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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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> Browse Articles > Search
Effect of Configurational Entropy of Mixing on Thermophysical Properties in Single Phase FCC Solid Solutions with Multi-Principal Elements
혼합엔트로피 제어에 따른 단일 FCC 고용체 합금의 물성변화 분석
Je In Lee, Hyun Seok Oh, Jun Hyuk Kim, Eun Soo Park이제인, 오현석, 김준혁, 박은수
Korean J. Met. Mater.
2017;55(1):1-9. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.1
Abstract
In the present study, we systematically investigated the effect of entropy of mixing (Δ
S
mix
) on the mechanical and thermal properties of single phase FCC solid solutions with multi-principal elements. An increase in Δ
S
mix
led to an increase in micro-hardness and a decrease in thermal conductivity (κ) due to severe lattice.....
More
Crossref 8
Effect of Aging Time and Temperature on Microstructure and Mechanical Properties of Ti-39Nb-6Zr Alloy
Ti-39Nb-6Zr 합금의 시효처리를 통한 미세조직 및 기계적 특성 제어
Hyun Jun Kwon, Ka Ram Lim, Yong Tae Lee, Dong Geun Lee, Jun Hee Lee, Seung Eon Kim권현준, 임가람, 이용태, 이동근, 이준희, 김승언
Korean J. Met. Mater.
2016;54(12):925-930. Published online 2016 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.12.925
Abstract
The aim of this study is to optimize the microstructure and mechanical properties of Ti-39Nb-6Zr (TNZ40) for bio-implant applications. TNZ40 was designed to have a low elastic modulus (~40 GPa) and good biocompatibility. However, the alloy shows relatively low strength compared to other titanium alloys for bio-implant. In the present.....
More
Crossref 5
Hydrogen Sorption of Pure Mg and Niobium (V) Fluoride-Added Mg Alloys Prepared by Planetary Ball Milling in Hydrogen
Hye Ryoung Park, Young Jun Kwak, Seong Ho Lee, Myoung Youp Song
Korean J. Met. Mater.
2016;54(12):916-924. Published online 2016 Dec 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.12.916
Abstract
In this work, niobium (V) fluoride was selected as an additive to heighten the hydrogen sorption rates of Mg. Specimens of pure Mg, 5 wt% niobium fluoride－added Mg, and 10 wt% niobium fluoride-added Mg were prepared by planetary ball milling in hydrogen. The hydrogen sorption properties of the specimens were.....
More
Crossref 5
The Effects of Cooling Rate on the Microstructure and Mechanical Properties of Ti
40
Zr
10
Cu
36
Pd
14
Metallic Glass Matrix Composites
Ti
40
Zr
10
Cu
36
Pd
14
비정질기지 복합재의 미세조직과 기계적 특성에 미치는 냉각속도의 영향
Seon Yong Park, Ka Ram Lim, Young Sang Na, Seong Eon Kim, Youn Suk Choi박선용, 임가람, 나영상, 김승언, 최윤석
Korean J. Met. Mater.
2016;54(11):802-807. Published online 2016 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.11.802
Abstract
In this paper, we demonstrate that the microstructure and mechanical properties in the Ti
40
Zr
10
Cu
36
Pd
14
alloy can be tailored by controlling the cooling rate during solidification. A lower cooling rate increases the volume fraction of crystalline phase such as B2 but decreases the free volume of the glassy matrix. The increase.....
More
Effect of Cold Drawing and Heat Treatment on the Microstructure of Invar36 Alloy Wire
Invar 36 합금 선재의 미세조직에 미치는 냉간 인발 및 열처리 공정의 영향
Seung Youb Han, Seon Ah Jang, Hee-Chul Eun, Jung-Hoon Choi, Ki Rak Lee, Hwan Seo Park, Do-Hee Ahn, Soo Young Kim, Jea Youl Kim, Sang Yong Shin한승엽, 장선아, 은희철, 최정훈, 이기락, 박환서, 안도희, 김수영, 김재열, 신상용
Korean J. Met. Mater.
2016;54(10):759-767. Published online 2016 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.10.759
Abstract
In this study, the effect of cold drawing and heat treatment on the microstructure of Invar36 alloy wire was investigated. Invar36 alloy wire is used as a transmission line core material, and is required to have high strength. The diameter of the Invar36 alloy wire specimens were reduced from 16.....
More
Crossref 2
Materials Analysis & Characterization
Serial Sectioning and Reconstruction Techniques for Three-Dimensional Microscopy of Metallic Materials
금속 미세조직의 3차원 이미지 관찰을 위한 순차적 박리 및 재구성 기술
Su-Hyeon Kim, Youngmok Rhyim김수현, 임영목
Korean J. Met. Mater.
