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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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Precipitation Behavior and Mechanical Properties of High-Nitrogen Austenitic Stainless Steel According to Chemical Composition and Heat Treatment Temperature
고질소 오스테나이트계 스테인리스강의 화학조성과 열처리 온도에 따른 석출거동 및 기계적 특성
Ki-Hwan Kwon, Seong Hoon Kim, Hyo-Haeng Jo, Jinjong Lee, Heon-Young Ha, Chang-Hoon Lee, Jae-Suk Jeong, Tae-Ho Lee, Nam Hyun Kang권기환, 김성훈, 조효행, 이진종, 하헌영, 이창훈, 정재석, 이태호, 강남현
Korean J. Met. Mater.
2025;63(2):143-151. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.143
Abstract
The precipitation behavior and mechanical properties of high-nitrogen austenitic stainless steels were investigated for various chemical compositions and solution treatment temperatures. For this study, Fe-22.1Cr-12.2Ni-5.1Mn-2.1Mo alloys with three different sets of Nb, V, and N contents were prepared, and two distinct solution treatment temperatures were applied. An increase in Nb.....
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The Influence of S Addition and Aging Heat-Treatment on the Machinability in Austenitic Lightweight Steels
S 첨가 및 시효열처리에 의한 오스테나이트계 경량철강의 절삭성 변화에 관한 연구
Chang-Uk Lee, Kyeong-Won Kim, Chang-Hoon Lee, Hyungkwon Park, Seong-Jun Park이창욱, 김경원, 이창훈, 박형권, 박성준
Korean J. Met. Mater.
2025;63(2):109-120. Published online 2025 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.2.109
Abstract
Machining processes are crucial in industrial applications for shaping steel into specific structural products, and represent a significant portion of the product cost. However, the machinability of lightweight steel is poor, and it exhibits the characteristics of difficult-to-machine materials. This study investigated the effect of adding sulfur on the machinability.....
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Direct Laser Deposition of 14Cr Oxide Dispersion Strengthened Steel Powders Using Y
2
O
3
and HfO
2
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 HfO
2
as a dispersoid in the additive manufacturing process, compared to Y
2
O
3
. The effect of pre-annealing treatment was investigated too. Scanning electron microscopy (SEM) analyses revealed unusually coarse deposition layers for both the HfO
2
and Y
2
O
3
dispersed oxide dispersion strengthed (ODS) steels, in.....
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