Article
Materials Science, Multidisciplinary
Jinhua Ding, Cheng Lu, Yijiao Sun, Chunxiang Cui, Ertuan Zhao
Summary: The Al-Zr-Sr inoculation showed excellent refining and modification effects on Al-7Si-0.5 Mg alloy, with the refining effect gradually enhanced with the increase of inoculant dosage. However, excessive Zr element in the inoculant can lead to the appearance of large rod-like particles, resulting in a decrease in elongation of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Mingjin Wu, Feng Jiang, Jingyu Jiang
Summary: The high temperature oxidation behavior of Al-Mg-Sc alloy was investigated, and the structure, composition and microstructure evolution near the interface were analyzed. The oxide layer was mainly composed of MgO and small amounts of MgAl2O4, and the phenomenon of grain boundary wetting by the second solid phase was observed.
Article
Materials Science, Multidisciplinary
Shijie Song, Han Yan, Meng Cai, Yu Huang, Xiaoqiang Fan, Xuejun Cui, Minhao Zhu
Summary: Endowing Mg alloy surface with superhydrophobicity can effectively solve its poor corrosion resistance and broaden its application fields. A bilayer composite coating composed of microarc oxidation layer and superhydrophobic layer was fabricated to protect Mg alloys, showing excellent water-repellent, self-cleaning properties, and environmental stability. The synergistic barrier protection of microarc oxidation layer and superhydrophobic layer provides effective corrosion protection for Mg alloys in different service environments.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Coatings & Films
Shiyuan Wang, Tong Guo, Gang Xu, Feng Ding
Summary: The corrosion behavior of Zn-Al-Mg pseudo-alloy coatings was studied, revealing the significant influence of Zn content on corrosion mechanism, kinetics, pathway, and products. Selective dissolution was observed due to phase segregation caused by multigalvanic systems. Improved corrosion resistance was observed in both coatings due to the barrier effect of Al-Mg splats and sacrificial protection provided by Zn-rich splats.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Nisa Nashrah, Sung Hun Baek, Young Gun Ko
Summary: This study investigates how the surface topographies of Mg-Al-Zn alloy substrate affect the nucleation and growth behavior of the coating film during the initial stage of plasma electrolytic oxidation (PEO). A single substrate with rough and smooth regions of equal area was prepared by mechanical treatment. The rough region with prominent hills and grooves causes the breakdown of the passive film, leading to an early appearance of plasma discharge and preferential nucleation of the coating film around the hills. However, the coating film grown on the grooves is thicker and more porous compared to that grown on the hills and smooth regions, suggesting a localized growth behavior in the presence of rough regions.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Coatings & Films
Runjia Liu, Yan Liu, Qiwen Yong, Zhi-Hui Xie, Liang Wu, Chuan-Jian Zhong
Summary: The long-term corrosion resistance of conventional micro-arc oxidation (MAO) coatings on magnesium alloy is limited by the inherent micro-scale pores. Zeolitic imidazolate framework-8 (ZIF-8) and zinc gluconate (ZnG) loaded ZIF-8 (ZnG@ZIF-8) were synthesized and incorporated into the MAO coating to enhance the corrosion resistance. The (ZIF-8 + ZnG@ZIF-8)/MAO composite coating showed significant improvement in corrosion protection compared to the blank MAO coating.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Wenxue Fan, Yu Bai, Guoliang Zuo, Yapeng Sima, Hai Hao
Summary: An Al-CeO2-Mg master alloy prepared through a novel direct melt reaction process has been validated as an effective grain refiner for AZ31 Mg alloy, showing promising outcomes for grain refinement.
