간행물

대한금속재료학회지 update

Korean journal of metals and materials

  • : 대한금속재료학회(구 대한금속학회)
  • : 공학분야  >  금속공학
  • : KCI등재
  • : SCI,SCOPUS
  • : 연속간행물
  • : 월간
  • : 1738-8228
  • : 2288-8241
  • : 금속재료학회지(~1999)→대한금속재료학회지(2000~)

수록정보
수록범위 : 1권1호(1963)~57권1호(2019) |수록논문 수 : 6,654
대한금속재료학회지
57권1호(2019년 01월) 수록논문
최근 권호 논문
| | | |

KCI등재 SCI SCOPUS

1전기화학촉매의 제일원리 계산 및 하이스루풋 스크리닝 연구 동향: 리뷰

저자 : 이창수 ( Changsoo Lee ) , 방기훈 ( Kihoon Bang ) , 홍두선 ( Doosun Hong ) , 이혁모 ( Hyuck Mo Lee )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 1-9 (9 pages)

다운로드

(기관인증 필요)

초록보기

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, combining of theory and experiment has proven to be an innovative strategy, providing a framework for the design of high-performance catalysts and to investigate their mechanisms. This review introduces recent progress in theoretical strategies for state-of-theart heterogeneous electrocatalysts. Theoretical approaches are essential for grasping the intrinsic nature of the catalytic materials. Various levels of model system, with corresponding descriptions to capture the realistic environment, are addressed. Meanwhile, machine learning using data obtained by high-throughput screening, exploited as a new scientific approach, is discussed. Based on this review, it is expected that theoretical approaches will shed light on the future design of electrocatalysts, allowing for the development of sustainable energy sources.
(Received October 17, 2018; Accepted November 27, 2018)

KCI등재 SCI SCOPUS

2Cu-3.5 wt% Ti 합금의 석출 거동에 미치는 시효 전 가공의 영향

저자 : 조민아 ( Minah Jo ) , 최은애 ( Eun-ae Choi ) , 안지혁 ( Jee Hyuk Ahn ) , 손영국 ( Young Guk Son ) , 김광호 ( Kwangho Kim ) , 이재현 ( Jehyun Lee ) , 사토시셈보시 ( Satoshi Semboshi ) , 한승전 ( Seung Zeon Han )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 10-17 (8 pages)

다운로드

(기관인증 필요)

초록보기

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 nonuniform deformation were aged at 450 ℃ for various times after solution treatment at 885 ℃. The uniformly and non-uniformly deformed alloys show slip and shear band formation in the matrix, respectively. The deformation bands, slip or shear bands, were still maintained even after 12 hours of aging at 450 ℃. The conductivity of all the specimens continuously increased, but the hardness reached the peak value and then decreased during aging. The hardness and conductivity of the specimen with shear bands had a higher value than the specimens without deformation and with slip bands. Additionally, the time to reach peak hardness of the specimen with shear bands was shortened to 30 minutes compared to 720 and 1440 minutes for specimens with slip bands and without deformation bands, respectively. The highest combination value of conductivity and hardness, 16.8% IACS and 302 Hv, was obtained in the specimen with shear bands after aging for 360 minutes.
(Received September 27, 2018; Accepted ℃tober 19, 2018)

KCI등재 SCI SCOPUS

3유한요소해석을 이용한 AA1100의 다축 단조와 다축대각 단조의 비교

저자 : 정효태 ( Hyo-tae Jeong ) , 김민성 ( Minseong Kim ) , 권상철 ( Sangchul Kwon ) , 김순태 ( Suntae Kim ) , 이성 ( Seong Lee ) , 최시훈 ( Shi-hoon Choi )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 18-27 (10 pages)

다운로드

(기관인증 필요)

초록보기

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 that involved from 1 to 12 passes through the MADF; and, Route C corresponded to a conventional multi-axial forging process in which the operations from 1 to 6 passes of the MADF were simply repeated twice. From the aspect of strain uniformity developed on AA1100, Route B, which combined forging operations to the direction perpendicular to the face of the workpiece and forging operations to the diagonal direction of the face of the workpiece, was relatively advantageous compared with Routes A and C that only involved forging operations to the direction perpendicular to the face of the workpiece. Routes A and C showed a tendency toward regions where both the low and the high effective strains were restricted to specific regions of the workpiece. The low and high effective strains created by Route B, on the other hand, tended to be distributed over various regions of the workpiece.
(Received October 1, 2018; Accpeted November 2, 2018)