2016;54(9):698-710. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.698
Abstract
Experimental techniques for serial sectioning and reconstruction were investigated in the three-dimensional imaging of microstructures in metallic materials. Mechanical polishing equipped with a light optical microscope and a digital image processor was used for the serial sectioning and reconstruction. Different processing conditions were investigated for three different alloys: Al-Si alloy,.....
More
Crossref 4
Casting/Solidification/Heat Treatment
Study on the Surface Microstructure of a Modified STD61 Steel Mold Used for the Die Casting Process
다이캐스팅 공정에 사용된 개량형 STD61 열간 금형 표면의 미세조직에 관한 연구
Ha-Young Yu, Seung-Joon Lee, Minwoo Kang, Suk-Jin Lee, Won Jon Yang, Jae Suk Jeong, Byung-Hoon Kim, Young-Kook Lee유하영, 이승준, 강민우, 이석진, 양원존, 정재석, 김병훈, 이영국
Korean J. Met. Mater.
2016;54(9):672-680. Published online 2016 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.9.672
Abstract
The surface microstructure and crack formation of an aluminum die-casting mold were investigated. The mold was made of a modified STD61 steel, and was used for more than 165,000 cycles. The mold surface consisted of four layers; an oxidized layer, a decarburized layer, a network carbide layer and a tempered...
More
Microstructure and Mechanical Properties of Inconel 625 Alloy on Low Carbon Steel by Heat Treatment after Overlay Welding
저합금강의 인코넬 625 육성용접 후 열처리에 따른 미세조직 및 기계적 특성
Seungpil Kim, Jaeho Jang, Jungsoo Kim, Byung Jun Kim, Keun Yong Sohn, Dae-Geun Nam김승필, 장재호, 김정수, 김병준, 손근용, 남대근
Korean J. Met. Mater.
2016;54(8):585-591. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.585
Abstract
Overlay welding technique is one of methods used to improve metal mechanical properties such as strength, toughness and corrosion resistance. Generally, Inconel 625 alloy is used for overlay welding layer on low carbon steels for economic consideration. However, the method produces some problems in the microstructure of the cast structure...
More
Crossref 2
Powder Metallurgy
Microstructure Changes of ZrO
2
/W/Mo Coating Layers on Graphite after Heat Treatment at 2100 ℃
용사 코팅한 ZrO
2
/W/Mo-Graphite 코팅층의 2100 ℃ 열처리 후 미세조직 변화에 관한 연구
Gyu Baek Ahn, Kyeong Hwan Choe, Sang Sub Kim, Gue Serb Cho안규백, 최경환, 김상섭, 조규섭
Korean J. Met. Mater.
2016;54(8):559-565. Published online 2016 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.8.559
Abstract
A tungsten coating was deposited onto a graphite substrate using the atmospheric plasma spraying (APS) technique. In order to increase the adhesion strength between the metallic tungsten(W) and graphite, a molybdenum (Mo) interlayer was pre-deposited onto the graphite surface by utilizing the APS technique. Also, after deposition of a APS-W.....
More
Crossref 4
Microstructure and Mechanical Properties of Continuous Welded 50N Rail
Wookjin Choi1, Min Ji Song1, Nam-Hyoung Lim2, and Soo Yeol Lee1,*
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to...
More
Microstructure and Mechanical Properties of Continuous Welded 50N Rail
Wookjin Choi1, Min Ji Song1, Nam-Hyoung Lim2, and Soo Yeol Lee1,*
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to...
More
Microstructure and Mechanical Properties of Continuous Welded 50N Rail
Wookjin Choi1, Min Ji Song1, Nam-Hyoung Lim2, and Soo Yeol Lee1,*
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured headhardened rail, and worn (used) rail) were compared to examine the effects...
More
Microstructure and Mechanical Properties of Continuous Welded 50N Rail
Wookjin Choi, Min Ji Song, Nam-Hyoung Lim, Soo Yeol Lee
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured head-hardened rail, and worn (used) rail) were compared to...
More
Microstructure and Mechanical Properties of Continuous Welded 50N Rail
Published online 1999 Nov 30
Abstract
Rails are subjected to repeated stresses due to wheel-rail contact during train service. Rails under stress conditions undergo microstructural changes, and these cause degradations of the structural integrity and lifetime of rails. In this study, three different rails (newly-manufactured rail, newly-manufactured head-hardened rail, and worn (used) rail) were compared to...
More
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