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Microstructures and mechanical properties of austenitic light-weight steels, and prediction of property distribution in large-scale slab
오스테나이트계 경량철강의 냉각 조건에 따른 미세조직, 기계적 특성 이해 및 대형 슬라브 내부 특성 분포 예측 연구
Tae-Ha Kim, Yoon Suk Choi, Kyeong-Won Kim, Seong-Jun Park, Jun Young Park, Kyeongjae Jeong, Heung Nam Han, Jong-Ho Shin
김태하, 최윤석, 김경원, 박성준, 박준영, 정경재, 한흥남, 신종호
Korean J. Met. Mater. 2020;58(12):830-842.   Published online 2020 Dec 4
DOI: https://doi.org/10.3365/KJMM.2020.58.12.830

Abstract
The effects of the cooling rate, after solution heat treatment, on the microstructures and mechanical properties of Fe-22Mn-8Al-0.8C-0.02Nb (low carbon) and Fe-20Mn-8Al-1.1C-0.1Nb (high carbon) light-weight steels were systematically investigated. The cooling process was controlled to achieve six different cooling rates, ranging from -0.016 to -465.1 oC/s. Under the slowest cooling..... More

                        
A Study on Uniaxial Tensile Deformation Behavior of Superelastic Titanium Alloy
초탄성 티타늄 합금의 인장 변형거동 고찰
Hye-Jin Jeong, Viet Tien Luu, Yong-Ha Jeong, Sung-Tae Hong, Heung Nam Han
정혜진, 르우비엣띠엔, 정용하, 홍성태, 한흥남
Korean J. Met. Mater. 2020;58(3):162-168.   Published online 2020 Mar 5
DOI: https://doi.org/10.3365/KJMM.2020.58.3.162

Abstract
A superelastic titanium alloy was subjected to uniaxial tensile deformation at room temperature. The microstructural evolution and deformation mechanisms of the superelastic titanium alloy were investigated by electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). Multiple deformation mechanisms including stress-induced martensitic transformation (SIMT), dislocation slip, {332}<113> and {112}<111> mechanical twinning..... More

                        
Effect of Cooling Rate on the Microstructure and Mechanical Properties of Fe-Mn-Al-C Light-Weight Steels
Fe-Mn-Al-C계 경량철강의 미세조직 및 기계적 물성 변화에 미치는 냉각속도의 영향
Jun Young Park, Seong-Jun Park, Jae-Hyun Lee, Joonoh Moon, Tae-Ho Lee, Kyeong Jae Jeong, Heung Nam Han, Jong-Ho Shin
박준영, 박성준, 이재현, 문준오, 이태호, 정경재, 한흥남, 신종호
Korean J. Met. Mater. 2017;55(12):825-835.   Published online 2017 Dec 4
DOI: https://doi.org/10.3365/KJMM.2017.55.12.825

Abstract
The effects of cooling after solution heat treatment on the microstructure and mechanical properties of light-weight steels were investigated using Fe-30Mn-xAl-0.9C alloys containing 9.0–12.8 wt% Al. Lab-scale specimens (thickness: 10 mm) of the alloys were cooled by different cooling rates from -337 to -0.053 ℃/s using water, air, and furnace..... More

      
Growth Behavior of Intermetallic Compound in Dissimilar Al-Cu Joints Under Direct Current
알루미늄-구리 이종 도체 접합부에서 직류 전기 인가에 따른 금속간화합물의 성장 거동
Jeong-Ik Kim, Sung-woo Jin, Jinwook Jung, Hyun-Min Sung, Hye-Jin Jeong, Siwook Park, Ju-Won Park, Heung Nam Han
김정익, 진성우, 정진욱, 성현민, 정혜진, 박시욱, 박주원, 한흥남
Korean J. Met. Mater. 2017;55(6):372-378.   Published online 2017 Jun 1
DOI: https://doi.org/10.3365/KJMM.2017.55.6.372

Abstract
Aluminum conductors are increasingly replacing copper because Al has lower cost and lighter weight, and consequently the demand for Al-Cu joints for industrial applications is growing. However, an intermetallic compound is known to grow at the Al-Cu interface, and will result in fracture if it grows above a critical thickness...... More

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