Journal of Magnesium and Alloys最新文献

{"title":"Versatile techniques based on the Thermionic Vacuum Arc (TVA) and laser-induced TVA methods for Mg/Mg:X thin films deposition-A review","authors":"","doi":"10.1016/j.jma.2024.08.012","DOIUrl":"10.1016/j.jma.2024.08.012","url":null,"abstract":"<div><div>Magnesium and magnesium thin alloy films were deposited using a thermionic vacuum arc (TVA), which has multiple applications in the field of metallic electrodes for diodes and batteries or active corrosion protection. An improved laser-induced TVA (LTVA) method favors the crystallization processes of the deposited magnesium-based films because the interaction between laser and plasma discharge changes the thermal energy during photonic processes due to the local temperature variation. Plasma diagnosis based on current discharge measurements suggests an inelastic collision between the laser beam and the atoms from the plasma discharge. The morphology and surface properties of the obtained thin films differ between these two methods. While the amorphous character is dominant for TVA thin films, enabling a smooth surface, the LTVA method produces rough surfaces with prominent crystallinity, less hydrophobic character and lower surface energy. The smooth surfaces obtained by the TVA methods produce metallic electrodes with good electrical contact, ensuring better diodes and battery charge transport. Both methods allow uniform magnesium alloys to be obtained, but the laser used in the LTVA on the discharge plasma controls the added metal or element ratio.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956724002809/pdfft?md5=e24d73ea685029ea892d9500e0710a69&pid=1-s2.0-S2213956724002809-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shortening the manufacturing process of degradable magnesium alloy minitube for vascular stents by introducing cyclic extrusion compression","authors":"","doi":"10.1016/j.jma.2023.01.005","DOIUrl":"10.1016/j.jma.2023.01.005","url":null,"abstract":"<div><div>Due to its excellent biocompatibility and biodegradability, Mg and its alloys are considered to be promising materials for manufacturing of vascular sent. However, the manufacture of high-precision and high-performance Mg alloys minitubes is still a worldwide problem with a long manufacturing processing caused by the poor workability of Mg alloys. To solve this problem, the cyclic extrusion compression (CEC) was used to pretreat the billet by improving the workability of Mg alloys, finally shortening the manufacturing process. After CEC treatment, the size of grains and second phase particles of Mg alloys were dramatically refined to 3.2 µm and 0.3 µm, respectively. Only after three passes of cold drawing, the wall thickness of minitube was reduced from 0.200 mm to 0.135 mm and a length was more than 1000 mm. The error of wall thickness was measured to be less than 0.01 mm, implying a high dimensional accuracy. The yield strength (YS), ultimate tensile strength (UTS) and elongation of finished minitube were 220±10 MPa, 290±10 MPa and 22.0 ± 0.5%, respectively. In addition, annealing can improve mechanical property and corrosion resistance of minitubes by improving the homogeneity of the microstructure and enhancing the density of basal texture.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956723000312/pdfft?md5=58fa825e82604688fb31ce2f35d75438&pid=1-s2.0-S2213956723000312-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49099708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure evolution and enhanced fatigue behavior in the Mg-10Li-5Zn-0.5Er alloys micro-alloyed with Yb","authors":"","doi":"10.1016/j.jma.2022.07.017","DOIUrl":"10.1016/j.jma.2022.07.017","url":null,"abstract":"<div><div>In this paper, (0.2–1 wt%) Yb was added to improve the tensile properties and high-cycle fatigue behavior of the as-cast and as-extruded Mg-10Li-5Zn-0.5Er alloys. It is found that Yb mainly affects the mechanical properties of the alloy by changing the grain size, type and morphology of the second phases. Yb mainly exists in the formation of Mg₂Yb and Mg-Zn-Yb phases in the metallographic structure. With the addition of Yb, the grains are refined and these Yb-containing phases replace the large-sized MgLiZn phase to be enriched at the grain boundaries. While the addition of excess Yb reduces the number of small-sized MgLiZn phases in the grain, thus reducing the alloys’ mechanical performance. After extrusion, the small-sized MgLiZn phase is refined and the number increases, which effectively improves the tensile and fatigue strength of the alloy. The fatigue strength is mainly affected by the number and morphology of the second phase, positively correlated with the strength. Balanced in grain size and number and size of second phases, the extruded alloy with 0.2Yb added exhibits excellent mechanical properties with the yield strength, ultimate tensile strength and elongation of 292 MPa, 303 MPa and 11.7%, and an fatigue strength of 130 MPa.