KCI등재 SCI SCOPUS

4고강도 탄소강 FCA 용착금속의 고온균열 저항성과 저온 충격인성에 미치는 보론과 망간의 영향

저자 : 박수길 ( Su-kil Park ) , 조영호 ( Young-ho Cho ) , 지춘호 ( Chun-ho Jee ) , 이정훈 ( Junghoon Lee ) , 서성문 ( Seong-moon Seo ) , 강남현 ( Namhyun Kang )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 28-37 (10 pages)

다운로드

(기관인증 필요)

초록보기

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 the welding consumable. Welding consumables with higher B contents resulted in longer total crack length and an increased number of cracks. Boron was intensely detected near the grain boundary of the weld centerline by secondary ion mass spectrometry (SIMS) analysis, and precipitated with boron carbide (Fe23(C,B)6), as analyzed by transmission electron microscopy (TEM). This promoted hot crack propagation in the high strength carbon steel welds. However, removing B from the welding consumable decreased the low temperature toughness for root and face weld metals, due to the growth of ferrite side plate (FSP), compared with welding consumables having more B or Mn contents. The addition of Mn in the weld metal suppressed the formation of FSP and increased low temperature toughness. Therefore, the minimization of B and the supplement of Mn successfully achieved hot crack resistance and low temperature toughness for high strength carbon steel welds of 550 MPa tensile strength.
(Received October 5, 2018 ; Accepted November 17, 2018)

다운로드

(기관인증 필요)

초록보기

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 PZT material was chosen due to its complex microstructure, which originates from the coexistence of tetragonal and rhombohedral phases. A micromechanical test rig was installed on the sample stage controller, enabling precise control of the sample position. For the real-time strain monitoring of the PZT sample, a strain gauge was attached to the sample surface on which the PFM scan was conducted. In addition, analysis of the ferroelectric domain structure was assisted by using the electron backscatter diffraction (EBSD) technique to identify the habit planes of non- 180° domain walls and grain boundaries in the PFM images. From a certain grain, a set of large non-180° needle-like domain patterns in the (101) plane were observed before applying a mechanical stress. With increasing compressive stress levels, another set of non-180° needle-like domain patterns grew in the (011) plane, overwriting the domain patterns in the (101) plane. This indicates that polarization switching processes in ferroelectric ceramics take place via a pattern evolution based on the pre-existing domain patterns.
(Received October 22, 2018; Accepted November 19, 2018)

KCI등재 SCI SCOPUS

6Analysis of a Slab and Slab Heater Cover in a Compact Endless Cast and Rolling Mill Process Using Finite Element Methods

저자 : Jong Won Baek , Joo Won Oh , Jae-sook Chung , Yong-seok Cho , Seong Jin Park

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 43-50 (8 pages)

다운로드

(기관인증 필요)

초록보기

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 be increased. This led to a temperature drop in the slab. The temperature distribution of the slab impacts quality, so new layout was developed. This paper presents a Finite Element Method (FEM) simulation of thermal behavior in the slab employing slab heater covers. All of the simulation results were verified by comparing them with experimental results. The slab moving distance at which the temperature was saturated during the process was determined to consider the steady-state and analyze the temperature distribution of the slab and slab heater. Those results revealed that the efficiency of heat conservation increased by more than 50% using the slab heater cover. Finally, a sensitivity analysis of the slab heater cover was conducted with respect to the cover design. The effects of insulator thickness, the gap distance between the slab and cover, and material parameters such as density, and specific heat were investigated to optimize the design of the slab heater cover to produce the best quality slab.
(Received November 6, 2018; Accepted November 13, 2018)

KCI등재 SCI SCOPUS

7오스테나이트 스테인리스강 튜브의 응력부식균열 민감도에 영향을 미치는 미세조직 및 잔류응력 비교

저자 : 이호중 ( Ho Jung Lee ) , 오승진 ( Seungjin Oh ) , 김홍덕 ( Hongdeok Kim )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 51-59 (9 pages)

다운로드

(기관인증 필요)

