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Korean J. Met. Mater.
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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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Korean J. Met. Mater.
2024;62(1):57-64. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.57
Abstract
Carbon fiber reinforced polymer (CFRP) has been extensively used in civil engineering for applications such as reinforcing and retrofitting various architectural materials. Therefore, understanding the degradation of CFRP under high temperatures is important. This study aims to investigate the thermomechanical and microstructural properties of CFRP plates at elevated temperatures up.....
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WC-20wt%Co 초경 합금의 미세 조직 변화에 따른 인장 및 피로 성질
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조규섭, 김경일, 노우람
Korean J. Met. Mater.
2023;61(12):933-942. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.933
Abstract
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging dies and cutting tools. The tensile and fatigue properties of WC-20wt%Co cemented carbides with microstructural variations were investigated. Microstructure parameters such as Co binder content, WC particle size, binder mean free path,.....
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Korean J. Met. Mater.
2023;61(11):815-823. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.815
Abstract
The microstructure, tensile and fatigue properties of a martensitic stainless steel (MSS) plate with a thickness of 0.152 mm are investigated in this study. The microstructural properties were initially studied using electron backscatter diffraction microscopy. High dislocation densities were observed in the microstructure, along with the rolling texture revealed by.....
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Korean J. Met. Mater.
2023;61(10):800-806. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.800
Abstract
Glass fiber-reinforced polymers (GFRPs) have attracted significant attention as structural materials because of their high fatigue resistance, corrosion resistance, strength, and stiffness. This study examined the effect of elevated temperatures (150, 250, 350, and 450oC) on the microstructural and mechanical properties of GFRP plates. The number of bubbles increased as.....
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Crossref 1
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Cu 및 Zr 첨가 A356 합금의 열처리 조건에 따른 상 변화와 기계적 특성 분석
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송태웅, 구자욱, 전승병, 정창열
Korean J. Met. Mater.
2023;61(5):311-323. Published online 2023 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.5.311
Abstract
Cast A356(Al-Si-Mg) alloys are widely used in automotive and general applications because of their mechanical properties and castability. Al-Si-Mg-(Cu) alloys typically lose their strength above 170 o C due to coarsening of precipitates, which limits their application to components. To maintain their strength at elevated temperature, Al-Si-Mg-(Cu) alloys are modified.....
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Ni기 초내열 개발 합금(LESS)의 고온 인장특성에 미치는 결정립계 형상의 영향
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신용관, 강병일, 윤정일, 권용남, 김영직
Korean J. Met. Mater.
2022;60(12):940-949. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.940
Abstract
In order to investigate the mechanical properties of the developed wrought γ'-hardened Ni-based superalloy, LESS alloy (Low Eta Sigma Superalloy), and to understand the deformation behavior, tensile tests were carried out from room temperature to 800oC in comparison with IN 740H alloy. Like other superalloys, the tensile properties of the.....
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Web of Science 2
Crossref 5
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미소 시편을 이용한 가스터빈 블레이드 사용품의 인장 및 미세조직 특성평가
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김영대, 하인생, 방지예, 정진성
Korean J. Met. Mater.
2022;60(11):865-871. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.865
Abstract
A gas turbine (GT) blade is a key hot-pass component for advanced GT engines, and should have stable properties under extreme conditions of 1,350°C and 3,600rpm, etc. The GT blade, after operating with nearly 800 equivalent start-stops (ES) or 24,000 equivalent operation hours (EOH), should be replaced due to degradation.....
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일방향응고한 GTD-111 초내열합금의 황 함량에 따른 미세조직 및 고온 기계적 특성
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강동수, 이형수, 윤대원, 정희원, 유영수, 서성문
Korean J. Met. Mater.
2022;60(10):782-792. Published online 2022 Sep 29
DOI:
https://doi.org/10.3365/KJMM.2022.60.10.782
Abstract
The influence of trace amounts of sulfur (S) on the microstructural evolution, tensile and creep properties in directionally solidified (DS) Ni-based superalloy GTD-111 were systematically investigated. Doping of S in the range of < 1 to 154 ppm resulted in the formation of a Ti
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SC-type carbosulfide phase near the coarse.....
