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{10-12} 쌍정이 저온 시효 중 Mg-8Al-0.5Zn 합금 압출재의 석출거동에 미치는 영향
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김현지, 김예진, 박성혁
Korean J. Met. Mater.
2024;62(8):662-671. Published online 2024 Jul 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.8.662
Abstract
This study investigates the influence of {10–12} twins on the aging behavior of an extruded Mg–8Al–0.5Zn (AZ80) alloy during aging at 150 °C. The extruded AZ80 alloy is subjected to a compressive strain of 6% along the transverse direction and is subsequently aged at 150 °C. The sample with {10–12}.....
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알루미늄-아연-마그네슘 합금의 원자단위 투과전자현미경 관찰 기반 η
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석출물 성장 고찰
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김황선, 한흥남
Korean J. Met. Mater.
2024;62(8):656-661. Published online 2024 Jul 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.8.656
Abstract
Aluminum-Zinc-Magnesium (Al-Zn-Mg) alloys are extensively utilized in aerospace and automotive industries because of their exceptional mechanical properties and light weight. These properties of Al-Zn-Mg alloys are significantly influenced by the morphology, distribution, and size of the precipitates within the alloy, which result from the formation of numerous nanoscale precipitates. Among.....
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Er 합금 원소 첨가를 통한 인장 물성과 절삭성이 우수한 Ti 합금 개발
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최이슬, 오정목, 박찬희, 이욱진, 박용호, 원종우
Korean J. Met. Mater.
2024;62(3):171-179. Published online 2024 Mar 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.3.171
Abstract
This study demonstrates that the addition of the rare earth element Erbium (Er) significantly enhances the machinability and tensile properties of titanium (Ti). Pure Ti alloys and Er-added Ti alloys with 0.5-1.1 wt.% Er content were prepared, and their microstructure, machinability, and tensile properties were compared. Two different types of.....
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Ni-based 초내열합금의 미세조직, 인장특성, δ 석출상에 미치는 열처리 온도의 영향
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송전영, 구지호, 신종호, 조원희, 이초현, 설재복, 마영화
Korean J. Met. Mater.
2024;62(1):32-38. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.32
Abstract
Here, we investigated the influence of δ-precipitate (orthorhombic D0a Ni
3
Nb-ordered phase) on the room- and high-temperature tensile properties in wrought nickel-based Inconel 625 superalloys subjected to solution and aging heat treatment. Typically, solution heat-treatment temperatures in these alloys affect the solid-state precipitation of δ-phase, which governs high-temperature tensile properties. While.....
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일방향 응고 CM247LC 초내열합금 크리프 시편 게이지에서 고온 산화가 표면 피트 및 재결정 형성에 미치는 영향
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최병학, 최광수, 한성희, 김대현, 안종기, 강동수, 서성문
Korean J. Met. Mater.
2023;61(12):951-957. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.951
Abstract
This study analyzed a recrystallization phenomenon that occurred simultaneously with hightemperature oxidation on the surface of a directionally solidified CM247LC creep specimen, using optical and scanning electron microscopy. After heat treatment, the surface of the specimen subjected to the creep test at 982oC was oxidized by exposure to high temperature.....
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Web of Science 1
Crossref 1
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Al-Si-Mg합금에서 Mg함량과 주조응고 후 냉각속도가 T5 처리시 기계적 특성에 미치는 영향
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손현우, 구태민, 조영희, 이정무
Korean J. Met. Mater.
2023;61(7):472-479. Published online 2023 Jun 21
DOI:
https://doi.org/10.3365/KJMM.2023.61.7.472
Abstract
The effects of Mg content and cooling rate on the T5 treatment of Al-Si-Mg alloys have been investigated using Avrami kinetics and transmission electron microscopy. The alloys were super-heated at 800
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Web of Science 5
Crossref 5
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STS 347 오스테나이트계 스테인리스강의 재열균열에 미치는 석출물과 냉간 가공의 영향
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유일, 고석우, 김재윤, 황병철
Korean J. Met. Mater.
2022;60(2):102-113. Published online 2022 Jan 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.2.102
Abstract
The aim of this study was to investigate the effect of precipitates and cold working on the reheat cracking of STS 347 austenitic stainless steel. Three different heat treatments to form NbC and M
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precipitates were applied to the STS 347 austenitic stainless steel and 10% pre-strain was additionally introduced.....
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Web of Science 3
Crossref 3
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Al-Mg-Si 합금의 초기 석출물이 비대칭 압연에 의한 전단변형에 미치는 영향 : 집합조직과 성형성
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채원기, 김봉규, 이종범, 한준현
Korean J. Met. Mater.
2020;58(10):703-714. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.703
Abstract
Al-Mg-Si alloy was rolled asymmetrically at several temperatures to apply shear deformation, and the effects of the initial precipitate on shear deformation, texture evolution, formability, and plastic anisotropy were studied. Texture was analyzed using a EBSD, and the formability and plastic anisotropy of the specimen were evaluated using the value.....
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Web of Science 9
Crossref 9
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9Cr-1Mo-V-Nb 용착금속에서 생성된 탄화물이 고온 인장강도에 미치는 영향
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문병록, 이정훈, 강남현, 이태호, 정우상, 박철규, 조경목
Korean J. Met. Mater.
2019;57(7):422-429. Published online 2019 Jun 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.7.422
Abstract
Alloy design of 9Cr-1Mo-V-Nb weld metals was carried out through thermodynamic simulation, and elevated temperature tensile testing was performed on the designed alloy. Based on the thermodynamic simulation of the 9Cr-1Mo-V-Nb weld metal, 0.09 to 0.10 wt% C was added to increase Cr-rich M
23
C
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. Nitrogen was reduced from 0.04 to.....
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