Article
Materials Science, Multidisciplinary
R. Reyes-Riverol, M. Lieblich, S. Fajardo
Summary: The corrosion resistance and anomalous hydrogen evolution of extruded cast and powder metallurgical Mg1Zn alloy were investigated. The results showed that the powder metallurgical alloy exhibited active corrosion at the open circuit potential, while the cast alloy remained passivated. The cast alloy had lower hydrogen evolution rates and higher Rp values compared to the powder metallurgical alloy. The majority of the charge ratio associated with anomalous hydrogen evolution was observed in the powder metallurgical alloy.
Article
Chemistry, Physical
Xuejian Wang, Zongning Chen, Enyu Guo, Xueqin Liu, Huijun Kang, Tongmin Wang
Summary: The addition of Ga element was found to enhance the corrosion resistance and tensile strength of Mg-5Sn alloy, with the maximum elongation to fracture achieved in Mg-5Sn-1Ga alloy. The precipitation of Mg5Ga2 particles and the formation of more stable corrosion products were observed with increasing Ga content in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Peixu Yang, Songbo Ye, Baojing Feng, Jinhui Liu, Sensen Huang, Guonan Liu, Weidong Zhang, Weineng Tang, Shijie Zhu, Shaojun Zhang
Summary: The study found that the Mg2Ca phase acts as a microanode in microgalvanic corrosion in both NaCl and Na2SO4 solutions, accelerating corrosion of the adjacent Mg matrix, while Cl- and SO42- have different sensibilities to microgalvanic corrosion.
Article
Materials Science, Multidisciplinary
Jianwei Dai, Qiangsheng Dong, Yujin Nie, Yongqiang Jia, Chenglin Chu, Xiaobo Zhang
Summary: The microstructures, mechanical properties, and corrosion behaviors of Mg-4Gd-xY-1Zn-0.5Ca-1Zr (x = 1, 3, and 5 wt.%) alloys under as-cast condition were investigated. It was found that Y addition significantly improved the yield strength and corrosion resistance of the alloys.
MATERIALS & DESIGN
(2022)
Article
Metallurgy & Metallurgical Engineering
Mehrab Lotfpour, Changiz Dehghanian, Massoud Emamy, Ahmad Bahmani, Mehdi Malekan, Ahmad Saadati, Milad Taghizadeh, Mohammadreza Shokouhimehr
Summary: In this study, a new biodegradable Mg-Zn-Cu magnesium alloy was introduced for biological applications. Addition of 0.1wt.% Cu was found to enhance corrosion resistance, with extruded alloys displaying better corrosion resistance behavior compared to cast alloys. The Mg-2Zn-0.1Cu alloy was identified as a potential candidate for use as a biodegradable magnesium implant due to its improved tensile properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Metallurgy & Metallurgical Engineering
Lara Moreno, Endzhe Matykina, Kiryl A. Yasakau, Carsten Blawert, Raul Arrabal, Marta Mohedano
Summary: The present study aims to evaluate the effect of alloy processing and composition, pH control, and testing medium on the corrosion performance of Mg-Zn-Ca systems for biodegradable implants. Various microscopic methods were used to analyze the grain size and secondary phases. The corrosion performance of the alloys was evaluated using electrochemical and hydrogen evolution methods. The pH control was achieved through daily solution replacement and CO2 flow.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Cong Wang
Summary: This study investigates the evolution of microstructure and hardness of the Al 7075/Mg EW75 composite through experiments and numerical simulations. The results reveal that the thickness of the interface increases slowly and then sharply during solution heat treatment. The high quenching rate leads to plastic deformation and cracks in the intermetallic layer, and the T6 heat treatment proves to be more effective in strengthening the composite.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Donglei He, Hao Gong, Ziyue Zhang, Yang Zheng, Hu Zhang, Yan Li
Summary: The in-vitro corrosion behaviors of extruded Mg-xGa (x = 1, 3, 5) alloys in alpha minimum essential medium (alpha-MEM) were investigated. The bilayer corrosion film was composed of an outer layer dominated by amorphous phosphates-carbonates and an inner layer dominated by MgO-Mg(OH)(2). Pure Mg and Mg-1Ga exhibited low corrosion rates and homogeneous corrosion behaviors owing to the protection from the compact corrosion films. By contrast, Mg-3Ga and Mg-5Ga exhibited high corrosion rates and inhomogeneous corrosion behaviors owing to the bulky micro-galvanic corrosion caused by Mg5Ga2. Based on these results, possible corrosion models were developed.