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과공정 Al-15wt.%Si 합금의 Primary Si 미세화와 인장 및 피로 특성에 미치는 EMS 공정의 영향
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백민석, 강태훈, 김종호, 박준표, 어광준, 이기안
Korean J. Met. Mater.
2022;60(5):360-369. Published online 2022 Apr 22
DOI:
https://doi.org/10.3365/KJMM.2022.60.5.360
Abstract
This study investigated the effect of the electromagnetic stirring (EMS) process on the microstructure and mechanical properties of hyper-eutectic Al-15 wt.%Si alloy. The tensile and high-cycle fatigue properties of the EMS Al-15wt.%Si alloy were examined and compared with conventional direct chill (DC) cast alloy. The initial microstructure of the as-cast.....
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Web of Science 1
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Ni-Cr-Mo-V계 저합금강의 미세조직과 기계적 특성에 관한 연구
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조무근, 류성현, 김경일, 김동응, 김정인, 김경택, 김상섭, 조규섭
Korean J. Met. Mater.
2022;60(4):251-262. Published online 2022 Mar 28
DOI:
https://doi.org/10.3365/KJMM.2022.60.4.251
Abstract
Ni-Cr-Mo-V steel alloys for high-speed railway brake discs were prepared to investigate the effect of alloying element contents on the microstructure and mechanical properties. The Cr, Mo, Mn alloying elements were incorporated into the steel alloys, which contained low carbon content in the range 0.16 wt.% ~ 0.21 wt.% to.....
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Web of Science 5
Crossref 5
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소결 방법에 따른 WC-20wt%Co 초경합금의 인장 특성 및 피로 수명
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류성현, 조무근, 김경일, 노우람, 홍익제, 이광희, 김상섭, 조규섭
Korean J. Met. Mater.
2022;60(3):227-236. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.227
Abstract
WC-Co cemented carbide has excellent mechanical properties and is widely used in many industrial applications including cold forging die and cutting tools. WC-Co cemented carbide is manufactured by liquid phase sintering (LPS), and a new sintering process for densification has been developed. In this study, cylindrical rod shaped tensile and.....
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Web of Science 2
Crossref 3
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Korean J. Met. Mater.
2021;59(9):640-651. Published online 2021 Aug 4
DOI:
https://doi.org/10.3365/KJMM.2021.59.9.640
Abstract
The paper provides experimental details of the welding and specific examples of welding aluminum welding battery cans and conductive tabs for battery pack manufacture. In this study, we provide experimental details of a process for joining dissimilar materials used in sealing battery parts. A laser brazing technique was used for.....
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CaO 첨가 AZ31 압출재의 개량된 미세조직이 인장, 고주기 피로 및 피로 균열 전파 특성에 미치는 영향
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김영균, 김민종, 황유진, 김세광, 임현규, 이기안
Korean J. Met. Mater.
2021;59(6):365-373. Published online 2021 May 26
DOI:
https://doi.org/10.3365/KJMM.2021.59.6.365
Abstract
The effect of tailored microstructures in 0.5 wt% CaO added AZ31 on tensile, high-cycle fatigue, and fatigue crack growth properties was examined. By adding CaO, the average grain size (AGS) was significantly reduced from 4.25±2.32 μm (conventional AZ31) to 2.42±1.60 μm (CaO-AZ31). The fineprecipitates of CaO-AZ31 were more evenly distributed.....
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Web of Science 2
Crossref 1
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WC-12~22wt%Co 초경합금에서 미세조직 인자가 인장 성질에 미치는 영향
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류성현, 김경일, 노우람, 김상섭, 조규섭
Korean J. Met. Mater.
2021;59(3):201-208. Published online 2021 Feb 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.3.201
Abstract
Cemented carbide is a kind of composite material in which fine particles of carbide are embedded into the matrix of a binder metal. It has a long service life because of its superior mechanical properties. In this study, the overall tensile behavior of a cemented carbide, WC-Co, was investigated by.....
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Web of Science 3
Crossref 3
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저온 분사 공정으로 제조된 초고강도 Cu 벌크 소재의 인장 및 압축 변형 거동
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김영균, 이기안
Korean J. Met. Mater.
