rate test (SSRT) to assess hydrogen embrittlement resistance and hydrogen-induced fracture.....
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액화수소 저장 용기 제작을 위한 304L 스테인리스 강의 GMAW (Gas Metal Arc Welding) 및 GTAW (Gas Tungsten Arc Welding) 용접부의 초저온 충격인성 및 미세조직 비교
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박재한, 박정열, 김양도, 지창욱
Korean J. Met. Mater.
2025;63(5):344-355. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.344
Abstract
To combat global climate change caused by CO
2
emissions, achieving net-zero emissions through sustainable energy solutions is a global priority. Among alternative energy carriers, hydrogen is a promising renewable energy source due to its efficiency in production, transportation, and storage. Liquefied hydrogen (LH
2
) transportation is gaining attention as it significantly.....
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수위의 이미지 분석 알고리즘을 이용한 충전제가 함유된 황가교 EPDM 고분자 복합체의 수소 기체 충전량 및 확산도 측정 방법
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이지훈, 전상구, 최명찬, 김승연
Korean J. Met. Mater.
2025;63(4):291-304. Published online 2025 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.4.291
Abstract
In hydrogen refueling stations, polymer O-rings are used for high-pressure hydrogen containers and transfer pipes to prevent gas leakage. A technology has been developed to measure the hydrogen uptake and diffusivity of the polymer materials used in these O-rings. The process involves charging the polymer material with hydrogen under a.....
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Korean J. Met. Mater.
2025;63(2):168-176. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.168
Abstract
Water splitting is a sustainable method of hydrogen production that is crucial for achieving carbon neutrality. However, the high cost of green hydrogen remains a major challenge. One strategy to reduce costs is the use of non-precious metal catalysts, such as Co, which is known for its excellent catalytic properties......
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음이온 교환막 수전해용 니켈 기반 수소 발생 반응 촉매의 니켈 산화수 및 입자 크기에 따른 성능 트레이드 오프 연구
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이재훈, 김남인, 진송, 박준영, 하준석, 김치호, 이주영, 김양도, 최승목
Korean J. Met. Mater.
2025;63(2):161-167. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.161
Abstract
The development of green hydrogen through anion exchange membrane water electrolysis (AEMWE) is essential for achieving carbon neutrality. Developing non-precious-metal catalysts for the hydrogen evolution reaction (HER) is crucial for the commercialization of AEMWE. In this study, Ni-CeO
2
/C catalysts were synthesized via a co-precipitation method and a reduction heat treatment.....
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물 분해 수소생산을 위한 전이금속(M) 바이메탈형 CoM-ZIF/CdS 광촉매 제조
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김주현, 이유림, 안채현, 이수민, 김정현
Korean J. Met. Mater.
2024;62(9):713-720. Published online 2024 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.9.713
Abstract
Recently, due to energy shortages and environmental pollution caused by the continued use of fossil fuels, there is a growing need for renewable sources to replace fossil fuels. ZIF-67 has a porous structure, a large surface area, high thermal and chemical stability, and a narrow band gap, so it is.....
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Web of Science 1
Crossref 1
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금속산화물 분말의 수소환원에 의한 W-Ni-Cu 합금분말의 합성
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허연지, 이의선, 최지원, 변종민, 오승탁
Korean J. Met. Mater.
2024;62(5):334-339. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.334
Abstract
The effect of powder processing on the microstructure and sinterability of the heavy alloy W-Ni-Cu was investigated. The heavy alloy powders were prepared by the ball milling and hydrogen reduction of metal oxide powders. As the milling time increased, the size of the powder mixture decreased and at 5 h.....
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Korean J. Met. Mater.
2024;62(4):299-305. Published online 2024 Mar 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.4.299
Abstract
To improve the hydrogen-storage properties of Mg
2
Ni, LiBH
4
was added by milling in hydrogen atmosphere (reactive mechanical milling, RMM). Mg
2
Ni-10LiBH
4
was prepared with a composition of 90 wt% Mg
2
Ni + 10 wt% LiBH
4
. The quantity of released hydrogen (H
r
) versus temperature T curve for Mg
2
Ni10LiBH
4
was obtained by heating at.....
More
Web of Science 1
Crossref 1
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친환경 Ti 및 TiH
2
분말 제조를 위한 TiO
2
의 칼슘열환원에 대한 기초연구
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박성훈, 강정신, 손호상
Korean J. Met. Mater.
2024;62(3):190-203. Published online 2024 Feb 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.190
Abstract
To develop an eco-friendly titanium (Ti) production process, the calciothermic reduction of titanium dioxide (TiO
2
) was investigated. The mechanism involved in the reduction of TiO
2
using calcium (Ca) was examined. The influence of a molten salt, calcium chloride (CaCl
2
), on the calciothermic reduction was investigated by conducting experiments at 1123.....
