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Author :
Jeoung Han Kim 2 Articles
550 Direct Laser Deposition of 14Cr Oxide Dispersion Strengthened Steel Powders Using Y2O3 and HfO2 Dispersoids
Barton Mensah Arkhurst, Jin-Ju Park, Chang-Hoon Lee, Jeoung Han Kim
Korean J. Met. Mater. 2017;55(8):550-558.   Published online 2017 Aug 1
DOI: https://doi.org/10.3365/KJMM.2017.55.8.550

Abstract
This study investigated the feasibility of using HfO2 as a dispersoid in the additive manufacturing process, compared to Y2O3. The effect of pre-annealing treatment was investigated too. Scanning electron microscopy (SEM) analyses revealed unusually coarse deposition layers for both the HfO2 and Y2O3 dispersed oxide dispersion strengthed (ODS) steels, in..... More

         Cited By 1
716 Effect of Second Aging Treatment on the Microstructure and Mechanical Properties of SUH660 Alloy
SUH660합금의 미세조직 및 기계적 특성에 미치는 2차 시효 열처리의 영향
Do-Hoon Kim, You-Hwan Lee, Jeoung Han Kim
김도훈, 이유환, 김정한
Korean J. Met. Mater. 2016;54(10):716-722.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.716

Abstract
nSUH660 is a precipitation hardening stainless steel which has high strength at moderately high temperature. In this study, the effect of a secondary aging-treatment after the standard 720 °C heat-treatment was investigated. The Rockwell C hardness test with detailed TEM observerations was performed to study the steel’s hardening mechanism. The..... More

         Cited By 2
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