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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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Seed를 이용한 단결정 초내열합금 CMSX-4에서 응고속도 및 열처리에 따른 미세조직 변화
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권순철, 신종호, 임근영, 성기태, 윤병관, 정의석, 이재현
Korean J. Met. Mater.
2018;56(10):745-754. Published online 2018 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.10.745
Abstract
The CMSX-4 superalloy including refractory elements was directionally solidified using the seed of a [001] single crystal to control the growth direction to [001], where solidification velocity was changed from 25 to 160 μm/s. In the log-log plot between spacing and solidification velocity, the primary dendrite arm spacing and secondary.....
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CMSX-4 초내열합금에서 일방향 응고속도와 온도경사의 변화에 따른 1차 수지상 간격 예측
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신종호, 성창훈, 권순철, 권석환, 장병문, 이재현
Korean J. Met. Mater.
2018;56(9):674-679. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.674
Abstract
Directional solidification experiments were carried out to estimate the effect of solidification velocity and temperature gradient on primary dendrite arm spacing (PDAS) in the Ni-based superalloy, CMSX-4 alloy. The specimens were solidified at velocities of 1, 5, 25, 50 and 100 mm/s under given temperature gradients of 12.5, 18, 23.....
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10Cr1MoW강에서 응고속도에 따른 δ 페라이트 형성거동
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권순철, 주윤곤, 성창훈, 손명균, 신종호, 서성문, 이재현
Korean J. Met. Mater.
2018;56(8):589-596. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.589
Abstract
Martensitic 10Cr1MoW steels are widely used for high temperature components in turbine engines because they have good mechanical properties and corrosion resistance. Delta-ferrite can form locally in large ingots and the ferrite phase degrades the metal’s high-temperature properties. To decrease the fraction of delta-ferrite the solidification process should be controlled......
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중탄소강 SAW 용접금속의 응고 균열 발생에 미치는 용접재료의 영향
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방국수, 송우현, 정홍철
Korean J. Met. Mater.
2018;56(2):137-145. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.137
Abstract
The effects of submerged-arc welding consumables, wire and flux, on solidification cracking in the weld metal of medium-carbon steel were investigated. It showed that weld metal with a greater amount of C, S, and P had a wider brittleness temperature range, BTR, which resulted in longer total and maximum crack.....
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Cu가 첨가된 Zn-Al 합금에서 일방향응고 및 냉간인발에 따른 기계적 특성 향상
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정해창, 김민수, 안지혁, 임성환, 한승전, 이재현, 김광호
Korean J. Met. Mater.
2017;55(8):529-536. Published online 2017 Aug 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.8.529
Abstract
The lamellar structure of two phases, the Zn-rich and Al-rich phases, is formed in a Zn-5 wt% Al eutectic alloy. In order to study the effect of microstructural changes on the tensile properties of eutectic Zn-Al binary alloy, Zn-Al and Zn-Al-Cu alloys were directionally solidified at a growth rate of.....
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무기합성매질을 이용한 LiCl-KCl 공융염 내 희토류 핵종(Nd)의 포집 및 고화
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김나영, 은희철, 박환서, 안도희
Korean J. Met. Mater.
2017;55(6):419-426. Published online 2017 Jun 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.6.419
Abstract
In this study, neodymium (Nd) nuclides in LiCl-KCl eutectic salts were captured and solidified using a synthetic inorganic composite (Li
2
O-SiO
2
-Al
2
O
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-B
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), a process that allows the selective capture of Nd and fabrication of a composite with Nd captured from waste, without additional additives or mixing. The Nd nuclides in the LiCl-KCl.....
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Korean J. Met. Mater.
2017;55(3):202-208. Published online 2017 Mar 3
DOI:
https://doi.org/10.3365/KJMM.2017.55.3.202
Abstract
Computational fluid dynamic modeling of a continuous rheo-casting technology was conducted, consistent with the manufacturing of 3
mm
-thin plates made of aluminum alloy A356. The A numerical simulation on of the stabilizing time of the material crystallization was carried out using the ANSYS FLUENT code. Solidification and melting models were.....
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CM247LC 초내열합금에서 일방향응고에 따른 응고조직 변화
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이정석, 권석환, 윤병관, 장병문, 정연길, 이재현
Korean J. Met. Mater.
2016;54(11):838-845. Published online 2016 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.11.838
Abstract
Directional solidification of CM247LC was performed at a constant growth velocity (300 mm/h) using a Bridgman type furnace. Microstructural features, including the number of grains, PDAS, and EBSD IPF map, were investigated with progressive positions from the starter block. As directional solidification proceeded, the number of grains decreased and PDAS.....
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Cited By 2
Casting/Solidification/Heat Treatment
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1Cr-1.25Mo-0.25V 강 잉곳의 응고편석 및 균질화 거동
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김동배, 나영상, 서성문, 이재현
Korean J. Met. Mater.
2016;54(9):659-671. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.659
Abstract
As a first step to optimizing the homogenization heat treatment following high temperature upset forging, the solidification segregation and the homogenization behaviors of solute elements were quantitatively analyzed for 1Cr-1.25Mo-0.25V steel ingot by electron probe micro-analysis (EPMA). The random sampling approach, which was designed to generate continuous compositional profiles of.....
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