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Microstructure and Tensile Properties of Ni-Base Superalloy IN738LC according to Solidification Rate and Heat Treatment
Ni기 초내열합금 IN738LC의 응고속도와 열처리에 따른 미세조직 및 인장 특성
Byung-Hoon Kim, Byeong-Ook Kong, Yun-Kon Joo, Young-Kyu Ju, Hyun-Uk Hong, Je-Hyun Lee
김병훈, 공병욱, 주윤곤, 주영규, 홍현욱, 이재현
Korean J. Met. Mater. 2024;62(6):445-454.   Published online 2024 May 31
DOI: https://doi.org/10.3365/KJMM.2024.62.6.445

The strength of Ni-base superalloys mainly depends on the γ' precipitates that improve the strength of the materials at high temperatures. The presence of γ' particles within the matrix restricts dislocation movement, and optimized heat treatments can tailor the size, shape, and volume fraction of γ'. In this study the..... More

A Study on the Relationship between Microstructure and Impact Toughness with Different Heat Inputs and Post-Seam Annealing Temperatures in API X70 Electric Resistance Welded Steel Pipe
항복강도 70 ksi급 전기저항용접 강관의 입열량 및 심 어닐링 온도에 따른 미세조직과 저온충격인성 상관관계 고찰
Tae-Hun Kim, Chiwon Kim, Chan-Hee Lee, Jinseop Kwack, Donghyeon Jeon, Hyun-Uk Hong
김태훈, 김치원, 이찬희, 곽진섭, 전동현, 홍현욱
Korean J. Met. Mater. 2023;61(9):659-668.   Published online 2023 Aug 30
DOI: https://doi.org/10.3365/KJMM.2023.61.9.659

In this study, the influence of heat input and post-seam annealing (PSA) temperature on the microstructure and impact toughness of electric resistance welded (ERWed) API X70 steel pipe was investigated. The ERW seam welds of pipes were fabricated with low, moderate, and high heat inputs, and followed by the PSA..... More

Characterization of Microstructures and Creep Fracture Characteristics of Dissimilar Metal Welds between Inconel 740H Ni-Based Superalloy and Gr.92 Ferritic Steel
니켈기 Inconel 740H 초내열합금과 고Cr계 Gr.92 내열강의 이종금속 용접부의 미세조직 및 크리프 파단 특성
Kyeong-Yong Shin, Ji-Won Lee, Jung-Min Han, Kyong-Woon Lee, Byeong-Ook Kong, Hyun-Uk Hong
신경용, 이지원, 한정민, 이경운, 공병욱, 홍현욱
Korean J. Met. Mater. 2018;56(5):375-383.   Published online 2018 May 8
DOI: https://doi.org/10.3365/KJMM.2018.56.5.375

Microstructure evolution and the creep fracture characteristics of dissimilar welds between Ni-based superalloy Inconel 740H and High Cr ferritic steel Gr.92 were investigated. The dissimilar welds were fabricated by shielded metal arc (SMA) welding process with Ni-based austenitic Inconel 182 superalloy. Postweld heat treatment at 760 oC for 4 hours..... More

       Crossref 6
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

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

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