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Web of Science 1
Crossref 1
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전기화학적 및 고압 수소 분위기하 템퍼드 마르텐사이트강의 수소취화 특성 비교
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김상규, 김재윤, 서현주, 정환교, 박재영, 백운봉, 황병철
Korean J. Met. Mater.
2023;61(11):807-814. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.807
Abstract
The effect of hydrogen charging methods on the hydrogen embrittlement characteristics of tempered martensitic steels were discussed in terms of hydrogen diffusion behavior. Two tempered martensitic steels with different Si content were fabricated by quenching and tempering. The steel with high Si content had a lower cementite fraction because the.....
More
Web of Science 2
Crossref 2
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황 함량 변화가 NiZnS 복합광촉매의 태양광 물분해 효율에 미치는 영향
J
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김주현, 강은선, 김정현
Korean J. Met. Mater.
2023;61(4):284-290. Published online 2023 Mar 22
DOI:
https://doi.org/10.3365/KJMM.2023.61.4.284
Abstract
Solar energy is attracting much attention as an eco-friendly source for future energy needs. Herein, NiZnS photocatalysts were synthesized with a hydrothermal method at various sulfur contents. The ZnS material is widely used as a photocatalyst because of its high stability, low toxicity, and excellent charge separation characteristics. Nickel is.....
More
Web of Science 6
Crossref 7
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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......
More
Web of Science 6
Crossref 4
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Korean J. Met. Mater.
2023;61(2):115-119. Published online 2023 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2023.61.2.115
Abstract
As interest in hydrogen energy grows, eco-friendly methods of producing hydrogen are being explored. CuBi
2
O
4
is one of the p-type semiconductor cathode materials that can be used for photoelectrochemical hydrogen production via environment-friendly water electrolysis. CuBi
2
O
4
has a bandgap of 1.5 – 1.8 eV which allows it to photogenerate electrons.....
More
Web of Science 1
Crossref 1
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소부경화강의 변형 시효 및 수소취성 거동에 미치는 미세조직의 영향
J
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김재윤, 고석우, 황병철
Korean J. Met. Mater.
2022;60(11):811-818. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.811
Abstract
The strain aging and hydrogen embrittlement behavior of two bake hardening (BH) steels with different microstructures were investigated in this study. The single-phase BH steel was composed of fully ferrite, while the dual-phase BH steel consisted of ferrite and 3 % martensite. The BH index and aging index (AI) of.....
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Web of Science 4
Crossref 4
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수소 저장용 다공성 제올라이트 탐색을 위한 고속 대량 스크리닝 계산
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여병철
Korean J. Met. Mater.
2022;60(7):537-544. Published online 2022 Jun 3
DOI:
https://doi.org/10.3365/KJMM.2022.60.7.537
Abstract
Hydrogen is considered an attractive energy resource because it is eco-friendly in contrast with fossil fuels. Hydrogen storage remains as essential technology for increasing the use of the hydrogen in applications such as hydrogen vehicles and fuel cells. Hydrogen storage requires retaining a high density of hydrogen molecules at ambient.....
More
Web of Science 1
Crossref 3
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Korean J. Met. Mater.
2022;60(3):180-187. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.180
Abstract
In this study, Ti-10Mo alloy powder and sintered bodies were successfully fabricated using a threestep process of acid/organic solvent cleaning, hydrogenation/dehydrogenation (HDH) of bulk Ti-Mo scrap, and pressureless vacuum sintering of the alloy powder. This process can be used to recycle valuable Ti alloy. And unlike remelting-based recycling processes, in.....
More
Web of Science 5
Crossref 5
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수소 분위기에서 Mg와 VCl
3
의 밀링에 의한 Mg의 수소 흡수 방출 특성의 향상
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송명엽, 이성호, 곽영준
Korean J. Met. Mater.
2021;59(10):709-717. Published online 2021 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.10.709
Abstract
VCl
3
(vanadium (III) chloride) was selected as an additive to Mg to increase the hydrogenation and dehydrogenation rates and the hydrogen storage capacity of Mg. Instead of MgH
2
, Mg was used as a starting material since Mg is cheaper than MgH
2
. Samples with a composition of 95 wt% Mg +.....
More
Crossref 5
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미량의 H
2
S 함유 수용액 환경 내 CO
2
첨가가 고강도 철강소재의 부식 및 수소침투거동에 미치는 효과
S
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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.....
More
Web of Science 3
Crossref 3
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초음파 분무 열분해법으로 제조한 텅스텐 미세분말의 미세조직과 소결 거동
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조현희, 김정현, 이영인, 정영근, 오승탁
Korean J. Met. Mater.