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956722001852/pdfft?md5=301a61b3273d32d87afbf111694e6a09&pid=1-s2.0-S2213956722001852-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48993475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hot tearing behavior of AZ91D magnesium alloy","authors":"","doi":"10.1016/j.jma.2023.02.010","DOIUrl":"10.1016/j.jma.2023.02.010","url":null,"abstract":"<div><div>Hot tearing is a serious destructive solidification defect of magnesium alloys and other casting metals. Quantitative and controllable measurements on the thermal and the mechanical behavior of an alloy during its solidification process are crucial for the understanding of hot tearing formation. We developed a new experimental method and setup to characterize hot tearing behavior via controlled cooling and active loading to force hot hearing formation on cooling at selected fractions of solid. The experimental setup was fully instrumented so that stress, strain, strain rate, and temperature can be measured in-situ while hot tearing was developing. An AZ91D magnesium alloy, which is prone to hot tearing, was used in this study. Results indicate that when hot hearing occurred, the local temperature, critical stress, and cumulative strain were directly affected by strain rate. Depending on the applied strain rate, hot tearing of the AZ91D magnesium alloy could occur in two solidification stages: one in the dendrite solidification stage (<em>f_S</em> ∼ 0.81–0.82) and the other in the eutectic solidification stage (<em>f_S</em> ∼ 0.99). AZ91D alloy exhibited distinct mechanical behaviors in these two ranges of fraction solid.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956723000634/pdfft?md5=5994758c8e11dfad5b9fa26deede4df2&pid=1-s2.0-S2213956723000634-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46299130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mg-Ti hybrid joints: Surface modification, corrosion studies and 3D-pore investigation using synchrotron-based microtomography","authors":"","doi":"10.1016/j.jma.2024.08.014","DOIUrl":"10.1016/j.jma.2024.08.014","url":null,"abstract":"<div><div>A new direction toward the future of orthopedic implants is to combine biodegradable Mg alloys with permanent Ti to produce selectively biodegradable hybrid joints for advanced tissue engineering. However, the strong galvanic corrosion between Mg and Ti is a major issue to be considered. This work aims to explore plasma electrolytic oxidation (PEO) as a single-step coating treatment to allow for an acceptable degradation behavior of MgTi hybrid systems. To this end, MgTi hybrid joints were produced through the heat treatment of Mg-0.6Ca and commercially pure Ti specimens at 640 °C for 8 h. A single-step PEO treatment was then employed to create a protective layer on the surface of hybrid couples. Even though the scanning electron microscopy (SEM) images showed only a porosity of 6% and 12% within the PEO layers on single Mg and MgTi couples, 3D investigation of the synchrotron-based microtomography data demonstrated a porosity of 18% and 30% with a considerable number of interconnected pores. According to the electrochemical impedance spectroscopy measurements, the impedance modulus at all frequencies on coated MgTi coupled specimens was lower than that on the coated single Mg-0.6Ca and pure Ti. However, the application of PEO treatment significantly decreased the strong galvanic degradation of Mg-0.6Ca in contact with Ti. The results of hydrogen evolution tests revealed that PEO-treated MgTi couples showed a similar degradation behavior as the single alloy during the first day of immersion.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956724002901/pdfft?md5=70b0e35ef8dd354b86e1c68cf0aa98ee&pid=1-s2.0-S2213956724002901-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnesium-based biomaterials for coordinated tissue repair: A comprehensive overview of design strategies, advantages, and challenges","authors":"","doi":"10.1016/j.jma.2024.05.028","DOIUrl":"10.1016/j.jma.2024.05.028","url":null,"abstract":"<div><div>Magnesium-based biomaterials (MBMs) are one of the most promising materials for tissue engineering due to their unique mechanical properties and excellent functional properties. This review describes the development, advantages, and challenges of MBMs for biomedical applications, especially for tissue repair and regeneration. The