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Effect of In-Situ Post Heating on Repairing STS316L Built by Laser Powder Bed Fusion Using Direct Energy Deposition
레이저로 적층 제조된 STS316L에 대한 직접에너지적층 응용 보수 시 공정 중 후열처리(In-Situ Post Heating) 효과
Wook Jin Oh, Yong Son, Do Sik Shim
오욱진, 손용, 심도식
Korean J. Met. Mater. 2019;57(8):543-553.   Published online 2019 Jul 11
DOI: https://doi.org/10.3365/KJMM.2019.57.8.543

Abstract
The repairing parts were fabricated by PBF (powder bed fusion) using direct energy deposition (DED), interfacial cracks can occur at the interface between the substrate and the area to be repaired. Such interfacial defects are due to the thermal stress induced by the temperature gradient which results from repeated melting..... More

                        
Investigation of the Texture and Dislocation Behavior of AZ31 Magnesium Alloy Under Different Strain Rate Conditions
변형률 속도에 따른 AZ31 Mg 합금의 집합조직 및 전위 거동 관찰
Dong-Gi Lee, Jun-Beom Kwon, Hyun-Jong Lee, Su-Mi Jo, oung-Mok Rhyim, Won-Jon Yang, Yang-do Kim
이동기, 권준범, 이현종, 조수미, 임영목, 양원존, 김양도
Korean J. Met. Mater. 2019;57(5):279-288.   Published online 2019 May 5
DOI: https://doi.org/10.3365/KJMM.2019.57.5.279

Abstract
This study is concerned with the influence of strain rate on the plastic deformation behavior and microstructure variables of AZ31 magnesium alloy sheet. The tensile properties were measured at room temperature at a strain rate of 0.001 and 100 s–1 using a universal tensile testing machine and servo-hydraulic high-speed tensile..... More

                        
Effects of Heat Treatment and Thermal Cycle Conditions on the Bonding Strength and Interfacial Characteristics of Electroplated Cr/Electroplated Ni-P Coatings
열처리 및 열 사이클 조건에 따른 전해 Cr/전해 Ni-P 도금의 접합강도 평가 및 계면분석
Jina Lee, Kirak Son, Myung-Hee Choi, Kyu Hwan Lee, Young-Bae Park
이진아, 손기락, 최명희, 이규환, 박영배
Korean J. Met. Mater. 2018;56(4):280-288.   Published online 2018 Apr 5
DOI: https://doi.org/10.3365/KJMM.2018.56.4.280

Abstract
The effects of heat treatment and thermal cycle conditions on the bonding strength and interfacial characteristics of electroplated Cr/electroplated Ni-P coatings were systematically evaluated. With step1 samples, heat treatment was performed at 750 oC for 6 hours after successive electroplating of Ni-P and Cr layers. With step2 samples, 1st heat..... More

      
Temperature Dependency of the Tensile Characteristics and Transition of Fracture Behaviors in a Novel Infiltrated TiC-SKD11 Composites
TiC-SKD11 함침 복합재의 온도에 따른 인장 특성과 파괴거동 변화
Nu-Ri Oh, Sang-Kwan Lee, Seung-Chan Cho, Il-Guk Jo, Keum-Cheol Hwang, Dae-Ha Kim, Young-Tae Cho, Dong-Woo Suh, Hyun-Uk Hong
오누리, 이상관, 조승찬, 조일국, 황금철, 김대하, 조영태, 서동우, 홍현욱
Korean J. Met. Mater. 2017;55(3):156-164.   Published online 2017 Mar 3
DOI: https://doi.org/10.3365/KJMM.2017.55.3.156

Abstract
A composite having 60 vol% of TiC particles was successfully fabricated by the infiltration of molten SKD11 tool steel into a TiC preform. The density of this composite was achieved to be 25% lighter than conventional steels. The penetration of the liquid metal reached geometrically complex regions without any interfacial..... More

      
Effect of Heat Treatment on the Diffusion-Bonded Ni-Base Alloy Hastelloy X
확산접합된 Ni기 합금 Hastelloy X에 미치는 후열처리 영향
Injin Sah, Jong-Bae Hwang, Sun-Ig Hong, Eung-Seon Kim, Min-Hwan Kim
사인진, 황종배, 홍순익, 김응선, 김민환
Korean J. Met. Mater. 2017;55(2):115-124.   Published online 2017 Feb 2
DOI: https://doi.org/10.3365/KJMM.2017.55.2.115

Abstract
The effect of post-bond heat treatment (PBHT) on diffusion-bonded polycrystalline Ni-base alloy Hastelloy X (Ni-22Cr-18Fe-8Mo) was evaluated in this study. Diffusion bonding was conducted under a compressive pressure of 14 MPa in the temperature range of 1100-1200 ℃. While (Cr,Mo)-rich and (Mo,Si)-rich precipitates were developed along the interface at 1100..... More

         Cited By 1
Effect of Bonding Pressure and Bonding Time on the Tensile Properties of Cu-Foam / Cu-Plate Diffusion Bonded Joint
Cu foam / Cu plate 간 고상확산접합부의 인장성질에 미치는 접합압력과 유지시간의 영향
Sang-Ho Kim, Hoe-Jun Heo, Tae-Jin Yoon, Chung-Yun Kang
김상호, 허회준, 윤태진, 강정윤
Korean J. Met. Mater. 2016;54(12):899-907.   Published online 2016 Dec 5
DOI: https://doi.org/10.3365/KJMM.2016.54.12.899

Abstract
Open cell Cu foam, which has been widely utilized in various industries because of its high thermal conductivity, lightweight and large surface area, was successfully joined with Cu plate by diffusion bonding. To prevent excessive deformation of the Cu foam during bonding process, the bonding pressure should be lower than..... More

      
Evaluation of Material Properties on the Inner Surface of Cr Plated Cladding Tube for Preventing Fuel-Cladding Chemical Interaction
FCCI 방지를 위한 내면 Cr 도금 피복관의 물성 평가
Jun Hwan Kim, Byoung Oon Lee, Jin Sik Cheon, Sung Ho Kim
김준환, 이병운, 천진식, 김성호
Korean J. Met. Mater. 2016;54(11):855-861.   Published online 2016 Nov 5
DOI: https://doi.org/10.3365/KJMM.2016.54.11.855
Abstract
Studies were carried out to apply electroplating technique to the inner surface of a nuclear fuel cladding tube to prevent a fuel-cladding chemical interaction (FCCI) in a sodium-cooled fast reactor (SFR). 20 μm thick Cr was uniformly plated onto the inner surface of a HT9 cladding tube with a 7.4... More
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