- [English]
- Fabrication of Layered Cu-Fe-Cu Structure by Cold Consolidation of Powders using High-pressure Torsion
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Peyman Asghari-Rad, Yeon Taek Choi, Nhung Thi-Cam Nguyen, Praveen Sathiyamoorthi, Hyoung Seop Kim
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J Korean Powder Metall Inst. 2021;28(4):287-292. Published online August 1, 2021
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DOI: https://doi.org/10.4150/KPMI.2021.28.4.287
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 Abstract
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In this study, the layered structures of immiscible Fe and Cu metals were employed to investigate the interface evolution through solid-state mixing. The pure Fe and Cu powders were cold-consolidated by high-pressure torsion (HPT) to fabricate a layered Cu-Fe-Cu structure. The microstructural evolutions and flow of immiscible Fe and Cu metals were investigated following different iterations of HPT processing. The results indicate that the HPTprocessed sample following four iterations showed a sharp chemical boundary between the Fe and Cu layers. In addition, the Cu powders exhibited perfect consolidation through HPT processing. However, the Fe layer contained many microcracks. After 20 iterations of HPT, the shear strain generated by HPT produced interface instability, which caused the initial layered structure to disappear. -
Citations
Citations to this article as recorded by  - Supreme tensile properties in precipitation-hardened 316L stainless steel fabricated through powder cold-consolidation and annealing
Do Won Lee, Peyman Asghari-Rad, Yoon-Uk Heo, Sujung Son, Hyojin Park, Ji-Su Lee, Jae-il Jang, Byeong-Joo Lee, Hyoung Seop Kim
Materials Science and Engineering: A.2024; 893: 146107. CrossRef
- [English]
- Stretch-Flangeability of Laser Powder Bed Fusion-Processed 316L Stainless Steel
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Rae Eon Kim, Yeon Taek Choi, Sang Guk Jeong, Do Won Lee, Hyoung Seop Kim
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Received January 15, 2025 Accepted April 9, 2025 Published online April 16, 2025
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DOI: https://doi.org/10.4150/jpm.2025.00017
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Abstract
 Supplementary Material
- Metal additive manufacturing (AM) facilitates the production of complex geometries with enhanced functionality. Among various AM techniques, laser powder bed fusion (LPBF) is distinguished by its precision and exceptional mechanical properties achieved via laser fusion deposition. Recent advancements in AM have focused on combining LPBF with post-processing methods such as cold rolling, high-pressure torsion, and forming processes. Therefore, understanding the forming behavior of LPBF-processed materials is essential for industrial adoption. This study investigates the stretch-flangeability of LPBF-fabricated 316L stainless steel, emphasizing its anisotropic microstructure and mechanical properties. Hole expansion tests were employed to assess stretch-flangeability in comparison to wrought 316L stainless steel. The results demonstrate that LPBF-processed samples exhibit significant anisotropic behavior, demonstrating the influence of microstructural evolution on formability. These findings contribute valuable insights into optimizing LPBF materials for industrial forming applications.
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