history of the use of MBMs from the beginning of the 20th century is traced, and the transformative advances in contemporary applications of MBMs in areas such as orthopedics and cardiovascular surgery are emphasized. The review also provides insight into the signaling pathways affected by MBMs, such as the PI3K/Akt and RANKL/RANK/OPG pathways, which are critical for osteogenesis and angiogenesis. The review advocates that future research should focus on optimizing alloy compositions, surface modification and exploring innovative technologies such as 3D printing to improve the efficacy of MBMs in complex tissue repair. The potential of MBMs to tissue engineering and regenerative medicine is significant, urging further exploration and interdisciplinary collaboration to maximize their therapeutic effects.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956724001993/pdfft?md5=f070b7d0ef13d5c2f031fe27fd80478e&pid=1-s2.0-S2213956724001993-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Well-oriented magnesium hydroxide nanoplatelets coating with high corrosion resistance and osteogenesis on magnesium alloy","authors":"","doi":"10.1016/j.jma.2023.02.002","DOIUrl":"10.1016/j.jma.2023.02.002","url":null,"abstract":"<div><div>Magnesium alloys are nontoxic and promising as orthopedic metallic implants, but preparing a biocompatible Mg(OH)₂ layer with high corrosion protection ability remains challenging. It is generally believed that the Mg(OH)₂ layer, especially that formed in a natural condition, cannot provide desirable corrosion resistance in the community of corrosion and protection. Here, several Mg(OH)₂ coatings were prepared by changing the pH values of sodium hydroxide solutions. These coatings were composed of innumerable nanoplatelets with different orientations and showed distinguished capability in corrosion resistance. The nanoplatelets were well-oriented with their ab-planes parallel to, instead of perpendicular to, the magnesium alloy surface by raising the pH value to 14.0. This specific orientation resulted in the optimal coating showing long-term corrosion protection in both <em>in vitro</em> and <em>in vivo</em> environments and good osteogenic capability. These finds manifest that the environment-friendly Mg(OH)₂ coating can also provide comparable and better corrosion protection than many traditional chemical conversion films (such as phosphate, and fluoride).</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956723000257/pdfft?md5=e78e20bcd9c09fdf3318f6ba582cd3bb&pid=1-s2.0-S2213956723000257-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48437540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Promoting dynamic recrystallization and improving strength and ductility of Mg–7Bi alloy through Al addition","authors":"","doi":"10.1016/j.jma.2024.07.020","DOIUrl":"10.1016/j.jma.2024.07.020","url":null,"abstract":"<div><div>This study investigated the influence of the addition of Al to a Mg–7Bi (B7, wt%) alloy, particularly its recrystallization behavior during extrusion and its resulting mechanical properties. The addition of 2 wt% Al to the B7 alloy resulted in a lower grain size, a reduction in the number density of fine Mg₃Bi₂ particles, and a higher area fraction of relatively coarse Mg₃Bi₂ particles in the extrusion billet. These microstructural changes increased the nucleation sites for recrystallization, reduced the Zener pinning effect, and enhanced particle-stimulated nucleation, all of which promoted dynamic recrystallization behavior during extrusion. As a result, the area fraction of recrystallized grains in the extruded alloy increased from 77 % to 94 %. The extruded B7 alloy exhibited a strong &lt;10-10&gt; fiber texture, whereas the extruded Mg–7Bi–2Al (BA72) alloy had a weak &lt;10-10&gt;–&lt;2-1-10&gt; texture, which was attributed to the minimal presence of unrecrystallized grains and the dispersed orientation of the recrystallized grains. The tensile yield strength (TYS) of the extruded BA72 alloy was higher than that of the extruded B7 alloy (170 and 124 MPa, respectively), which resulted from the enhanced grain-boundary and solid-solution strengthening effects. The tensile elongation (EL) of the BA72 alloy also exceeded that of the B7 alloy (20.3 % and 6.1 %, respectively), the result of the uniform formation of fine twins under tension in the former and the formation of a few coarse twins among the unrecrystallized grains in the latter. Consequently, the addition of a small amount of Al to the B7 alloy significantly improved both the strength and ductility of the extruded alloy, resulting in a remarkable increase in the product of the TYS and EL from 756 to 3451 MPa% and expanding its potential range of applications as a lightweight extruded structural component.