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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

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

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

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

                           Cited By 1
Formation Behavior of Ferrite Within LB and GTA Weld Zones of Mod. 9Cr-1Mo Steel in Terms of Thermal History
Mod. 9Cr-1Mo강 LB 및 GTA 용접부 열이력에 따른 δ 페라이트 생성거동
Nam-hun Jung, Jang-ho Ahn, Myung-jin Lee, Nam-hyun Kang, Kyung-Mox Cho
정남훈, 안장호, 이명진, 강남현, 조경목
Korean J. Met. Mater. 2018;56(2):93-102.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.93

The toughness and creep strength of Mod. 9Cr-1Mo steel, a ferritic heat resistant steel, are closely related to the amount of delta ferrite remaining in the weld. This study compared the amount of retained δ ferrite in the laser beam (LB) weld with low heat input and the gas tungsten..... More

Inhomogeneous Deformation of Interstitial Free Steel during the High Pressure Torsion Process
Yuepeng Song, Miaomiao Chen, Wenke Wang, Baoyan Xu, Dongsheng Gao, Shuai Zhang, Hyoung Seop Kim
Korean J. Met. Mater. 2017;55(10):710-715.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.710

Interstitial free (IF) steel disks were subjected to various degrees of revolution during application of the high-pressure torsion (HPT) process, and the resulting distributions of hardness and microstructure during the early torsion stage of high-pressure torsion (HPT) were investigated using experimental and simulation approaches. The results indicated that the deformation..... More

Effects of Friction and Anvil Design on Plastic Deformation during the Compression Stage of High-Pressure Torsion
Yuepeng Song, Miaomiao Chen, Baoyan Xu, Dongsheng Gao, Jing Guo, Lingfeng Xu, Zheng Wang, Hyoung Seop Kim
Korean J. Met. Mater. 2016;54(11):831-837.   Published online 2016 Nov 5
DOI: https://doi.org/10.3365/KJMM.2016.54.11.831

Herein, we report the results of our investigation on the effect of friction and anvil design on the heterogeneous plastic-deformation characteristics of copper during the compressive stage of high-pressure torsion (HPT), using the finite element method. The results indicate that the friction and anvil geometry play important roles in the..... More

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