Article
Chemistry, Physical
Kwangmin Choi, Jaehyuck Shin, Heon Kang
Summary: This study investigated the corrosion behaviors of commercial die-cast Mg alloys with different thicknesses in neutral and alkali solutions. The results showed that decreasing the thickness of a specimen improved its hardness. Specimens with larger eutectic phases were more susceptible to corrosion under neutral conditions but were protected by passivation films in alkaline solution. Fine eutectic phases improved corrosion resistance by forming a net structure that inhibited corrosion propagation. It is suggested that the size and distribution of eutectic phases should be controlled according to the environment.
Article
Chemistry, Physical
Jian Rong, Jia-Ning Zhu, Wenlong Xiao, Xinqing Zhao, Chaoli Ma
Summary: A new Mg-3RE-0.5Zn alloy with high thermal conductivity and acceptable mechanical properties for high pressure die casting has been developed in this study. The combination of superior thermal conductivity and high strength in this alloy is attributed to its unique alloy composition and microstructure. The results of this study will be beneficial for developing new high performance HPDC Mg alloys and promoting their wider application.
Article
Nanoscience & Nanotechnology
Jian Rong, Wenlong Xiao, Yu Fu, Xinqing Zhao, Peng Yan, Chaoli Ma, Ming Chen, Chen Huang
Summary: A high-performance Mg-7Al-3Ca alloy was prepared via high-pressure die casting method, exhibiting high strength, good thermal conductivity, and acceptable heat resistance. The high strength was attributed to various strengthening mechanisms, while the thermal conductivity was maintained due to the presence of Ca.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jian Rong, Wenlong Xiao, Xinqing Zhao, Yu Fu, Haimiao Liao, Chaoli Ma, Ming Chen, Chen Huang
Summary: The study balanced high thermal conductivity and high strength in HPDC Mg alloys with Al addition. Results showed that Al addition improved thermal conductivity and electrical conductivity while enhancing strength and elongation of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jian Rong, Wenlong Xiao, Xinqing Zhao, Chaoli Ma, Haimiao Liao, Donglei He, Ming Chen, Meng Huang, Chen Huang
Summary: With the rapid development of the 3C industries, there is a growing demand for high thermal conductivity magnesium alloys with high mechanical performance. In this study, a high-pressure die casting AZEX4441 alloy with good mechanical properties and high thermal conductivity was developed for ultrathin-walled cellphone components. The alloy exhibited a fine microstructure and higher thermal conductivity compared to traditional alloys.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Chemistry, Physical
Kwangmin Choi, Seungwon Kang, Heon Kang
Summary: The study utilizes the PEO technique to improve the strength and corrosion resistance of magnesium alloys, while also enhancing the fatigue life. It is worth noting that the crack initiation point is at the interface rather than near the interface pores.
Article
Chemistry, Physical
Hua Qian Ang
Summary: The study examines the anelastic deformation resulting from partial twinning reversal in commercial die-cast magnesium alloys at temperatures ranging from room temperature to 150 degrees Celsius. The magnitude of anelastic strain decreases with increasing temperature. Additionally, T5-aged alloys show smaller anelasticity compared to the as-cast alloys, suggesting that precipitates formed during aging may reduce twin-boundary mobility.
Article
Materials Science, Multidisciplinary
Mingzhe Bian, Isao Nakatsugawa, Yusuke Matsuoka, Xinsheng Huang, Yuhki Tsukada, Toshiyuki Koyama, Yasumasa Chino
Summary: The room-temperature stretch formability and corrosion resistance of pure magnesium can be significantly improved by adding trace amounts of copper and calcium. The resulting alloy also exhibits excellent thermal conductivity.
