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177 |
Martensitic Transformation and Enhancement of Mechanical Property of Nb-Ni-Ti Alloy by Healing Treatment
Nb-Ni-Ti 합금의 치유 과정을 이용한 마르텐사이트 변태 및 기계적 특성의 향상
Cham Il Kim, Eun Soo Park, Do Hyang Kim김참일, 박은수, 김도향
Korean J. Met. Mater. 2025;63(3):177-185. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.177
Abstract
The aim of the present study is to enhance the stress recovery capability of the β Nb phase in NbNi-Ti alloy by using the shape memory effect (SME) of the NiTi phase. The concept of healing treatment to recover the mechanical property has been newly introduced for Nb-Ni-Ti alloy. Nb-29.2at%Ni-40.8at%Ti..... More
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186 |
Strengthening of Austenitic Steel 316 Alloy by Incorporating ZrO2 Particles via Mechanical Alloying and Vacuum Hot-Pressing
K. Raja Rao, Hansung Lee, Man Mohan, Sheetal Kumar Dewangan, Cheenepalli Nagarjuna, Kwan Lee, Sudip Kumar Sinha, Byungmin Ahn
Korean J. Met. Mater. 2025;63(3):186-196. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.186
Abstract
This study examines the influence of ZrO 2 on austenitic stainless steel 316 (ASS 316). Following the addition of varying weight percentages (0, 1, 2, and 3) of ZrO 2 to ASS 316 powder, the samples were ball-milled for a duration of 30 h and then subjected to vacuum hot-pressing (VHP) for..... More
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197 |
Effect of Artificial Aging Temperature on the T6 Behavior of Naturally Aged Al-Si-Mg Alloy
인공시효 온도가 자연시효된 Al-Si-Mg 합금의 T6 거동에 미치는 영향
Hyeon-Woo Son, Jae-Eun Jeong, Young-Hee Cho, Soo-Bae Kim, Jung-Moo Lee손현우, 정재은, 조영희, 김수배, 이정무
Korean J. Met. Mater. 2025;63(3):197-202. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.197
Abstract
The artificial aging behavior of Al-Si-Mg alloy naturally aged for 1 hour and 7 days at room temperature was analyzed using hardness, DSC and TEM. The Al-Si-Mg alloy naturally aged for 7 days at room temperature showed a decrease in maximum hardness during artificial aging at 160 oC compared to the..... More
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203 |
Electrical Characteristics of Time-Dependent Flexible Organic Ferroelectric Field-Effect Transistors
Hyeonju Lee, Chintalapalli Jyothi, Dongwook Kim, Youngjun Yun, Jaehoon Park
Korean J. Met. Mater. 2025;63(3):203-209. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.203
Abstract
Organic ferroelectric field-effect transistors (Fe-FETs) are highly attractive for memory device applications because of their ability to read data without causing damage (nondestructive readout) and their excellent retention capabilities. These attributes make organic Fe-FETs an appealing alternative to their inorganic counterparts, which, while demonstrating superior memory performance for practical applications,..... More
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210 |
Effect of MPSA and PEG Addition on the Characteristics of Electrolytic Copper Foil
MPSA와 PEG 첨가 조건에 따른 전해동박의 특성 변화
Jong-Jae Park, Jun-Seo Yoon, Tae-Gyu Woo, Il-Song Park박종재, 윤준서, 우태규, 박일송
Korean J. Met. Mater. 2025;63(3):210-216. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.210
Abstract
This study evaluated the effects of various amounts of MPSA and PEG on the surface properties, crystal structure, and mechanical properties of electrolytic copper foil, and PVP was used as an eco-friendly leveler. As the amount of MPSA increased, protrusions and dents were observed on the surface, which did not..... More
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217 |
Preparation and Characterization of Eye Medical Hydrogel Lens Polymers Containing Tretinoin
Hye-In Park, A-Young Sung
Korean J. Met. Mater. 2025;63(3):217-223. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.217
Abstract
This study analyzed the physical properties of hydrogel lens prepared by photopolymerization and thermal polymerization using tretinoin (ATRA) as an additive to improve functionality, such as alleviating dry eyes and to impart antibacterial properties. In addition, we wanted to confirm the applicability of the ophthalmic material as a drug delivery..... More
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224 |
The Effect of Microstructures in AZ31, Al5052, and Cu on Electromagnetic Shielding Effectiveness
AZ31, Al5052, Cu 미세조직이 전자파 차폐 효과에 미치는 영향
Kyeng-Taek Kim, Seong-Je Kim, Min-Hyeok Kang, Sangbong Yi김경택, 김성제, 강민혁, 이상봉
Korean J. Met. Mater. 2025;63(3):224-230. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.224
Abstract
With the widespread use of electronic devices in the telecommunications industry, exposure to electromagnetic waves has largely increased in the last decades. In addition to concerns about heath issues caused by an accumulative exposure to electromagnetic waves, electromagnetic interference causes malfunctions in complex electronic devices and degrades signal quality. The..... More
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231 |
Preprocessing of Inconsistent Creep Data Collected from a Literature Survey to Provide Reliable and Consistent Creep Life Prediction
Taejoo Lee, Chang-Seok Oh, Yoon Suk Choi
Korean J. Met. Mater. 2025;63(3):231-241. Published online 2025 Mar 5 DOI: https://doi.org/10.3365/KJMM.2025.63.3.231
Abstract
Numerous studies on machine learning-based creep life prediction using the creep data collected from various existing experimental data have been reported. Since the prediction of creep life is heavily influenced by the quality and integrity of the collected creep data, data preprocessing is required to eliminate physically inconsistent creep datapoints,..... More
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