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Al-Mg-Si-Cu-Mn 합금 압출재의 미세조직 및 기계적 성질에 미치는 용체화 온도와 퀜칭 지연의 영향
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김지수, 정제기, 천현석, 김병주, 임차용, 김수현, 최윤석
Korean J. Met. Mater.
2024;62(2):132-141. Published online 2024 Jan 30
DOI:
https://doi.org/10.3365/KJMM.2024.62.2.132
Abstract
The effect of solution temperature and quench delay on the microstructure and mechanical properties of an extruded Al-Mg-Si-Cu-Mn alloy was investigated by employing differential scanning calorimetry, transmission electron microscopy, hardness test, and tensile test. The extruded specimens were held at 500 and 540
o
C, respectively, for 80 min for solutionizing.....
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La과 Mn으로 이중 도핑된 n형 Mg
3
La
0.005
Mn
x
SbBi의 열전특성
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주성재, 손지희, 장정인, 민복기, 김봉서
Korean J. Met. Mater.
2024;62(1):45-50. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.45
Abstract
Mg
3
Sb
2
-based n-type materials are consisted of earth-abundant elements and possess comparable thermoelectric properties with n-type Bi
2
Te
3
at low temperatures, which make them promising candidates for cooling and power generation applications in terms of cost and performance. Substitution of Sb atom with chalcogen elements (Te, Se S) is a conventional method.....
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Zn-ion 배터리용 ZnMn
2
O
4
양극재의 입자 크기 증가를 통한 Mn
3+
용출 완화로 수명 증가
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박재영, 최영묵, 전상은
Korean J. Met. Mater.
2023;61(12):923-932. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.923
Abstract
ZnMn
2
O
4
(ZMO) cathode possesses a high theoretical capacity of 224 mAh g
-1
and high operating voltage (1.9 V vs. Zn
2+
/Zn) for aqueous Zn–ion batteries. However, the disproportionation reaction of Mn
3+
leads to Mn dissolution in the ZMO cathode, deteriorating lifespan. In this study, we attempted to reduce Mn dissolution by.....
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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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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
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6K 초극저온 인장 시험 : Fe-Mn-Cr 강의 미세조직 및 기계적 물성
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김영균, 임가람, 나영상
Korean J. Met. Mater.
2023;61(6):389-396. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.389
Abstract
Materials with superior cryogenic strength and good ductility are increasingly in demand for resident friendly liquid-hydrogen (20K) storage tanks. Additionally, the space industry also requires materials that retain excellent mechanical properties at extremely low temperatures. However, mechanical testing at such low temperatures is highly limited due to the difficulties in.....
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연속주조 스테인리스강 슬라브의 결정립 조직 예측
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김희수, 김지준
Korean J. Met. Mater.
2023;61(1):60-68. Published online 2022 Dec 28
DOI:
https://doi.org/10.3365/KJMM.2023.61.1.60
Abstract
Macrostructural features in continuously-cast stainless steel slabs such as the distribution of equiaxed and columnar grains, and microporosity, are crucial to the post-processes, and the mechanical properties of the final steel products. Among the methods for controlling grain structure during the continuous casting process, the application of electromagnetic stirring (EMS).....
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Web of Science 1
Crossref 1
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강도조합에 따른 TWB 핫스탬핑 부품의 미세구조 및 충돌성능 비교 분석
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이창욱, 황연정, 허욱, 유병길, 유지홍, 김태정, 윤광민
Korean J. Met. Mater.
2022;60(11):801-810. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.801
Abstract
Hot stamping technology has been steadily developed because it provides both excellent formability and high strength. With the development of TWB hot stamping technology, it is now possible to freely apply the required strength and thickness in the right place. In this study, the microstructure and collision performance of TWB.....
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Web of Science 1
Crossref 2
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Korean J. Met. Mater.
2021;59(9):670-676. Published online 2021 Aug 4
DOI:
https://doi.org/10.3365/KJMM.2021.59.9.670
Abstract
In this work, MnO
2
nanoparticles were embedded in a carbon matrix as a porous composite, fabricated using a simple chemical route followed by low-temperature annealing, with activated carbon (AC) as the carbon source in the composite preparation. The porous MnO
2
/carbon structures contained some selective nanoparticles coated with carbon. The structural.....
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Fe-17Mn-5Si-5Cr 형상기억합금의 형상복원거동 및 기계적 특성에 미치는 Ni, Ti 및 C의 영향
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김도형, 김용환, 옥정중, 이정훈, 박찬희, 이욱진, 박용호
Korean J. Met. Mater.
2020;58(10):660-671. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.660
Abstract
Fe-Mn-Si based shape memory alloy is a new functional material that can be used to apply prestress to civil and structural components such as concrete structures. In this study, the effects of alloying elements Ni, C and Ti on the mechanical and shape memory properties of the alloy were investigated.....
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Web of Science 7
Crossref 7
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Strip Casting 공정으로 제조된 Al 3003 합금의 미세조직, 인장 및 피로 특성에 미치는 후열처리 영향
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백민석, 어광준, 정창열, 이기안
Korean J. Met. Mater.