2020;58(11):759-767. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.759
Abstract
In this study, high-strength pure Cu bulk material was manufactured using a cold spray additive manufacturing process, and its microstructure, tensile and compressive deformation behaviors were investigated and compared. The cold spray additive manufactured Cu bulk material showed a heterogeneous grain structure consisting of fine-grains and coarse-grains, and only α.....
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Web of Science 1
Crossref 1
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랜덤 트리 성장을 이용한 소성 경화 모델 개발방법 및 새로운 모델 제안
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손형서, 김영곤, 김진재, 김영석
Korean J. Met. Mater.
2020;58(11):741-751. Published online 2020 Oct 21
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.741
Abstract
The flow functions for plastic deformation have been developed to describe the plastic behavior of sheet metals. In order to explain the plastic behavior of material in metal forming processes via finite element analyses, two basic input functions should be applied. One is the yield function that determines the yielding.....
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분말 합금법으로 제조된 Ni-Cr-Al 초합금 다공체의 인장 특성에 미치는 변형률 속도 및 하중 방향 효과
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김규식, 배정석, 오재성, 이기안
Korean J. Met. Mater.
2020;58(6):375-382. Published online 2020 May 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.6.375
Abstract
The powder-alloyed metallic sheet foam manufacturing process has the advantage of being able to control pore shape, size, and distribution more easily and homogeneously than conventional foam manufacturing processes. The effects of strain rate and tensile direction on the mechanical properties of Ni-Cr-Al superalloy foam fabricated by powder alloying method.....
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Web of Science 1
Crossref 1
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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
Crossref 4
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레이저로 적층 제조된 STS316L에 대한 직접에너지적층 응용 보수 시 공정 중 후열처리(In-Situ Post Heating) 효과
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오욱진, 손용, 심도식
Korean J. Met. Mater.
2019;57(8):543-553. Published online 2019 Jul 11
DOI:
https://doi.org/10.3365/KJMM.2019.57.8.543
Abstract
The repairing parts were fabricated by PBF (powder bed fusion) using direct energy deposition (DED), interfacial cracks can occur at the interface between the substrate and the area to be repaired. Such interfacial defects are due to the thermal stress induced by the temperature gradient which results from repeated melting.....
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Web of Science 5
Crossref 5
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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
6
. Nitrogen was reduced from 0.04 to.....
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Web of Science 1
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변형률 속도에 따른 AZ31 Mg 합금의 집합조직 및 전위 거동 관찰
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이동기, 권준범, 이현종, 조수미, 임영목, 양원존, 김양도
Korean J. Met. Mater.
2019;57(5):279-288. Published online 2019 May 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.5.279
Abstract
This study is concerned with the influence of strain rate on the plastic deformation behavior and microstructure variables of AZ31 magnesium alloy sheet. The tensile properties were measured at room temperature at a strain rate of 0.001 and 100 s–1 using a universal tensile testing machine and servo-hydraulic high-speed tensile.....
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Web of Science 3
Crossref 3
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AISI 1045 강의 인장 및 고주기 피로 특성에 미치는 Cr 도금층 두께의 영향
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함기수, 강연지, 김형준, 윤상훈, 이기안
Korean J. Met. Mater.
2019;57(3):138-145. Published online 2019 Feb 14
DOI:
https://doi.org/10.3365/KJMM.2019.57.3.138
Abstract
This study investigated and compared the tensile and high-cycle fatigue properties of AISI 1045 steel and Cr electroplated AISI 1045 steel. First, tensile and fatigue specimens were machined from AISI 1045 steel (substrate), and two kinds of Cr electroplating layers with different layer thickness were applied. The substrate, AISI 1045.....
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Web of Science 3
Crossref 3
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피로손상된 제진합금의 인장성질에 미치는 피로응력 크기의 영향
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이명수, 김권후, 강창룡
Korean J. Met. Mater.
