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Volume 54(10); Oct 2016
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Research Papers
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
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/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

723 Effect of Added Magneisum on the Coating Properties of Galvanized Steel Sheets
용융아연 도금특성에 미치는 Mg 미량첨가 영향
Moon-Hi Hong, Deok-Gu Kang, Doo-Jin Paik, Hyeon-Seok Hwang, Sung-ho Park
홍문희, 강덕구, 백두진, 황현석, 박성호
Korean J. Met. Mater. 2016;54(10):723-731.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.723

The effect of a small amount of added Mg on the microstructure, Fe-Al inhibition layer, corrosion resistance and welding properties of hot-dip galvanized and galvannealed steel sheets were investigated. Both the microstructure and distribution of Mg were measured by scanning electron microscopy, transmission electron microscopy, glow discharge spectrometer and electron..... More

732 Experimental and Simulation Analysis of Hot Isostatic Pressing of Gas Atomized Stainless Steel 316L Powder Compacts
Dongguo Lin, Sangyul Ha, Youngho Shin, Dong Yong Park, Seong Jin Park, Sung Taek Chung, Ravi Bollina, Seongkyu See
Korean J. Met. Mater. 2016;54(10):732-742.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.732

In this work, both experimental and numerical studies were conducted to investigate the densification behavior of stainless steel 316L (STS 316L) powders during hot isostatic pressing (HIP), and to characterize the mechanical properties of HIPed specimens. The HIP experiments were conducted with gas atomized STS 316L powders with spherical particle..... More

743 Carbothermal Reduction of Oxide of WC/Co Hardmetal Scrap
WC/Co 초경 스크랩 산화물의 환원/침탄 반응
CheolMin Kwon, Gil-Geun Lee, Gook-Hyun Ha
권철민, 이길근, 하국현
Korean J. Met. Mater. 2016;54(10):743-751.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.743

This study conducted an analysis of the carbothermal reduction of oxidized WC/Co hardmetal scrap with solid carbon under an argon and hydrogen gas atmosphere. The WC/Co hardmetal scrap oxide consisted of WO3 and CoWO4. WO3 was reduced before CoWO4 by the solid carbon regardless of gas atmosphere. The simple oxide..... More

752 Synthesis and Sintering Behavior of Cordierite Prepared from Multi-Component Materials Including Alkaline-Earth Minerals
다성분 원료를 사용한 코디어라이트 내열재료 제조 및 알칼리계 원료 첨가 효과
Suk-In Jeong, Nam-Il Kim, Sang-Jin Lee
정숙인, 김남일, 이상진
Korean J. Met. Mater. 2016;54(10):752-758.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.752

Cordierite was synthesized using multi-component materials based on a talc-alumina-clay system. The cordierite sintered at 1360 °C showed a high relative density of 98.8% and a low thermal expansion coefficient of 1.59×10-6/°C. To study the effect of adding alkaline-earth minerals on the cordierite properties, petalite, potash-feldspar, and dicalcium phosphate were..... More

759 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 Shin
한승엽, 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

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

768 Effect of HCl Concentration on the Oxidation of LIX 63 and the Subsequent Separation of Pd(II), Pt(IV), Ir(IV) and Rh(III) by Solvent Extraction
Thi Hong Nguyen, Man Seung Lee
Korean J. Met. Mater. 2016;54(10):768-774.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.768

During the selective extraction of Pd(II) by LIX 63 from 6 M HCl solutions containing platinum group metals, an oxidation-reduction reaction occurs between the LIX 63 and Ir(IV). Since the reduced Ir(III) cannot be extracted by solvating and amine extractants, the oxidation-reduction reaction has a significant effect on the separation..... More

775 Effect of Post-Deposition Annealing on the Structural, Optical and Electrical Properties of Ti-doped Indium Oxide Thin Films
Sung-Bo Heo, Hyun-Joo Moon, Jeong-Hyeon Oh, Young-Hwan Song, Tae-Young Eom, Jun-Ho Kim, Daeil Kim
Korean J. Met. Mater. 2016;54(10):775-779.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.775

Ti-doped In2O3 (TIO) thin films were deposited on glass substrates by RF magnetron sputtering. The films were then annealed at 100, 200 or 300 °C for 30 min to investigate the effects of the annealing temperature on the films’ structural, electrical and optical properties. The films annealed at 200 °C..... More

780 Fabrication of Si/SiOx Anode Materials by a Solution Reaction-Based Method for Lithium Ion Batteries
Hyeon-Woo Yang, Jung-Ho Lee, Sang-Chul Jung, Seung-Taek Myung, Woo-Seung Kang, Sun-Jae Kim
Korean J. Met. Mater. 2016;54(10):780-786.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.780

Si/SiOx composite anodes were prepared using a facile solution reaction-based method. Their initial capacity was significantly improved to 1.3 times that of SiOx by incorporating 3 wt% silicon nanoparticles into the SiOx. The capacity retention of the Si/SiOx anodes after 50 charge-discharge cycles was significantly enhanced, to 99%, compared with..... More

787 Catalytic Activity and Surface Characteristics of WO3-doped MnOx-TiO2 Catalysts for Low-temperature Selective Catalytic Reduction of NOx with NH3
Byeongkil Shin, Heesoo Lee, Hyun Park
Korean J. Met. Mater. 2016;54(10):787-792.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.787
The effect of added WO3 on the catalytic activity and surface characteristics of the MnOx-TiO2 system was investigated for the low-temperature selective catalytic reduction of NOx with NH3. Based on physio-chemical characterizations, the specific surface areas of the WO3-MnOx-TiO2 catalysts increased from 76.12 m2/g to 90.29 m2/g as the WO3... More
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