Article
Nanoscience & Nanotechnology
Umer Masood Chaudry, Yeonju Noh, Gukin Han, Russlan Jaafreh, Tea-Sung Jun, Kotiba Hamad
Summary: This study investigates the effects of CaO additions on the microstructure, texture, and mechanical properties of AZ61 magnesium alloy. The addition of CaO leads to the formation of Ca-rich intermetallic compounds and influences the evolution of the alloy's structure. Additionally, the alloys containing CaO exhibit twined structures, with an increased fraction of tension twins as the amount of CaO increases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Zhiyuan Feng, Charles C. Xu, Dadi Zhang, Rudolph Buchheit
Summary: The study showed that the corrosion resistance of AZ31 Mg alloy was significantly improved after coating treatment with 5 mM or 10 mM sodium selenite, with the protection mechanism attributed to the transformation of selenite to insoluble selenium, the formation of insoluble MgSeO3 hydrate, and the polymerization of amorphous selenium.
Article
Chemistry, Physical
Qian Su, Rongrong Wang, Tao Li, Yejin Han, Lianxi Hu, Jixue Zhou, Guochen Zhao, Xin Wang, Huan Yu
Summary: This study investigates the thermal stability and hardness evolution of nanocrystalline AZ61Mg-Ti magnesium matrix composite. The results show that after annealing, AZ61Mg-Ti has smaller grain size with uniformly distributed Ti particles and nano scale Ti3Al particles in the magnesium matrix. The kinetics of grain growth follows a generalized parabolic model, and the drag effect and pinning effect contribute to the improved thermal stability. Additionally, the annealed AZ61Mg-Ti exhibits higher hardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Zheng Shao, Masashi Nishimoto, Izumi Muto, Yu Sugawara
Summary: In situ observations were conducted on the filiform corrosion process of die-cast AZ91D magnesium alloy in 0.1 and 0.01 M NaCl solutions (pH 8.0) using a microscale polarization technique. The morphology changes were monitored in real-time through an optical microscope, revealing that filiform corrosion mainly occurred in lamellar alpha + beta structures adjacent to beta phases, with the beta phases remaining intact after corrosion.
Article
Materials Science, Multidisciplinary
Qi Zou, Qichi Le, Liang Ren, Chunyan Ban, Chenglu Hu, Yunchang Xin, Qing Liu, Wenyi Hu, Songhua Chen, Andrej Atrens
Summary: The corrosion behavior of Nd alloyed magnesium alloy AZ80 in three simulated concrete pore solutions (SCPs) was investigated. The composition and pH value of the SCPs were found to have an effect on the corrosion properties of AZ80 and AZ80-1.0Nd. Corrosion mainly occurred in the form of localized corrosion along the transverse direction in the SCP solutions. AZ80 and AZ80-1.0Nd showed the best corrosion resistance in the SCP2 solution due to the formation of a dense protective film. AA6061 corroded severely in the SCP1 solution and suffered less corrosion in the SCP2 and SCP3 solutions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Electrochemistry
Vigneshkumar Murugesan, Ashoka Varthanan Perumal
Summary: An epoxy/PANI coating with 7% polyaniline powder deposited by electrostatic deposition is proposed to enhance the corrosion resistance of AZ61 magnesium alloys. The coating thickness is varied, and the results show that the corrosion resistance increases with coating thickness. The superior corrosion resistance of the epoxy/PANI coating is attributed to its physical insulation and suppression of magnesium dissolution.