Article
Materials Science, Multidisciplinary
Lingyun Feng, Xixi Dong, Mingxu Xia, Xiangzhen Zhu, Gang Ji, Hailin Yang, Bin Wang, Eric A. Nyberg, Shouxun Ji
Summary: A novel high thermal conductivity (TC) and cost-effective die-cast Mg2.8Al3.8-La0.4Nd alloy with enhanced yield strength (YS) was developed. Compared with the commercially widely used AE44 magnesium alloy, the new alloy exhibited improved TC by 13.5% and enhanced YS through the formation of Al-based intermetallic phases at grain boundaries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Suming Zhu, Trevor B. Abbott, Jian-Feng Nie, Hua Qian Ang, Dong Qiu, Kazuhiro Nogita, Mark A. Easton
Summary: The re-evaluation of magnesium die-casting alloy AE44 with minor Mn addition shows that T5-aged AE44 exhibits a better strength-ductility combination and improved creep resistance. The findings suggest that precipitation hardening of the alpha-Mg matrix plays a more important role than grain boundary reinforcement by intermetallic phases in enhancing the creep resistance of die-cast Mg alloys. These results could open up new application perspectives for AE44, particularly in the automotive industry.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Metallurgy & Metallurgical Engineering
J. P. Weiler
Summary: This paper summarizes the recent work on the measure of manufacturability in the magnesium diecasting industry, focusing on the popular Mg-Al system alloys such as AZ91, AM60, and AM50. It discusses the concept of castability and its relation to the development of innovative applications or improved properties in magnesium die-casting alloys. The paper also provides key findings on castability, how it is defined and evaluated, the influence of alloying elements on castability, and recommendations for future research.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Jung Eun Kim, Ye Jin Kim, Jun Ho Bae, Bong Sun You, Sung Hyuk Park
Summary: This study investigates the microstructural characteristics, tensile properties, and high-cycle fatigue properties of a die-cast Mg-6Al-0.1Mn-0.1Zn-0.3Ca-0.2Y (SEN6) alloy with high corrosion and ignition resistances. The average grain size of the SEN6 alloy is smaller at the surface region compared to the center region due to higher cooling rate. The presence of Ca and Y results in the formation of various particles. The alloy exhibits a tensile yield strength, ultimate tensile strength, elongation, and fatigue limit. Different types of pores act as crack initiation sites during tension and fatigue. The relationship between fatigue limit and ultimate tensile strength is observed in the SEN6 alloy.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Xixi Dong, Lingyun Feng, Shihao Wang, Eric A. Nyberg, Shouxun Ji
Summary: The newly developed die-cast Mg-RE(La,Ce,Nd,Gd)-Al alloy demonstrates good mechanical properties at 300 degrees Celsius, showing higher yield strength and stable stiffness compared to benchmark alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Andrzej Kielbus, Robert Jarosz
Summary: The research successfully improved the existing gating system for engine body casting using the new EV31A magnesium alloy, by conducting casting process simulations and experimental validation. The design modifications effectively addressed potential problems and factors that reduce the casting quality, enabling the implementation of the new alloy in industrial production.
Article
Materials Science, Multidisciplinary
Chunying Wei, Jun Ou, Farzaneh Farhang Mehr, Daan Maijer, Steve Cockcroft, Xu Wang, A. Lateng, Zhi Chen, Zhihua Zhu
Summary: This manuscript introduces a novel method for thermal-stress modelling in die casting process, which can accurately predict various important parameters such as gap, pressure, temperature field, and stress distribution. Compared to previous methods, this new approach provides more precise results and valuable references for defect reduction.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
V. E. Bazhenov, A. V. Petrova, A. V. Sannikov, A. A. Rizhsky, A. Yu. Titov, Yu. V. Tselovalnik, A. V. Koltygin, V. D. Belov, D. Yu. Ozherelkov, I. N. Pashkov
Summary: The critical fraction solid (FScr) required for simulations of misrun formations in castings was obtained for Al-Si alloys. This was done by comparing simulated spiral fluidity test lengths at different FScr values with experimental ones casted into graphite and sand molds. It was found that the FScr and FScoh for Al-Si alloys are very similar, suggesting that FScoh can be used instead of FScr for casting process simulations.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Chemistry, Physical
Mikhail M. Skripalenko, Stanislav O. Rogachev, Boris A. Romantsev, Viacheslav E. Bazhenov, Mikhail N. Skripalenko, Andrei Danilin
Summary: In this study, AA6060 ingots were pierced using different plugs in a screw rolling mill. The results showed that the grain size decreased and the hardness increased after piercing the ingots, with variations depending on the type of plug used.
Article
Materials Science, Multidisciplinary
Dmitriy Yu. Ozherelkov, Ivan A. Pelevin, Anton Yu. Nalivaiko, Stanislav V. Chernyshikhin, Alexander A. Komissarov, Viacheslav E. Bazhenov, Alexander A. Gromov
Summary: The process chain of AlSi10MgCu/Al2O3, from the characterization of feedstock materials to the final properties of samples after SLM, was investigated. The initial AMC powder mixing was performed with a vortex layer system. Comprehensive characterization of the powders after mixing and microstructural features were conducted. Optimal selective laser melting regimes were determined for Al2O3 content and the results demonstrated increased hardness, yield, and tensile strength with similar ductility compared to the initial AlSi10MgCu printed alloy. The study showed the feasibility of using an electromagnetic vortex system for powder preparation and selective laser melting.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
A. V. Koltygin, V. E. Bazhenov, I. V. Plisetskaya, V. A. Bautin, A. I. Bazlov, N. Y. Tabachkova, O. O. Voropaeva, A. A. Komissarov, V. D. Belov
Summary: The study found that the addition of Zr significantly increases the yield strength of the alloy, but also negatively impacts the elongation at fracture. The addition of Mn decreases the corrosion rate of the alloy and improves its fluidity. The best combination of mechanical, casting, and corrosion properties is achieved in alloys containing 2.5wt% Cu and 5wt% Zn.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
A. Koltygin, V. E. Bazhenov, S. A. Tavolzhanskii, S. Matveev, I. Plisetskaya, M. Belov, A. Samokhin, V. D. Belov
Summary: In magnesium alloy castings, shrinkage porosity defects are common and can be repaired using a special filler rod. However, the low consumption of filler rod in Russia has led to a lack of domestic production, relying on imports or low-quality substitutes. Therefore, it is important to study the production technology of filler rod to replace imported materials.
