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Table of Contents | January, 2019  Vol. 57   No.1 Previous Issue | Next Issue | Archive
In this issue:



Review Paper
1 Recent Progress in First Principle Calculation and High-Throughput Screening of Electrocatalysts: A Review
전기화학촉매의 제일원리 계산 및 하이스루풋 스크리닝 연구 동향: 리뷰
Changsoo Lee, Kihoon Bang, Doosun Hong, Hyuck Mo Lee
이창수, 방기훈, 홍두선, 이혁모
Korean J. Met. Mater. 2019;57(1):1-9.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.1

Abstract
There are many ongoing efforts to develop sustainable, clean, efficient, and economical pathways to produce renewable energy sources to satisfy worldwide energy demands. Electrochemical conversion processes, such as water splitting, CO2 conversion and N2 electroreduction, have been considered as successful approaches to solve these energy issues. Over the past decade,..... More

                        
Research Papers
10 Effect of Prior Cold Working before Aging on the Precipitation Behavior in a Cu-3.5 wt% Ti Alloy
Cu-3.5 wt% Ti 합금의 석출 거동에 미치는 시효 전 가공의 영향
Minah Jo, Eun-Ae Choi, Jee Hyuk Ahn, Young Guk Son, Kwangho Kim, Jehyun Lee, Satoshi Semboshi, Seung Zeon Han
조민아, 최은애, 안지혁, 손영국, 김광호, 이재현, 사토시 셈보시, 한승전
Korean J. Met. Mater. 2019;57(1):10-17.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.10

Abstract
Cu-Ti alloys were strengthened by Cu4Ti intermetallic compound precipitation in a Cu matrix during aging. The Cu-3.5 wt% Ti(Cu-4.6 at% Ti) alloys without deformation and with uniform and non-uniform deformation were aged at 450 oC for various times after solution treatment at 885 oC. The uniformly and non-uniformly deformed alloys..... More

                        
18 Comparison Between Multi-Axial Forging and Multi-Axial Diagonal Forging of AA1100 Using Finite Element Analysis
유한요소해석을 이용한 AA1100의 다축 단조와 다축대각 단조의 비교
Hyo-Tae Jeong, MinSeong Kim, SangChul Kwon, SunTae Kim, Seong Lee, Shi-Hoon Choi
정효태, 김민성, 권상철, 김순태, 이성, 최시훈
Korean J. Met. Mater. 2019;57(1):18-27.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.18

Abstract
The effect that forging routes (3 routes, A-C) exert on the development of deformation heterogeneity in AA1100 was theoretically performed using finite element analysis. Route A corresponded to a forging process that involved from 1 to 6 passes through multi-axial diagonal forging (MADF); Route B corresponded to a forging process..... More

                        
28 Influence of Boron and Manganese on Hot Crack Resistance and Low Temperature Toughness of Flux Cored Arc Weld Metal for High Strength Carbon Steels
고강도 탄소강 FCA 용착금속의 고온균열 저항성과 저온 충격인성에 미치는 보론과 망간의 영향
Su-Kil Park, Young-Ho Cho, Chun-Ho Jee, Junghoon Lee, Seong-Moon Seo, Namhyun Kang
박수길, 조영호, 지춘호, 이정훈, 서성문, 강남현
Korean J. Met. Mater. 2019;57(1):28-37.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.28

Abstract
The hot crack resistance and mechanical properties of flux cored arc (FCA) welds were investigated with three kinds of welding consumables having different boron (B) and manganese (Mn) contents for high strength carbon steel. The hot crack resistance, measured from self-restraint testing, strongly depended on the amount of B in..... More

                        
38 Domain Wall Motions in a Near-Morphotropic Pb(Zr,Ti)O3 Under Mechanical Stress Observed by In Situ Piezoresponse Force Microscopy
Kwanlae Kim
김관래
Korean J. Met. Mater. 2019;57(1):38-42.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.38

Abstract
Many important material properties of ferroelectric ceramics such as piezoelectric coefficient and hysteresis curve are governed by domain structures and their evolution processes. In the present work, domain wall motions in a near-morphotropic Pb(Zr,Ti)O3 under an external compressive stress were observed using in situ piezoresponse force microscopy (PFM). This specific..... More

                        
43 Analysis of a Slab and Slab Heater Cover in a Compact Endless Cast and Rolling Mill Process Using Finite Element Methods
Jong Won Baek, Joo Won Oh, Jae-Sook Chung, Yong-Seok Cho, Seong Jin Park
백주원, 오주원, 정제숙, 조용석, 박성진
Korean J. Met. Mater. 2019;57(1):43-50.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.43

Abstract
Compact Endless cast and rolling Mill (CEM) processes were developed and used to fabricate steel products such as steel slabs. However, the coiling furnace in this process was very expensive, so a new layout was suggested. As the coiling furnace was removed, the interval among the slab heaters had to..... More

                        
51 Comparison of Microstructure and Residual Stress Affecting Stress Corrosion Cracking Susceptibility of Austenitic Stainless Steel Tubes
오스테나이트 스테인리스강 튜브의 응력부식균열 민감도에 영향을 미치는 미세조직 및 잔류응력 비교
Ho Jung Lee, Seungjin Oh, Hongdeok Kim
이호중, 오승진, 김홍덕
Korean J. Met. Mater. 2019;57(1):51-59.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.51

Abstract
Three 304L austenitic stainless steel feedwater heater (FWH) tubes used in pressurized water reactors (PWRs) were investigated in this study. By comparing metallurgical differences, such as microstructural features, micro-hardness, and circumferential residual stress of the failed and non-failed FWH tubes by stress corrosion cracking (SCC), factors which could affect SCC..... More

                        
60 Mechanical Properties of Liquid Phase Sintered SiC Materials by the Addition of Unimodal and Bimodal Particles
단일 크기와 이중 크기의 탄화규소 입자를 이용한 액상소결 탄화규소의 기계적 특성
Jun Yeab Lee, Sang Pill Lee, Jin Kyung Lee, Moon Hee Lee, Seung Kuk Hwang
이준엽, 이상필, 이진경, 이문희, 황승국
Korean J. Met. Mater. 2019;57(1):60-66.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.60

Abstract
Both the mechanical properties and probability distribution of liquid phase sintered SiC (LPS-SiC) materials were investigated, based on a detailed analysis of their microstructures. In particular, the effect of the starting sizes of SiC particles on the characterization of LPS-SiC materials was evaluated. LPS-SiC materials were fabricated with a constant..... More

                        
Technical Note
67 Direct Measurement of Electric Resistivity of Solid Electrolyte Interface Using 4-Point-Probe Technique
4점 탐침 측정법을 이용한 고상전해질계면의 비저항 측정
Jun-Hyoung Park, Yong-Seok Choi, Hyung Cheoul Shim, Jae-Pyoung Ahn, Jae-Chul Lee
박준형, 최용석, 심형철, 안재평, 이재철
Korean J. Met. Mater. 2019;57(1):67-70.   Published online 2018 Dec 14
DOI: https://doi.org/10.3365/KJMM.2019.57.1.67

Abstract
Lack of understanding on the electrical properties of the solid electrolyte interface (SEI) has been one of the major hurdles for developing fast charging Li-ion batteries. Here, we report our preliminary experimental result on the measurement of the electrical resistivity of SEI using the direct-contact technique based on electron microscopy..... More

                        
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