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Table of Contents | February, 2018  Vol. 56   No.2 Previous Issue | Next Issue | Archive
In this issue:

79 A Review of Factors Influencing the Hydride Reorientation Phenomena in Zirconium Alloy Cladding During Long-Term Dry Storage
장기 건식저장 사용후핵연료 지르코늄 합금 피복관 내 수소화물 재배열 현상 영향 인자들에 대한 고찰
Ji-Min Lee, Ho-A Kim, Dong-Hak Kook, Yong-Soo Kim
이지민, 김호아, 국동학, 김용수
Korean J. Met. Mater. 2018;56(2):79-92.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.79

Abstract
Zirconium-based alloys, widely used for nuclear fuel cladding, are highly susceptible to hydrideinduced embrittlement. The degree of the hydride embrittlement is strongly affected by not only its concentration but also its morphology. The hydride can drastically reduce the mechanical properties of the cladding, especially when it is radially precipitated. Recently..... More

      
93 Formation Behavior of δ Ferrite Within LB and GTA Weld Zones of Mod. 9Cr-1Mo Steel in Terms of Thermal History
Mod. 9Cr-1Mo강 LB 및 GTA 용접부 열이력에 따른 δ 페라이트 생성거동
Nam-hun Jung, Jang-ho Ahn, Myung-jin Lee, Nam-hyun Kang, Kyung-Mox Cho
정남훈, 안장호, 이명진, 강남현, 조경목
Korean J. Met. Mater. 2018;56(2):93-102.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.93

Abstract
The toughness and creep strength of Mod. 9Cr-1Mo steel, a ferritic heat resistant steel, are closely related to the amount of delta ferrite remaining in the weld. This study compared the amount of retained δ ferrite in the laser beam (LB) weld with low heat input and the gas tungsten..... More

      
103 Study on the Part Unit Corrosion Evaluation for Automotive Lower Arm Using Electrochemical Cyclic Corrosion Test
전기화학적 순환부식 시험법을 활용한 자동차 로어암의 단품단위 부식평가에 관한 연구
Seon-Hong Kim, Ji-Hoon Lee, Jung-Gu Kim, Min Jang
김선홍, 이지훈, 김정구, 장민
Korean J. Met. Mater. 2018;56(2):103-112.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.103

Abstract
This research focused on the development of the part unit evaluation for an organic coated automotive lower arm using the electrochemical cyclic corrosion test (E-CCT). The E-CCT accelerates both the coating degradation and the perforation corrosion. The applied potential for the coating degradation was determined to be -500 mVSCE for..... More

      
113 Effects of Feedstock Powder Characteristics on the Microstructural Features and Erosion Resistance of WC-12Co Coatings
분말소재 특성에 따른 고속화염용사 WC-12Co 코팅층의 미세조직 및 침식 저항성
So-Yeong Kang, Kyeong-Ho Baik, Sang-Hoon Yoon, Hyung-Jun Kim
강소영, 백경호, 윤상훈, 김형준
Korean J. Met. Mater. 2018;56(2):113-120.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.113

Abstract
WC-Co coatings manufactured by high velocity oxy-fuel (HVOF) spraying have a superior hardness and wear resistance. In this study, HVOF-sprayed WC-12Co coatings from three different feedstock powders were evaluated in terms of microstructural features, carbide decomposition and erosion resistance. The fused-crushed and the sintered-crushed WC-12Co powders had an angular shape,..... More

      
121 Effect of Hot Isostatic Pressing on the Microstructure and Room·High Temperature Tensile Properties of Fe-Cr-Ni based HK30 Alloy Manufactured by Metal Injection Molding Process
Metal Injection Molding 공정으로 제조된 Fe-Cr-Ni계 HK30 합금의 미세조직 및 상·고온 인장 특성에 미치는 열간 등압 성형의 영향
Young-Kyun Kim, Tae-Sik Yoon, Kee-Ahn Lee
김영균, 윤태식, 이기안
Korean J. Met. Mater. 2018;56(2):121-129.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.121