Article
Energy & Fuels
Song-Jeng Huang, Matoke Peter Mose
Summary: The impact of ball milling on the hydrogen storage capabilities of AZ61 magnesium alloys was investigated in this study, with a focus on understanding the underlying structure-property relationships. The structure of the AZ61 alloy was analyzed using x-ray diffraction, particle size, morphology, and Sievert's analysis. The results showed that ball milling changed the morphology and decreased the particle size of the powder samples, leading to an improvement in hydrogen storage performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Electrochemistry
Jiaqiang Li, Qilong Han, Yibo Zou, Zexin Yu, Gangxian Zhu, Wei Xu, Shihong Shi
Summary: The corrosion behavior and transpassive dissolution properties of TC4 alloy produced by additive manufacturing technology were investigated in different NaCl concentrations. The corrosion resistance exhibited non-linear characteristics and the passive film on the surface decreased with increasing NaCl concentrations.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Baojie Wang, Jiyu Hou, Jiyu Luan, Daokui Xu, Haijing Sun, Jie Sun
Summary: By conducting experiments, it was found that the corrosion behaviors of Mg-8%Li alloy varied significantly in NaCl solutions with different concentrations. The hydrogen evolution rate in the 0.9 wt.% NaCl solution was higher compared to the 3.5 wt.% NaCl solution, and the localized corrosion was weaker and mainly occurred in the alpha-Mg phase.
Article
Metallurgy & Metallurgical Engineering
Weiyi Zhang, Yunhui Du, Peng Zhang
Summary: In this study, an ordinal discharge (OD) mode of plasma electrolytic oxidation (PEO) coating was developed to weaken the eruption of breakdown melt and improve the performance of the coating. By adjusting the mass ratio and voltage, the inner dense layer of the coating was thickened while the outer loose layer was densified, leading to enhanced corrosion resistance and reduced wear rate.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
L. Prince, M-A. Rousseau, X. Noirfalise, L. Dangreau, L. B. Coelho, M. -G. Olivier
Summary: This study investigated the effect of carbonate ions on the corrosion protection of AZ31 magnesium alloy, highlighting the inhibitive effect of CO32- ions and discussing the underlying mechanisms. Multiple techniques including EIS, potentiodynamic polarization measurements, hydrogen evolution tests, SEM-EDX analysis, and XPS were used to analyze the corrosion behavior.
Article
Nanoscience & Nanotechnology
Chunyu Wang, Yuxiu Zhang, Qinghuan Huo, Zhirou Zhang, Jiao Tang, Aki Hashimoto, Xuyue Yang
Summary: This study investigated the effects of twinning time node on the creep resistance of an extruded Mg-2wt%Y sheet. Pre-compression with a low strain before creep resulted in a large amount of {10 (1) over bar2} twins, impacting the creep resistance of the samples. The dominant creep mechanisms differed between samples with and without pre-compression, with the presence of twins affecting the creep rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Zhao-Yuan Meng, Cheng Wang, Zhen-Ming Hua, Min Zha, Hui-Yuan Wang
Summary: Through achieving extraordinary fine-grain thermal stability under high-temperature solid-solution treatment, the dilute Mg alloy exhibits fine-grained structure and impressive mechanical properties, highlighting the importance of high-temperature solid-solution in developing high-strength alloys.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Bo Jiang, Dongdong Zhang, Hong Xu, Yongbing Liu, Zhanyi Cao, Xiaohong Yang
Summary: Through electropulsing current-assisted tension, the ductility of an extruded AZ61 magnesium alloy tube was significantly improved, accompanied by the emergence of serrated flow phenomenon. Electropulsing also reduced the tendency of twinning in the alloy, although twinning fraction may depend on the electropulsing frequency.
Article
Chemistry, Physical
Yusuke Matsuoka, Mingzhe Bian, Xinsheng Huang, Yuhki Tsukada, Toshiyuki Koyama, Yasumasa Chino
Summary: The relationship between Zn content and room temperature mechanical properties of dilute Mg-xZn-0.1Ca alloy sheets was investigated. Increasing the Zn content resulted in a significant improvement in the formability. The relative activity of deformation modes did not show apparent differences between different Zn contents. The appearance of tilted basal poles and the development of TD-split texture contributed to the enhanced formability. The efficient scheme for parameter fitting required for VPSC simulation was proposed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