2019;57(2):71-76. Published online 2019 Jan 8
DOI:
https://doi.org/10.3365/KJMM.2019.57.2.71
Abstract
This study was carried out to investigate the effect of fatigue stress magnitude on the tensile properties of the damaged Fe – 22Mn – 12Cr – 3Ni – 2Si – 4Co damping alloy under various fatigue stress magnitudes. α´ and ε-martensite were formed by fatigue stress in the Fe –.....
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Crossref 1
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Metal Injection Molding 공정으로 제조된 W-7Ni-3Fe 텅스텐 중합금의 미세조직 및 기계적 특성에 미치는 열처리의 영향
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윤성준, 주연아, 윤태식, 이기안
Korean J. Met. Mater.
2018;56(10):727-733. Published online 2018 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.10.727
Abstract
This study investigated the microstructure and room temperature mechanical properties of W-7Ni-3Fe (wt%) tungsten heavy alloy (as-fabricated) which was manufactured by metal injection molding (MIM). To identify the effect of heat treatment on the W-7Ni-3Fe alloy, its properties were compared after heattreatment (1,100 oC for 1 hour) in vacuum atmosphere......
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Crossref 1
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AZ80과 TAZ711 마그네슘 압출재의 상온 및 고온 인장 특성과 고주기 피로 특성
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이상원, 김상훈, 박성혁
Korean J. Met. Mater.
2018;56(10):699-707. Published online 2018 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.10.699
Abstract
The microstructure, tensile properties at room and elevated temperatures, and high-cycle fatigue behavior of an extruded Mg-7Sn-1Al-1Zn (TAZ711) alloy were investigated in comparison with those of an Mg-8Al-0.5Zn (AZ80) alloy extruded under the same conditions. The extruded AZ80 alloy exhibited a fully recrystallized structure, whereas the extruded TAZ711 alloy had.....
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Crossref 3
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Korean J. Met. Mater.
2018;56(9):664-673. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.664
Abstract
This study examined the influence of nanosized aluminum nitride (AlN) powders (0, 0.01, 0.05, 0.10, 0.30, and 0.50 wt%), on an Al4047-based filler metal. Nanosized AlN powders were dispersed uniformly into the filler metal by a mechanical mixing and melting route using a stainless steel propeller. The influences of nanosized.....
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Crossref 1
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단 범위 규칙 반응이 Zr-2.5%Nb 압력관 재료의 시효(aging) 현상에 미치는 영향
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김성수, 김영석, 정종엽
Korean J. Met. Mater.
2018;56(7):479-489. Published online 2018 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.7.479
Abstract
This study was conducted to investigate the effect of aging treatment from 300 °C to 420 °C on the mechanical properties of the pressure tube material at 310 °C, which is outlet temperature pressure tube in CANDU reactor. The short range ordering (SRO) phenomenon during aging process is confirmed by.....
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Crossref 3
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Powder Injection Molding 공정으로 제조된 17-4PH 강과 Fe-Cr-B 합금 복합 소재의 미세조직 및 기계적 특성
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주연아, 김영균, 윤태식, 이기안
Korean J. Met. Mater.
2018;56(5):342-349. Published online 2018 May 8
DOI:
https://doi.org/10.3365/KJMM.2018.56.5.342
Abstract
This study investigated the microstructure and mechanical properties of 17-4PH precipitation hardened martensite stainless steel and Fe-Cr-B based alloy mixed material manufactured using powder injection molding. 17-4PH stainless steel powder was mixed with 5 wt%, 10 wt% and 20 wt% Fe-Cr-B based alloy (M alloy) powder to manufacture three different.....
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Crossref 5
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열처리 및 열 사이클 조건에 따른 전해 Cr/전해 Ni-P 도금의 접합강도 평가 및 계면분석
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이진아, 손기락, 최명희, 이규환, 박영배
Korean J. Met. Mater.
2018;56(4):280-288. Published online 2018 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.4.280
Abstract
The effects of heat treatment and thermal cycle conditions on the bonding strength and interfacial characteristics of electroplated Cr/electroplated Ni-P coatings were systematically evaluated. With step1 samples, heat treatment was performed at 750
o
C for 6 hours after successive electroplating of Ni-P and Cr layers. With step2 samples, 1st heat.....
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