Abstract
This study manufactured Fe-Cr-Ni-based alloy (HK30) using the metal injection molding (MIM) process and investigated the microstructure and room·high temperature mechanical properties of the material. The effect of hot isostatic pressing (HIP) on properties was also examined. The average grain sizes were 24.1 µm for an MIM specimen and 29.1..... More

      
130 Effect of the Number of Cold Rolling Passes on the Formation of {110}<001> Goss-Oriented Grains in Fe-3.2 wt% Si Electrical Steel
Fe-3.2 wt% Si 방향성 전기강판에서 냉간압연 횟수가 집합조직과 {110}<001> Goss 결정립 형성에 미치는 영향
Soeng-Ho Jeon, No-Jin Park
전성호, 박노진
Korean J. Met. Mater. 2018;56(2):130-136.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.130

Abstract
An excellent grain-oriented electrical steel is composed of grains with exact Goss orientation. In order to produce this, it is important to control the Goss-oriented grains during the cold-rolling process. In this study, textures measured by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) were analyzed for 1, 10, and..... More

      
137 Effects of Welding Consumables on the Solidification Cracking in SAW Weld Metal of Medium Carbon Steel
중탄소강 SAW 용접금속의 응고 균열 발생에 미치는 용접재료의 영향
Kook-soo Bang, Woo-hyun Song, Hong-chul Jung
방국수, 송우현, 정홍철
Korean J. Met. Mater. 2018;56(2):137-145.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.137

Abstract
The effects of submerged-arc welding consumables, wire and flux, on solidification cracking in the weld metal of medium-carbon steel were investigated. It showed that weld metal with a greater amount of C, S, and P had a wider brittleness temperature range, BTR, which resulted in longer total and maximum crack..... More

      
146 Comparison of the Extraction and Separation Behavior of La, Ce, Pr, Nd, Sm from Light Rare Earth Mixed Solutions by PC88A and Cyanex 572
경희토류 혼합용액에서 PC88A와 Cyanex 572에 의한 La, Ce, Pr, Nd, Sm의 추출·분리 거동 비교
Yeon-Chul Cho, Joo-eun Lee, Hong-Il So, Jae-Woo Ahn, Hong-in Kim, Jin-young Lee
조연철, 이주은, 소홍일, 안재우, 김홍인, 이진영
Korean J. Met. Mater. 2018;56(2):146-154.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.146

Abstract
Solvent extraction of La, Ce, Pr, Nd and Sm from chloride solutions was studied using PC88A and Cyanex 572 as the extractants. Our results indicated that the acidity of the aqueous solution and saponification degree had some effect on the percentage extraction of metal ions. The distribution coefficient of the..... More

      
155 Hydrogen Absorption and Release Properties of MgH2, Mg2Ni, and Ni-Added Mg via Reactive Mechanical Grinding
Seong-Hyeon Hong, Myoung Youp Song
Korean J. Met. Mater. 2018;56(2):155-162.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.155

Abstract
In this work, MgH2, Mg2Ni, and Ni were added to Mg in order to improve the hydrogen-storage properties of Mg. A 84 wt% Mg + 10 wt% MgH2 + 5 wt% Mg2Ni + 1 wt% Ni sample (designated the Mg-based sample) was prepared by milling under a hydrogen atmosphere in..... More

      
163 Effects of Interface Control Using Reduced Graphene Oxide (RGO) on the Thermoelectric Transport Properties of Polycrystalline SnSe Compounds
환원 산화 그래핀을 이용한 계면제어가 다결정 SnSe의 열전 수송특성에 미치는 효과
Sang Tae Lee, Young Soo Lim
이상태, 임영수
Korean J. Met. Mater. 2018;56(2):163-169.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.163

Abstract
We report the effects of interface control using reduced graphene oxide (RGO) on the thermoelectric transport properties of polycrystalline SnSe compounds. Polycrystalline SnSe-RGO composites were prepared by the consolidation of SnSe powder coated with the RGO by hot pressing, and the RGO content was controlled to be 0, 0.2, 0.5..... More

      
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