2020;58(3):151-161. Published online 2020 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.3.151
Abstract
Al 3003 alloy was manufactured by strip casting process, and the effect of post heat-treatment on tensile and fatigue properties was investigated. The strip cast Al 300 alloy exhibited a unique globular shaped rapid-cooled solidification structure, and the microstructural characteristic remained after heat-treatment. Asstrip cast (F) and heat-treated (O) alloys.....
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Web of Science 4
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핫스탬핑 열처리 온도가 Al-10% Si 도금 30MnB5 강의 점용접성에 미치는 영향
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손성국, 황연정, 이창욱, 유지홍, 최민수
Korean J. Met. Mater.
2019;57(12):778-786. Published online 2019 Oct 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.12.778
Abstract
Hot stamping is the most efficient manufacturing process to produce high strength automotive parts with reduced springback. Recently, 30MnB5 steel has been developed for hot stamping steel which can provide above 1700 MPa. However, resistance spot weldability of this steel is insufficient due to the need for a large amount.....
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Web of Science 4
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Zn/Zn-Mg 이중 층 박막의 밀착력 향상을 위한 Zn interlayer 미세구조 제어에 관한 연구
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이승환, 김회근, 송면규, 김정완, 이상율
Korean J. Met. Mater.
2019;57(11):695-700. Published online 2019 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.11.695
Abstract
In this study, the microstructure-controlled Zn interlayers were synthesized to improve the adhesion strength of Zn/Zn-Mg double layer coatings. The coating chamber temperature and working pressure were controlled based on the Structure Zone Model principles, to obtain a dense columnar microstructure in the Zn interlayer. By controlling the coating chamber.....
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Web of Science 1
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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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Web of Science 7
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핫스탬핑용 30MnB5강의 템퍼링 조건에 따른 미세조직 및 기계적 물성 연구
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정준영, 박상천, 신가영, 이창욱, 김태정, 최민수
Korean J. Met. Mater.
2018;56(11):787-795. Published online 2018 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.11.787
Abstract
The effects of tempering condition on the microstructure and mechanical properties of 30MnB5 hot stamping steel were investigated in this study. Before the tempering, hot-stamped 30MnB5 steel was composed of only α′-martensite microstructure without precipitates. After the tempering at 180 ℃ for 120 min, nano-sized ε-carbides were precipitated in the.....
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Crossref 9
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CoCrFeMnNi 고엔트로피 합금에서 탄소 첨가 및 재결정열처리가 미세구조 및 기계적 특성에 미치는 영향
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고준영, 송재숙, 홍순익
Korean J. Met. Mater.
2018;56(1):26-33. Published online 2018 Jan 1
DOI:
https://doi.org/10.3365/KJMM.2018.56.1.26
Abstract
The effect of carbon addition on the cast and rolled microstructures of CoCrFeMnNi high entropy alloys were studied. Both as-cast CoCrFeMnNi and CoCrFeMnNiC0.1 alloys have a dendritic microstructure. Small carbide particles were observed at the inter-dendritic region in the as-cast CoCrFeMnNiC0.1 and elongated-grained structure with aligned carbides were developed at.....
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Crossref 5
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쾌삭 303계 스테인레스강의 열간성형성에 미치는 균질화처리, Mn/S 비 및 델타-페라이트의 영향
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정재영
Korean J. Met. Mater.
2017;55(12):880-887. Published online 2017 Dec 4
DOI:
https://doi.org/10.3365/KJMM.2017.55.12.880
Abstract
To improve the hot-workability of free-machining austenitic stainless steel, we studied the effects of homogenization treatment, Mn/S ratio and the retained δ-ferrite on the hot-workability of 303 austenitic stainless steels. The reduction of area was measured as a function of homogenization temperature in the range of 1160-1250 ℃ and 1-50.....
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Crossref 1
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Fe-Mn-Al-C계 경량철강의 미세조직 및 기계적 물성 변화에 미치는 냉각속도의 영향
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박준영, 박성준, 이재현, 문준오, 이태호, 정경재, 한흥남, 신종호
Korean J. Met. Mater.
2017;55(12):825-835. Published online 2017 Dec 4
DOI:
https://doi.org/10.3365/KJMM.2017.55.12.825
Abstract
The effects of cooling after solution heat treatment on the microstructure and mechanical properties of light-weight steels were investigated using Fe
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30Mn
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xAl
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0.9C alloys containing 9.0–12.8 wt% Al. Lab
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scale specimens (thickness: 10 mm) of the alloys were cooled by different cooling rates from -337 to -0.053 ℃/s using water, air, and furnace.....
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SA508 Gr.3 상용 원자로용기강의 두께방향 미세조직 변화가 인장 및 충격특성에 미치는 영향
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홍석민, 이초롱, 김민철, 이봉상
Korean J. Met. Mater.
2017;55(11):752-759. Published online 2017 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2017.55.11.752
Abstract
In this study, the effects of microstructural variations in heavy-section reactor pressure vessel (RPV) steels on tensile and Charpy impact properties were investigated. Two PRV blocks, OPR1000 and APR1400 (ORV, ARV) were taken from the archive materials used in Korea standard nuclear power plants. Test specimens were sampled from five.....
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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
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,Mn
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O
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,FeO,Fe
2
O
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, and FeMn
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O
4
oxides with relatively.....
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