2021;59(5):289-294. Published online 2021 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.5.289
Abstract
The powder microstructure and sintering behavior of W prepared by ultrasonic spray pyrolysis and spark plasma sintering were investigated. Fine-grained W powders were synthesized by ultrasonic spray pyrolysis using an ammonium metatungstate hydrate solution and hydrogen reduction. The XRD analysis of the powder, pyrolyzed below 600
o
C, showed tungsten oxide.....
More
Web of Science 3
Crossref 3
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Korean J. Met. Mater.
2021;59(4):268-272. Published online 2021 Mar 24
DOI:
https://doi.org/10.3365/KJMM.2021.59.4.268
Abstract
Boron Nitride Nanotubes (BNNT) are one of the candidate materials for storing hydrogen by physical adsorption. It has been reported that this hydrogen storage capacity increases as the crystallinity of the nanostructures decreases. Here, BNNT was synthesized using an RF plasma torch system, and the surface of the BNNT was.....
More
Web of Science 4
Crossref 4
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인장강도 600 MPa급 저탄소강 필렛 용접부의 저온균열과 미세조직에 따른 수소취성 민감성 및 수소확산 거동
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안형진, 이정훈, 박한지, 유재석, 정성욱, 박종민, 강남현
Korean J. Met. Mater.
2021;59(1):21-32. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.21
Abstract
Hydrogen flowing into a weld causes hydrogen embrittlement (HE), so to prevent cold cracks in the weld, HE must be suppressed. In this study, single-pass fillet weldments were fabricated using two different welding fillers with the same strength level as the American Welding Society standard. The specimen F-HNi, which had.....
More
Web of Science 9
Crossref 8
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구리함량 변화에 따른 Cu
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S 광촉매 제조 및 태양광 물분해 수소 생산 특성 연구
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강수진, 김정현
Korean J. Met. Mater.
2020;58(12):907-914. Published online 2020 Dec 4
DOI:
https://doi.org/10.3365/KJMM.2020.58.12.907
Abstract
Solar water splitting is an attractive method for producing hydrogen from renewable natural resources, and heterostructure photocatalysts have been widely investigated for photocatalytic applications. Hetero-component photocatalysts can reduce the charge recombination process by improving electron utilization, and are considered promising candidates for solar water splitting. Amongst various heterostructure systems, combinations.....
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Web of Science 8
Crossref 7
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페라이트-펄라이트 조직 저탄소강의 수소 취성에 미치는 Nb 첨가와 예비 변형의 영향
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고석우, 이지민, 황병철
Korean J. Met. Mater.
2020;58(11):752-758. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.752
Abstract
The effect of pre-strain on the hydrogen embrittlement of Nb-free and Nb-added low-carbon steels with ferrite-pearlite structure was investigated in this study. After the steels were electrochemically charged with hydrogen, slow-strain rate tensile (SSRT) tests were conducted on them to examine hydrogen embrittlement behavior. The SSRT test results revealed that.....
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Web of Science 4
Crossref 4
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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 6
Crossref 6
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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 5
Crossref 5
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스테인리스강 SS304의 균열 형상과 에치 피트를 이용한 응력부식균열 전파 기구 해석
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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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Web of Science 2
Crossref 2
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Korean J. Met. Mater.
2019;57(10):663-672. Published online 2019 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2019.57.10.663
Abstract
The dehydrogenation rates of graphene-added Mg (named Mg-5graphene) were very low at 573 K and 593 K. Ni was added to increase the dehydrogenation rates of graphene-added Mg. Samples (designated as Mg-2.5Ni-2.5graphene) with a composition of 95 wt% Mg + 2.5 wt% Ni + 2.5 wt% graphene were prepared by.....
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Web of Science 8
Crossref 7
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Korean J. Met. Mater.
2019;57(8):491-498. Published online 2019 Jul 11
DOI:
https://doi.org/10.3365/KJMM.2019.57.8.491
Abstract
Hydrogen-induced cracking (HIC) behavior was analyzed for gas metal arc (GMA) and laser beam (LB) welds on American Petroleum Institute (API) X65 steel. The GMA welds consisted of acicular ferrite (AF) with some widmanstatten ferrite (WF), while the LB welds had bainitic ferrite (BF) with some AF. The welds and.....
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Web of Science 8
Crossref 7
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Korean J. Met. Mater.
2019;57(7):405-411. Published online 2019 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.7.405
Abstract
This paper discusses a molybdenum-added alloy design for normalized pressure vessel steels, to reduce hydrogen induced cracking (HIC) and inhibit crack propagation. The change in microstructure produced by the modified alloy composition was analyzed to determine its effect on HIC characteristics. The microstructural change was observed by optical microscopy, hardness.....
More
Web of Science 6
Crossref 5
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