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1 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
( 2631 times )
Je In Lee, Hyun Seok Oh, Jun Hyuk Kim, Eun Soo Park
이제인, 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

In the present study, we systematically investigated the effect of entropy of mixing (ΔSmix) on the mechanical and thermal properties of single phase FCC solid solutions with multi-principal elements. An increase in ΔSmix led to an increase in micro-hardness and a decrease in thermal conductivity (κ) due to severe lattice..... More

         Cited By 3
202 Simulation and Experimental Study on the Steady Conduction Solution for Continuous Rheo-Casting for A356 Alloy
( 2215 times )
Do Minh Duc, Nguyen Hong Hai, Pham Quang
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

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..... More

Material Analysis & Characterization
621 Study of Water Resistance of Fe2O3 Doped P2O5–ZnO–Bi2O3 Sealing Glass System
( 2173 times )
Moon Kyung Hwang, Il Gu Kim, Bong Ki Ryu
Korean J. Met. Mater. 2016;54(8):621-625.   Published online 2016 Aug 5
DOI: https://doi.org/10.3365/KJMM.2016.54.8.621

In order to strengthen the structure of the glass and ultimately improve its water resistance, P2O5–ZnO–Bi2O3 was doped with Fe2O3, which generated Fe ions in the phosphate-based glass. These ions constitute (P2O7)−4 groups within the glass network. Structural analysis using Fourier transfer infrared spectroscopy indicated that P-O-P and Bi-O-P bonds..... More

296 Factors Influencing Plasma Electrolytic Oxidation(PEO) Coatings on Magnesium Alloys: A Review
마그네슘 합금의 플라스마전해산화 코팅에 영향을 미치는 제반 요소들에 대한 고찰
( 2162 times )
Gunchoo Shim
Korean J. Met. Mater. 2017;55(5):296-307.   Published online 2017 May 9
DOI: https://doi.org/10.3365/KJMM.2017.55.5.296
Magnesium alloys, which possess excellent specific strength and castability, are highly susceptible to corrosion. Although anodizing is widely used to resolve this problem, it requires toxic electrolytes and produces relatively thin and weak surface coatings. Recently, plasma electrolytic oxidation (PEO) has emerged as an alternative to anodizing. Although it is... More
         Cited By 2
716 Effect of Second Aging Treatment on the Microstructure and Mechanical Properties of SUH660 Alloy
SUH660합금의 미세조직 및 기계적 특성에 미치는 2차 시효 열처리의 영향
( 1969 times )
Do-Hoon Kim, You-Hwan Lee, Jeoung Han Kim
김도훈, 이유환, 김정한
Korean J. Met. Mater. 2016;54(10):716-722.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.716

nSUH660 is a precipitation hardening stainless steel which has high strength at moderately high temperature. In this study, the effect of a secondary aging-treatment after the standard 720 °C heat-treatment was investigated. The Rockwell C hardness test with detailed TEM observerations was performed to study the steel’s hardening mechanism. The..... More

         Cited By 1
846 Effect of Basicity on the Reduction Behavior of Carbon Composite Iron Oxide Briquette
탄재내장 산화철 브리켓의 환원거동에 미치는 염기도 영향
( 1885 times )
Jae-Hong Kwon, Eui-Hyuk Kwon, Ki-Woo Lee, Kang-Min Kim, Ji-A Lee, Jeong-Whan Han
권재홍, 권의혁, 이기우, 김강민, 이지아, 한정환
Korean J. Met. Mater. 2016;54(11):846-854.   Published online 2016 Nov 5
DOI: https://doi.org/10.3365/KJMM.2016.54.11.846

The world is gradually running short of high quality iron resources. This forces ironmaking processes to focus on the use of low quality iron ores. Carbon composite iron oxide briquettes (CCB) are one of the alternative choices. CCB enables the utilization of low quality powdered iron ores and coal, and..... More

413 Correlation of Microstructural Factors with the Yield Ratio and Uniform Elongation in API X80 Linepipe Steels
API X80 라인파이프강의 미세조직적 인자와 항복비 및 균일 연신율의 상관관계
( 1841 times )
Sang-In Lee, Seung-Wan Lee, Seok Gyu Lee, Sunghak Lee, Hwan Gyo Jung, Byoungchul Hwang
이상인, 이승완, 이석규, 이성학, 정환교, 황병철
Korean J. Met. Mater. 2018;56(6):413-422.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.413

In the present study, the correlation of microstructural factors with yield ratio and uniform elongation was investigated in API X80 linepipe steels with different microstructures by varying thermomechanical control process conditions. The grain size and microstructure fraction of the API X80 linepipe steels were quantitatively measured by EBSD analysis and then..... More

862 Technical Developments and Trends of Earthquake Resisting High-Strength Reinforcing Steel Bars
내진용 고강도 철근의 제조와 기술 개발 동향
( 1745 times )
Byoungchul Hwang, Jae-Hyeok Shim, Myoung-Gyu Lee, Joonho Lee, Jun-Ho Jung, Bo-Sung Kim, Sung-Bin Won
황병철, 심재혁, 이명규, 이준호, 정준호, 김보성, 원성빈
Korean J. Met. Mater. 2016;54(12):862-874.   Published online 2016 Dec 5
DOI: https://doi.org/10.3365/KJMM.2016.54.12.862

Since reconstruction of old town in Korea requires high-rise and seismic design construction, many attentions have been paid to high strength seismic reinforced steel bar. In the present paper, technical developments and trends are summarized for developing next-generation seismic reinforced steel bar of grade 700 MPa. Steelmaking process requires high..... More

         Cited By 1
908 Kinetics of Intermetallic Compounds Growth Induced by Electromigration of Sn-0.7Cu Solder
Electromigration에 의한 Sn-0.7Cu 솔더 금속간화합물 성장 예측
( 1737 times )
Min-Hyeok Heo, Namhyun Kang, Seonghun Park, Jun-Ki Kim, Won Sik Hong
허민혁, 강남현, 박성훈, 김준기, 홍원식
Korean J. Met. Mater. 2016;54(12):908-915.   Published online 2016 Dec 5
DOI: https://doi.org/10.3365/KJMM.2016.54.12.908

The reliability of printed circuit boards (PCB) has emerged as a critical concern as the size of solder bump decreases and current density to solder bump increases by fine pitch formation. The main failure mode of solder bumps is open-circuits due to void formation as intermetallic compounds (IMC) grow, mainly..... More

         Cited By 1
77 Mechanical Properties of Discontinuous Precipitated Al-Zn Alloys after Drawing at Room and Cryogenic Temperatures
불연속 석출된 Al-Zn 합금의 상온 및 극저온 인발에 따른 미세조직 변화가 기계적 특성에 미치는 영향
( 1735 times )
Min Soo Kim, Seung Zeon Han, Jehyun Lee, Sung Hwan Lim, Jee Hyuk Ahn, Sang-Shik Kim, Kwang Ho Kim
김민수, 한승전, 이재현, 임성환, 안지혁, 김상식, 김광호
Korean J. Met. Mater. 2017;55(2):77-84.   Published online 2017 Feb 2
DOI: https://doi.org/10.3365/KJMM.2017.55.2.77

In order to study the effect of microstructural change on the tensile properties of discontinuous precipitated Al-Zn binary alloy, four different Al-Zn alloys(25, 30, 35, 45 wt% Zn) were aged at 160 ℃ for different aging times(0, 5, 15, 30, 60, 120, 360 min) after being solution treated at 400..... More

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