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956724002731/pdfft?md5=ca857a497ec5690fb83d61500f10218b&pid=1-s2.0-S2213956724002731-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A non-nucleophilic electrolyte based on all-inorganic salts with conditioning-free characteristic for rechargeable magnesium batteries","authors":"","doi":"10.1016/j.jma.2023.06.007","DOIUrl":"10.1016/j.jma.2023.06.007","url":null,"abstract":"<div><div>Conditioning-free electrolytes with high reversibility of Mg plating/stripping are of vital importance for the commercialization of the superior rechargeable magnesium batteries (RMBs). In the present work, a non-nucleophilic electrolyte (denoted as MLCH) based on all-inorganic salts of MgCl₂, LiCl and CrCl₃ for RMBs is prepared by a straightforward one-step reaction. As a result, the MLCH electrolyte shows the noticeable performance of high ionic conductivity (3.40 mS cm⁻¹), low overpotential (∼46 mV <em>vs</em> Mg/Mg²⁺), high Coulombic efficiency (∼93%), high anodic stability (SS, ∼2.56 V <em>vs</em> Mg/Mg²⁺) and long-term (more than 500 h) cycling stability, especially the conditioning-free characteristic. The main equilibrium species in the MLCH electrolyte are confirmed to be the tetracoordinated anions of [LiCl₂(THF)₂]⁻ and solvated dimers of [Mg₂(µ-Cl)₃(THF)₆]⁺. The addition of LiCl can assist the dissolution of MgCl₂ and activation of the electrode/electrolyte interface, resulting in a superior Mg plating/stripping efficiency. The synergistic effect of LiCl, CrCl₃, a small amount of HpMS and the absence of polymerization THF enable the conditioning-free characteristic of the MLCH electrolyte. Moreover, the MLCH electrolyte exhibits decent compatibility with the cathodic materials of CuS. The Mg/CuS full cell using the MLCH electrolyte presents a discharge specific capacity of 215 mAh g⁻¹ at 0.1 C and the capacity can retain ∼72% after 40 cycles. Notably, the MLCH electrolyte has other superiorities such as the broad sources of materials, low-cost and easy-preparation, leading to the potential prospect of commercial application.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956723001317/pdfft?md5=37987d472cd94fd7d2f694ee14a9b521&pid=1-s2.0-S2213956723001317-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45797297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of cooling rate on the microstructure and properties of magnesium alloy-a review","authors":"","doi":"10.1016/j.jma.2024.06.021","DOIUrl":"10.1016/j.jma.2024.06.021","url":null,"abstract":"<div><div>Magnesium alloy is one of the most widely used lightweight structural materials, and the development of high strength-toughness magnesium alloy is an important research field at present and even in the future. The preparation process parameters of magnesium alloy directly affect the microstructure of the magnesium alloy, and then determine the properties of the magnesium alloy. The cooling rate has important effects on the microstructure and properties of the magnesium alloy, and is an important preparation process parameter that cannot be ignored. Both the cooling rate from liquid phase to solid phase and the cooling rate of the magnesium alloy after heat treatment will change the microstructure of the magnesium alloy. Furthermore, the properties of magnesium alloy will be affected. In this paper, the effects of cooling rate on the solidification behavior, the rheological behavior, the change of microstructure (the solid solution of alloying elements in matrix, the composition, size, distribution and morphology of second phase, the diffusion and segregation of alloying elements, the grain size, the formation and morphology of dendrite, etc.), and the effects of cooling rate of magnesium alloy after heat treatment on the microstructure and stress distribution are reviewed. The reasons for the divergence about the influence of cooling rate on the microstructure of magnesium alloy are analyzed in detail. The effects of cooling rate on the mechanical properties, corrosion resistance and oxidation resistance of magnesium alloy are also analyzed and discussed deeply. Finally, the new methods and approaches to study the effects of cooling rate on the microstructure and properties of magnesium alloy are prospected.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":null,"pages":null},"PeriodicalIF":15.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213956724002287/pdfft?md5=e6c7e82433597dde2e8ef39191c734d4&pid=1-s2.0-S2213956724002287-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141696279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}