초록보기

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 susceptibility were assessed. Considering the impurity controlled and hydrogenated water chemistry, it is likely the mechanism of sudden SCC failures under PWR operation would be associated with material aspects rather than water chemistry. In tubes which experienced a large number of SCC failures, significant tensile circumferential residual stresses were measured. Such residual stress could be generated by work hardening during straightening of the rolling process, which directly applies stress on the surface of the tubes. The non-failed tube showed very low residual stress, by using straightening or stretching process. The rolling process induces a large amount of dislocations and an increasing tendency in micro-hardness values toward the outer region. Although the hardness values satisfied the material limitation requirement, the presence of large residual stress is thought to increase the SCC susceptibility of FWH tubes. Thus, this study indicates that straightening by stretching process has benefits in terms of low residual stress, assuring the long-term integrity of FWH tubes against SCC failure. Meanwhile, when the rolling process is used, additional heat treatment could be a practical method to reduce residual stress in FHW tubes.
(Received September 3, 2018; Accepted November 28, 2018)

KCI등재 SCI SCOPUS

8단일 크기와 이중 크기의 탄화규소 입자를 이용한 액상소결 탄화규소의 기계적 특성

저자 : 이준엽 ( Jun Yeab Lee ) , 이상필 ( Sang Pill Lee ) , 이진경 ( Jin Kyung Lee ) , 이문희 ( Moon Hee Lee ) , 황승국 ( Seung Kuk Hwang )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 60-66 (7 pages)

다운로드

(기관인증 필요)

초록보기

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 applied pressure, using a complex powder of different sized SiC particles. Two types of initial SiC powders used for the fabrication of LPS-SiC materials were a unimodal SiC single powder with the average particle size of 0.3 μm, and a bimodal SiC powder mixture with average particle sizes of 0.3 μm and 30 nm, respectively. A complex powder of Al2O3 and Y2O3 particles was also utilized as an additive material for the consolidation of the LPS-SiC materials. The characterization of the LPS-SiC materials was performed using microstructural observation, three-point bending test and micro Vickers hardness test. The LPS-SiC materials containing the unimodal SiC powder exhibited a good sintered density of about 3.11 g/cm3 and a low porosity of about 5.4%. The bimodal mixture of different SiC particles did not significantly affect the sintered density of LPS-SiC materials. However, LPS-SiC materials containing the bimodal SiC powder exhibited an average flexural strength about 630 MPa higher than that of unimodal SiC powder, accompanied by the creation of fine SiC grains in the range of about 0.2~1.4 μm. The LPS-SiC materials exhibited a similar hardness level of about 2200 Hv regardless of the starting SiC powders. The bimodal SiC powder also produced a higher shape parameter and variability in hardness in the Weibull statistical analysis.
(Received October 10, 2018; Accepted November 12, 2018)

KCI등재 SCI SCOPUS

94점 탐침 측정법을 이용한 고상전해질계면의 비저항 측정

저자 : 박준형 ( Jun-hyoung Park ) , 최용석 ( Yong-seok Choi ) , 심형철 ( Hyung Cheoul Shim ) , 안재평 ( Jae-pyoung Ahn ) , 이재철 ( Jae-chul Lee )

발행기관 : 대한금속재료학회(구 대한금속학회) 간행물 : 대한금속재료학회지 57권 1호 발행 연도 : 2019 페이지 : pp. 67-70 (4 pages)

다운로드

(기관인증 필요)

초록보기

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 combined with 4-point-probe micro-electrical method. We observed that the SEI layer, which covers uniformly the surface of the graphite anode, exhibits a high resistivity (2.3 × 105 Ω·m) comparable to those of typical insulators. In this study, using first principles calculations performed on the computational LixF1-x (0.25 < x < 0.75) phases, we elucidate the structural origin responsible for the measured resistivity of SEI by analyzing the electronic structures.
(Received September 4, 2018; Accepted September 19, 2018)

1
권호별 보기
가장 많이 인용된 논문

(자료제공: 네이버학술정보)

가장 많이 인용된 논문
| | | |
1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

다운로드

2미국의 비트코인 규제

(2006)홍길동심리학41회 피인용

다운로드

가장 많이 참고한 논문

(자료제공: 네이버학술정보)

가장 많이 참고한 논문

다운로드

2미국의 비트코인 규제

(2006)홍길동41회 피인용

다운로드

해당 간행물 관심 구독기관

순천대학교 부경대학교 전북대학교 부산대학교 수원대학교
 142
 49
 39
 34
 24
  • 1 순천대학교 (142건)
  • 2 부경대학교 (49건)
  • 3 전북대학교 (39건)
  • 4 부산대학교 (34건)
  • 5 수원대학교 (24건)
  • 6 연세대학교 (20건)
  • 7 현대자동차 (18건)
  • 8 인하대학교 (15건)
  • 9 조선대학교 (14건)
  • 10 동아대학교 (14건)

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기