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Volume 56(6); Jun 2018
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Research Papers
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
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

423 Microstructure and Room Temperature Wear Properties of a Ni-Cr-B-Si-C Coating Layer Manufactured by the Laser Cladding Process
Laser Cladding 공정으로 제조된 Ni-Cr-B-Si-C 코팅층의 미세조직 및 상온 마모 특성
Tae-Hoon Kang, Kyu-Sik Kim, Soon-Hong Park, Kee-Ahn Lee
강태훈, 김규식, 박순홍, 이기안
Korean J. Met. Mater. 2018;56(6):423-429.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.423

A Ni-Cr-B-Si-C coating layer was manufactured on a plate of Fe base alloy using a laser cladding process, and the microstructural and mechanical properties of the laser cladded coating layer and a Ni electroplating layer (used as a reference material) were investigated. To identify the microstructural and mechanical properties, scanning..... More

430 A Study on Micro-Structure and Wear Behavior of AISI M4 and CPM15V Deposited by Laser Melting
레이저 용융 적층 기술을 이용한 AISI M4와 CPM15V 분말 적층부의 미세 조직 및 마모 특성에 관한 연구
Gyeong Yun Baek, Gwang Yong Shin, Ki Yong Lee, Do Sik Shim
백경윤, 신광용, 이기용, 심도식
Korean J. Met. Mater. 2018;56(6):430-439.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.430

AISI M4 and CPM15V are used as tool steels since they have high hardness and wear resistance. This study is concerned with die and mold hardfacing using laser melting deposition with M4 and CPM15V powders. For this purpose, the two types of metal powders were deposited on SKD11 base metal,..... More

440 Liquid-Phase Reaction Sintering Behavior at below 200 °C and Electrical Sheet Resistance of Sn-58Bi/Cu Composite Pastes
Sn-58Bi/Cu 복합 페이스트의 200 °C 미만 액상 반응 소결 거동과 전기저항 변화
Jun Ho Hwang, Dongshin Jeong, Jong-Hyun Lee
황준호, 정동신, 이종현
Korean J. Met. Mater. 2018;56(6):440-448.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.440

To fabricate a film with the highest electrical conductivity through liquid-phase reaction sintering below 200 °C using composite pastes containing both Sn-58Bi and Cu particles as a filler material, the effects of process parameters, such as the mixing ratio of the fillers, reaction temperature, and reaction time, were evaluated and..... More

449 Effect of Via Pitch on the Extrusion Behavior of Cu-filled TSV
Seho Kee, Wonjoong Kim, Jaepil Jung, Minhyung Choi
Korean J. Met. Mater. 2018;56(6):449-458.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.449

In this study, the extrusion behavior of Cu fill material in a through-Si-via (TSV) subjected to thermal loading was investigated. The Cu filling of the TSV was accomplished using pulse periodic reverse (PPR) electroplating. To study the extrusion, TSVs of varying via pitch were filled with Cu by electroplating. Defect-free Cu..... More

459 Main Effects of Plating Parameters on Mechanical and Surface Properties of Electroplated Copper
구리 전해도금 변수의 기계적 특성 및 표면 특성에 미치는 주 효과 분석
Tae-Gyu Woo, Il-Song Park, Kyeong-Won Seol
우태규, 박일송, 설경원
Korean J. Met. Mater. 2018;56(6):459-464.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.459

Electroplated copper has been used as wiring in electronic circuit boards and as cathode materials for secondary batteries, and its usage has expanded into the construction industry because of its convenient production and high economic value. During the electroplating process, various parameters, such as crystal phase and size, can affect..... More

465 Thermoelectric Properties of Partially Double-filled (Ce1-zNdz)yFe4-xCoxSb12 Skutterudites
Ye-Eun Cha, Il-Ho Kim*
Korean J. Met. Mater. 2018;56(6):465-471.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.465

(Ce1-zNdz)yFe4-xCoxSb12 skutterudites were prepared by encapsulated melting, annealing, and hot pressing. The formation of a marcasite phase (FeSb2) was significantly suppressed by partially filling the voids with Ce/Nd and making a Co substitution at the Fe site. Both the Hall and the Seebeck coefficient values were positive, indicating that all..... More

472 Phase-field Modeling of Precipitate Behavior in RPV Steel Using CALPHAD Database
Kunok Chang, Junhyun Kwon, Gyeong-Geun Lee
Korean J. Met. Mater. 2018;56(6):472-478.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.472

We developed a multi-scale modeling framework using the thermodynamic UW1 database of the Fe-Mn-Ni-Si quaternary system. To obtain input data for the phase-field model, such as mobility and interfacial energy data, we used DICTRA software and the TC-PRISMA package with the commercial TCFE8 and MOBFE3 databases. Using the developed framework,..... More

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