Article
Materials Science, Multidisciplinary
Lei Yan, Guang-Ling Song, Pengpeng Wu, Yixing Zhu, Dajiang Zheng
Summary: The research showed that increasing the aluminum content in Mg alloys can enhance concrete corrosion performance, but excessive alloying of aluminium can lead to over-protection of steel.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Peng-Peng Wu, Yi-Xing Zhu, Zhen-Liang Feng, Guang-Ling Song, Da-Jiang Zheng
Summary: Surface alloying was used for the first time in this study to fabricate a porous surface precursor of Mg-Al alloys, which could be obtained via chemical etching. The corrosion mechanism was analyzed, showing that the alpha-Mg in the alloyed surface layer was Al-supersaturated and helped to suppress micro galvanic corrosion by forming a uniform surface film. The porous surface had poor corrosion resistance compared with the precursor Mg-Al alloy surface.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Polymer Science
Vladimir S. Egorkin, Dmitry V. Mashtalyar, Andrey S. Gnedenkov, Valeriia S. Filonina, Igor E. Vyaliy, Konstantine V. Nadaraia, Igor M. Imshinetskiy, Evgeny A. Belov, Nikolaj V. Izotov, Sergey L. Sinebryukhov, Sergey V. Gnedenkov
Summary: This paper evaluates the anti-icing properties of samples treated with PEO followed by application of SPTFE and PVDF. The combined PVDF-SPTFE coating shows superior electrochemical characteristics, hydrophobicity, and icephobic properties. The decrease in ice adhesion strength after treatment with PVDF-SPTFE is significant, making it a promising solution for anti-icing applications.
Article
Engineering, Mechanical
Yan Wang, Chuhan Wu, Liangchi Zhang, Peilei Qu, Shanqing Li, Zhenglian Jiang
Summary: The study investigates the effect of thermal oxidation and chemical compositions of oxides on the wear of AZ31B magnesium alloy. Higher temperatures cause thickening of the oxide film layer, emergence of oxide nodules, loss of protective capability, and increased wear rate. The minimum wear rate is found at 200 degrees C while the maximum is at 400 degrees C.
Article
Materials Science, Coatings & Films
Zuo-Jun Jiao, Chang-Yang Li, Yu-Kun Du, Lan-Yue Cui, Xiao-Bo Chen, Yong-Ming Xi, Rong-Chang Zeng
Summary: A novel antibacterial coating was successfully fabricated on a magnesium alloy using a low-temperature water bath treatment. The coating exhibited superior corrosion resistance, antibacterial properties, and osteogenic effects.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qi Chen, W. D. Griffiths
Summary: The addition of Mo into Al melt accelerates the consumption of trapped air bubbles, reducing the impact of double-oxide film defects in aluminum alloy castings. Tensile testing showed an increase in the Weibull modulus of Ultimate Tensile Strength and pct Elongation with Mo addition, suggesting improved mechanical properties. The presence of nitrides within bi-film defects in the alloy suggests that the permeability of nitride layers may play a role in reducing defect size and its impact on mechanical properties.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Materials Science, Coatings & Films
Qingqing Sun, Xiaokai Guo, Fahe Cao
Summary: By using a surface mechanical treatment, the trade-off between strength and corrosion resistance in Al-Mg alloys has been overcome. The treatment resulted in ultrafine grains and the redistribution of Mg element on the surface, leading to a 200% increase in hardness and a 60% decrease in corrosion rate.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Vladislav Deev, Evgeny Prusov, Ernst Ri, Olga Prihodko, Svetlana Smetanyuk, Xizhang Chen, Sergey Konovalov
Summary: The study explores the impact of melt overheating on the crystallization process, microstructure, and mechanical properties of Al-Mg-Si aluminum alloy. Results show that increasing the melt overheating temperature can refine the dendritic cells of the aluminum solid solution and improve the morphology of eutectic inclusions, leading to enhanced mechanical properties.
Article
Materials Science, Multidisciplinary
Bong-Hwan Kim, Seong-Ho Ha, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim, Do-Hyang Kim
Article
Materials Science, Multidisciplinary
Seok-Hoan Jeong, Byung-Jin Kim, Hyun-Kyu Lim, Won-Tae Kim, Do Hyang Kim, Soon-Hyeok Jeon
MATERIALS TRANSACTIONS
(2018)
Article
Materials Science, Multidisciplinary
Seok Hoan Jeong, Yong Joo Kim, Kyung Ho Kong, Tae Hee Cho, Young Kyun Kim, Hyun Kyu Lim, Won Tae Kim, Do Hyang Kim
METALS AND MATERIALS INTERNATIONAL
(2018)
Article
Metallurgy & Metallurgical Engineering
Bong Huang Kim, Majid Seyed Salehi, Ashkan Nouri, Mohammad Sadegh Mohebi, Seong Ho Ha, Young Ok Yoon, Hyun Kyu Lim, Shae K. Kim, B. Ghasem Eisaabadi
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2020)
Article
Materials Science, Multidisciplinary
Junhyub Jeon, Namhyuk Seo, Hwi-Jun Kim, Min-Ha Lee, Hyun-Kyu Lim, Seung Bae Son, Seok-Jae Lee
Summary: An artificial neural network was trained to predict the thermal properties of Fe-based BMGs, with alloy compositions as the input data. The models were used with particle swarm optimization to design BMGs with desired thermal properties. The fabricated alloys were evaluated using X-ray diffraction and differential thermal analysis tests.
