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Hydrogen Induced Cracks in Stainless Steel 304 in Hydrogen Pressure and Stress Corrosive Atmosphere
수소가압 및 응력부식 분위기에서 스테인레스강 SS304의 수소취성균열
Byung Hak Choe, Sang Woo Lee, Jong Kee Ahn, Jinhee Lee, Tae Woon Lim
최병학, 이상우, 안종기, 이진희, 임태운
Korean J. Met. Mater. 2020;58(10):653-659.   Published online 2020 Oct 5
DOI: https://doi.org/10.3365/KJMM.2020.58.10.653

Abstract
The phenomena of hydrogen induced cracking (HIC) in 304 stainless steels was considered in a hydrogen pressure and stress corrosive atmosphere. Microstructures with chloride pits and stress corrosion cracks around the HIC were analyzed by SEM/EDS. Abnormal phase transformations induced by the hydrogen were analyzed using TEM and diffraction. In..... More

                        
Influence of Heat Treatment on Mechanical Properties for Cold Worked 304 Austenitic Stainless Steel
냉간압연 된 304 오스테나이트 스테인리스강의 열처리에 의한 기계적 특성 평가
Minha Park, Kwangyoon Kim, Jaeho Jang, Hyoung Chan Kim, Hyoung-Seok Moon, Jong Bae Jeon, Dae-Geun Nam, Keun Yong Sohn, Byung Jun Kim
박민하, 김광윤, 장재호, 김형찬, 문형석, 전종배, 남대근, 손근용, 김병준
Korean J. Met. Mater. 2018;56(7):490-498.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.490

Abstract
Austenitic stainless steels are widely used in a variety of industries, such as power plants, aerospace, automotive, construction and electronics, due to their excellent mechanical properties including ductility, toughness and corrosion resistance. For application in various industries, many parts and products require plastic processes such as cold rolling, cold forging..... More

                           Cited By 1
Effect of Oxygen Content on the Phase Transformation of Ti-5Al-2.5Fe Alloy During Continuous Cooling
연속냉각 중 산소함량이 Ti-5Al-2.5Fe 합금의 상변태 거동에 미치는 영향
Do-Heon Kim, Jong Woo Won, Dae-Won Jeong, Hak-Sung Lee, Seog-Young Yoon, Yong-Taek Hyun
김도헌, 원종우, 정대원, 이학성, 윤석영, 현용택
Korean J. Met. Mater. 2017;55(9):600-608.   Published online 2017 Aug 30
DOI: https://doi.org/10.3365/KJMM.2017.55.9.600

Abstract
The effects of oxygen content on the β to α phase transformation of the Ti-5Al-2.5Fe alloy during continuous cooling were investigated by varying the oxygen content between 0.08 – 0.41 wt%. Dilatometer tests were performed at cooling rates of 0.05 – 100 ℃/s combined with microstructure observation to examine phase..... More

      
Phase Transformation Behavior of Oxide Particles Formed in Mechanically Alloyed Fe-5Y<sub>2</sub>O<sub>3</sub> Powder
Fe-5Y2O3 조성의 기계적 합금화 분말에 형성된 산화물의 상변태 거동
Ga Eon Kim, Jung-Sun Choi, Sanghoon Noh, Suk Hoon Kang, Byoung Kwon Choi, Young Do Kim, Tae Kyu Kim
김가언, 최정선, 노상훈, 강석훈, 최병권, 김영도, 김태규
Korean J. Met. Mater. 2017;55(5):357-362.   Published online 2017 May 9
DOI: https://doi.org/10.3365/KJMM.2017.55.5.357

Abstract
The phase transformation behavior of the oxides formed in mechanically alloyed Fe-5Y2O3 powder is investigated. Non-stoichiometric Y-rich and Fe-rich oxides with sizes of less than 300 nm are observed in the mechanically alloyed powder. The diffusion and redistribution reactions of the elements in these oxides during heating of the powder..... More

      
Optical Devices & Energy Materials
Properties of a Counter Electrode with Cobalt Silicides in a Dye Sensitized Solar Cell
코발트실리사이드 상대전극을 채용한 염료감응형 태양전지의 물성 연구
Yunyoung Noh, Kwangbae Kim, Ohsung Song
노윤영, 김광배, 송오성
Korean J. Met. Mater. 2017;55(1):39-45.   Published online 2017 Jan 5
DOI: https://doi.org/10.3365/KJMM.2017.55.1.39

Abstract
Cobalt silicide was used as a counter electrode to replace the Pt catalytic layer of a dye-sensitized solar cell (DSSC) device. 100 nm Si/ 100 nm Co on quartz was formed by sputtering and cobalt-silicides were formed by vacuum heat treatment at 500 ℃ and 700 ℃ for 30 min,..... More

      
Carbothermal Reduction of Oxide of WC/Co Hardmetal Scrap
WC/Co 초경 스크랩 산화물의 환원/침탄 반응
CheolMin Kwon, Gil-Geun Lee, Gook-Hyun Ha
권철민, 이길근, 하국현
Korean J. Met. Mater. 2016;54(10):743-751.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.743

Abstract
This study conducted an analysis of the carbothermal reduction of oxidized WC/Co hardmetal scrap with solid carbon under an argon and hydrogen gas atmosphere. The WC/Co hardmetal scrap oxide consisted of WO3 and CoWO4. WO3 was reduced before CoWO4 by the solid carbon regardless of gas atmosphere. The simple oxide..... More

         Cited By 1
Optical Devices & Energy Materials
Properties of a Counter Electrode with Nickel Silicides in a Dye Sensitized Solar Cell
니켈실리사이드 상대전극을 이용한 염료감응형 태양전지의 물성 연구
Kwangbae Kim, Yunyoung Noh, Minkyoung Choi, Ohsung Song
김광배, 노윤영, 최민경, 송오성
Korean J. Met. Mater. 2016;54(8):615-620.   Published online 2016 Aug 5
DOI: https://doi.org/10.3365/KJMM.2016.54.8.615

Abstract
Nickel silicide was used as a counter electrode to replace the Pt catalytic layer of a dye-sensitized solar cell (DSSC) device. 50 nm Si/ 50 nm Ni was formed on glass or quartz by sputtering, and nickel silicides were formed by vacuum heat treatments at 450 and 800 ℃ for..... More

         Cited By 1
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