Article
Crystallography
Daria Palgan, Anna Dobkowska, Aleksandra Zielinska, Daria Drozdenko, Kristian Mathis, Wojciech Swieszkowski
Summary: The corrosion performance of Mg-LPSO alloys was found to be related to both the volume and distribution of LPSO structures in the alloy. Pitting was identified as the main corrosion mechanism in chloride-containing solutions, with microgalvanic corrosion accelerated by increasing chloride concentration.
Article
Materials Science, Multidisciplinary
Soo-Min Baek, Si-Young Lee, Jong Chan Kim, Jaeho Kwon, Hoseok Jung, Sooseok Lee, Ki-Suk Lee, Sung Soo Park
Summary: The corrosion resistance of conventional and experimental Mg-3Al-1Zn-based alloys with different Mn and Y content was compared. The experimental Mg-3Al-1Zn-0.05Mn-0.03Y alloy exhibited a corrosion rate of 0.91 mm y(-1), about four times slower than that of a conventional Mg-3Al-1Zn-0.3Mn alloy, highlighting the importance of trace additions of Mn and Y in improving corrosion resistance.
Article
Materials Science, Multidisciplinary
Zi-Ren Xie, Cheng Zhang, Hu-Cheng Pan, Yu-Xin Wang, Yu-Ping Ren, Gao-Wu Qin
Summary: Electrochemical and immersion tests were conducted to characterize the bio-corrosion resistance of as-extruded Mg-Ca binary alloys with submicron grain size. The microstructures were further characterized by optical microscopy (OM), scanning electronic microscopy and transmission electron microscope (TEM). The Mg-2Ca alloy extruded at 300 degrees C (2Ca-300) exhibits the lowest current density of 1.683 mA·cm-2 and corrosion rate of 22.14 g·m-2·day-1 in simulated body fluid, which is comparable with that of pure Mg. Ca addition can reduce grain size of as-extruded Mg alloy and decrease the corrosion rate. The formed Mg2Ca phases would accelerate the local galvanic corrosion and protect the alpha-Mg matrix simultaneously due to the lower electrode potential. The lower defect density, finer grain size, and weaker basal texture intensity contribute to the excellent bi-corrosion resistance of the 2Ca-300 alloy.
Article
Metallurgy & Metallurgical Engineering
Rania E. E. Hammam, Soha A. A. Abdel-Gawad, Mohamed E. E. Moussa, Madiha Shoeib, Shimaa El-Hadad
Summary: The aim of this research was to investigate the microstructure and corrosion behavior of Zn-0.5Al-xMg cast alloys with different Mg additions in simulated body fluid (SBF). The results showed that adding Mg greatly influenced the microstructure of the Zn-based alloys where the degree of fineness increased with a rise in the Mg content. The Zn-0.5Al-0.6Mg alloy exhibited the lowest degradation rate and met the requirements for biodegradable bone implants.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Chemistry, Physical
S. X. Pan, J. Zhang, X. J. Zhou, R. S. Jin, J. H. He, J. N. Chen, X. Z. Lu, X. M. Chen
Summary: The compositions, microstructures, and hydrogen storage properties of Mg-9.1Y-1.8Zn alloys in three different states were investigated. The results showed that the alloys were composed of Mg and long-period stacking ordered (LPSO) phases. LPSO phases broke and decomposed after hydrogenation, forming in-situ YH1.8 to YH2.3 nano-hydrides. These nano-hydrides acted as in-situ catalysts, improving the hydrogen storage properties of the alloys. The swaged alloy exhibited the largest hydrogen storage capacity and excellent hydrogen sorption kinetics compared to the other states of alloys.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Jianhua Chen, Weiying Huang, Bing Liu, Hiromi Nagaumi, Xuyue Yang
Summary: In this study, the creep behaviors of dilute Mg-Mn-Zn alloys with bimodal and homogeneous grain microstructures were investigated. The samples exhibited different types of dislocation slip and creep mechanisms depending on the direction of loading. The bimodal grain microstructure accelerated creep and resulted in inferior creep resistance compared to the homogeneous microstructure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Chaoneng Dai, Sanlue Pei, Kai Ma, Ye Wang, Danqian Wang, Jinxing Wang, Yanlong Ma, Jingfeng Wang
Summary: The effects of Er and Ni content on the microstructure evolution and corrosion mechanism of Mg-Er-Ni alloys were investigated. It was found that the corrosion rate of the alloy increases in the extrusion direction with the increase of Er and Ni content, while it decreases in the transverse direction. The alloy exhibited soluble and corrosion-resistant mechanisms in different orientations.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