RUSSIAN JOURNAL OF NON-FERROUS METALS
(2022)
Article
Chemistry, Physical
Viacheslav Bazhenov, Anna Li, Stanislav Tavolzhanskii, Andrey Bazlov, Natalia Tabachkova, Andrey Koltygin, Alexander Komissarov, Kwang Seon Shin
Summary: Magnesium alloys are potential materials for temporary fixation devices in osteosynthesis due to their similar density and Young's modulus to cortical bone. In this study, Mg-Zn-Ga-(Y) alloys were prepared by hot extrusion and their microstructure and mechanical properties were investigated. The results showed that the Mg-Zn-Ga-(Y) alloys exhibited favorable mechanical properties and bone regeneration ability.
Article
Materials Science, Ceramics
Vasily A. Bautin, Ruslan A. Rytov, Yulia A. Nalench, Nelly S. Chmelyuk, Irina A. Antoshina, Nikolai A. Usov
Summary: Assemblies of magnetite nanoparticles for magnetic hyperthermia were obtained by ultrasonic mechanocavitation in a viscous liquid. These magnetite nanoparticles retained the perfect crystal structure of the original coarse-grained magnetite powder, with sizes ranging from 0.2-8 μm, and exhibited a high saturation magnetization comparable to pure magnetite. The specific absorption rate (SAR) of the assemblies in an alternating magnetic field showed a significant dependence on nanoparticle concentration and the shape of particle macroaggregates. The SAR of elongated clusters of particles oriented parallel to the action of the magnetic field was found to be 4 times higher than that of quasi-spherical clusters. The SAR of elongated clusters also showed a sharp dependence on the direction of the magnetic field with respect to the cluster orientation axis, as revealed by numerical simulations based on the stochastic Landau-Lifshitz equation.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Stanislav O. Rogachev, Viacheslav E. Bazhenov, Alexander A. Komissarov, Anna V. Li, Denis V. Ten, Viacheslav V. Yushchuk, Alexey Yu. Drobyshev, Kwang Seon Shin
Summary: The effect of hot rolling on the structure and mechanical properties of three Mg-Y-Zn-Mn alloys was investigated by varying process temperature and reduction ratio. Cast WZM111, WZM211, and WZM321 alloys were rolled from an initial thickness of 7 mm to a final thickness of 0.2 mm at temperatures of 400 and 450 degrees C. Characterization of the material was done using optical and scanning electron microscopy, microhardness measurement, and tensile testing. Rolling regimes that achieved a balance between strength and ductility of the alloys were established.
Article
Engineering, Biomedical
Viacheslav Bazhenov, Anna Li, Artem Iliasov, Vasily Bautin, Sofia Plegunova, Andrey Koltygin, Alexander Komissarov, Maxim Abakumov, Nikolay Redko, Kwang Seon Shin
Summary: This study investigates the corrosion rate and biocompatibility of Mg-Zn-Ga-(Y) alloys prepared by hot extrusion. The results show that these alloys have low corrosion rate and good biocompatibility, making them suitable for osteosynthesis implants.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Alexey Drobyshev, Zaira Gurganchova, Nikolay Redko, Alexander Komissarov, Viacheslav Bazhenov, Eugene S. Statnik, Iuliia A. Sadykova, Eugeny Sviridov, Alexey I. Salimon, Alexander M. Korsunsky, Oleg Zayratyants, Denis Ushmarov, Oleg Yanushevich
Summary: In this study, pins made from the novel Mg-2Zn-2Ga alloy were placed in the femoral bones of six Wistar rats. The level of bioresorption was evaluated after 1, 3, and 6 months using radiography, histology, SEM, and EDX. Significant bioresorption was observed after 3 months, and complete dissolution of the pins occurred at 6 months. No gas cavities were found at the pin installation sites throughout the postoperative period. The animals showed no signs of inflammation or toxicity in their blood parameters. These findings are encouraging for further research involving a larger number of animals and testing in other species.
BIOENGINEERING-BASEL
(2023)
Article
Metallurgy & Metallurgical Engineering
A. S. Anishchenko, A. Koltygin, V. E. Bazhenov
Summary: This study investigates the effect of zinc on the freezing range, phase composition, and mechanical properties of a high-temperature Mg-Nd-Y-Zn-Zr alloy (ML19). The results show that the addition of 0.5 wt % zinc has little influence on the hardness, ultimate tensile strength, and yield strength of the alloy, but significantly improves the elongation at fracture.
RUSSIAN METALLURGY
(2022)
Article
Multidisciplinary Sciences
R. A. Rytov, V. A. Bautin, N. A. Usov
Summary: The research demonstrates that optimal thermal distribution can be achieved in magnetic hyperthermia through a linear combination of spherically symmetric heat sources, and shows the advantage of spherical magnetic nanocapsules in this field. Numerical simulations suggest that by optimizing the size and structure of the capsules, the interaction between nanoparticles can be minimized, leading to high SAR values.
SCIENTIFIC REPORTS
(2022)