Article
Chemistry, Physical
Abdul Wahid Shah, Seong-Ho Ha, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim
Summary: The study explored microstructure modification in Al-6Mg-5Si-0.15Ti alloy by adding Ca and conducting heat treatment, resulting in significant enhancement of mechanical properties. The refined dendritic structure and modified second phases in the modified alloy contributed to its higher tensile strength and elongation compared to the unmodified alloy.
Article
Chemistry, Physical
Kweon-Hoon Choi, Bong-Hwan Kim, Da-Bin Lee, Seung-Yoon Yang, Nam-Seok Kim, Seong-Ho Ha, Young-Ok Yoon, Hyun-Kyu Lim, Shae-Kwang Kim
Summary: The microstructure and corrosion behavior of a novel Al-6Mg alloy were investigated, and it was found that grain size and beta phase precipitation are critical factors influencing the intergranular corrosion behavior of this alloy system.
Article
Chemistry, Physical
Wonseok Yang, Young-Gil Jung, Taeyang Kwak, Shae K. Kim, Hyunkyu Lim, Do-Hyang Kim
Summary: The aim of this study was to develop a new Al-Mg-Si-Zr alloy with a high magnesium content to achieve a wide range of mechanical properties using heat treatment and at a lower cost. The results showed that the mechanical properties of the alloy could be adjusted by utilizing different heat treatment conditions.
Article
Materials Science, Multidisciplinary
Wonseok Yang, Young-Gil Jung, Tae Yang Kwak, Shae K. Kim, Hyunkyu Lim, Do Hyang Kim
Summary: This study aimed to develop a high-strength, low-cost AlMg10ScZr alloy by employing a Powder bed fusion process with appropriate volumetric energy density. The results showed that increasing the volumetric energy density can improve the elongation and ultimate tensile strength of the alloy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Abdul Wahid Shah, Seong-Ho Ha, Jabir Ali Siddique, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim
Summary: The study investigated the effect of varying magnesium levels on the solidification process, microstructure development, tensile properties, and precipitation hardening of Al-Cu-Mg-Ti alloys. The results showed that alloys with different magnesium levels formed different phases during solidification. The alloy with 7% magnesium exhibited the best combination of yield strength and elongation after heat treatment. DSC analysis revealed that the increased tensile strength was associated with the formation of solute clusters and specific phases.
Article
Chemistry, Physical
Abdul Wahid Shah, Seong-Ho Ha, Jabir Ali Siddique, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim
Summary: The aim of this study was to investigate the impact of Si addition on the microstructure, heat treatment response, and mechanical properties of Al-4.5Cu-0.15Ti-3.0Mg alloy. Si addition promoted the precipitation of T phase and the formation of S phase during aging treatment, resulting in an increase in yield and tensile strength of the alloy. The Si-added alloy exhibited superior tensile properties compared to commercially available high-Mg-added Al-Cu-Mg alloys, making it a potential replacement in aerospace and automotive applications.
Proceedings Paper
Materials Science, Multidisciplinary
S. -H Ha, S. -Y Lee, Y. -O Yoon, B. -H Kim, H. -K Lim, S. -K Kim
MATERIALS TODAY-PROCEEDINGS
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Wonseok Yang, Youngkyun Kim, Taeyang Kwak, Shae K. Kim, Hyunkyu Lim, Do Hyang Kim
MAGNESIUM TECHNOLOGY 2017
(2017)
Article
Metallurgy & Metallurgical Engineering
S-H Ha, B-H Kim, Y-O Yoon, H-K Lim, S. K. Kim
ARCHIVES OF METALLURGY AND MATERIALS
(2018)