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A Study on the Influence of Laser Power on the Microstructure and Mechanical Properties of Functionally Graded Materials Produced by Direct Energy Deposition
고에너지 직접 적층법으로 제조된 경사조성재료의 미세조직 및 기계적 특성에 미치는 레이저 출력의 영향 연구
Giseung Shin, Ji hyun Yoon, Dae Whan Kim, Yongho Park, Jeoung Han Kim
신기승, 윤지현, 김대환, 박용호, 김정한
Korean J. Met. Mater. 2020;58(11):782-792.   Published online 2020 Oct 15
DOI: https://doi.org/10.3365/KJMM.2020.58.11.782

This study investigated the effects of laser power on the microstructure and mechanical properties of functionally gradient materials (FGM) produced by direct energy deposition. The FGM consisted of five different layers, which were a mixture of austenitic stainless steel (Type 316L) and ferritic steel (HSLA). During the direct energy deposition,..... More

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

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
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

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 3
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