Journal of Magnesium and Alloys最新文献

{"title":"Hybrid surface layers with antibacterial and anti-inflammatory activity for implants materials","authors":"Mariia A. Piatkova, Konstantine V. Nadaraia, Arina I. Ponomarenko, Igor V. Manzhulo, Mariia S. Gerasimenko, Arina I. Pleshkova, Evgeny A. Belov, Igor M. Imshinetskiy, Ksenia A. Fomenko, Ivan S. Osmushko, Aleksey G. Kozlov, Sergey V. Gnedenkov, Dmitry V. Mashtalyar","doi":"10.1016/j.jma.2025.04.014","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.014","url":null,"abstract":"Currently, there is an essential need for bioresorbable bone implants with antibacterial, anti-inflammatory properties as well as osteoinductivity. Considering this, in presented study for the first time hybrid Mg-ZK coatings with polydopamine (PDA), menaquinone-7 (MK-7), zoledronate (ZA) and vancomycin on the hydroxyapatite (HA) containing layer are formed. Porous coatings were obtained by the plasma electrolytic oxidation (PEO) on an Mg alloy, then MK-7 was impregnated into the pores and PDA film with ZA and vancomycin was polymerized on the samples surface. The presence of HA and organic bioactive compounds was confirmed by EDS, Raman spectroscopy, XRD and XPS. Surface free energy values of hybrid coatings are close to optimal for cell adhesion: 75.28±1.35 mJ/m². Viability tests of the medium, in which Mg-ZK implants were soaked, revealed cytotoxic activity on human osteosarcoma cells with no such an effect on fibroblasts. Antibacterial tests showed an inhibition zone on S. aureus with no viable colonies on the hybrid coatings. The growth inhibition zones for the samples with the hybrid coating were 21±1 mm. Data of electrochemical impedance spectroscopy shows increase of corrosion resistance of samples with hybrid coating by 7 times comparing the Mg alloy without a coating. These properties make the hybrid Mg-ZK coating an attractive modification for bone implants.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"36 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-level biomimetic LDH coatings with super hydrophobicity, corrosion resistance, anti-icing and anti-fouling properties on magnesium alloy","authors":"Lin Dai, Hongzhi Cui, Xiaohua Chen, Ruiqi Xu, Yuhao Zhang, Leigang Li","doi":"10.1016/j.jma.2025.04.012","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.012","url":null,"abstract":"In this study, femtosecond pulsed laser processing was applied to the magnesium alloy, followed by in situ growth of Mg-Al layered double hydroxides (LDHs), and finally modification with low surface energy materials to prepare a biomimetic of centipede-like superhydrophobic composite coating. The resulting biomimetic coating features a dual-scale structure, comprising a micron-scale laser-etched array and nano-scale LDH sheets, which together create a complex hierarchical architecture. The multistage bionic superhydrophobic coating exhibits exceptional corrosion resistance, with a reduction in corrosion current density by approximately five orders of magnitude compared to the bare magnesium alloy substrate. This remarkable corrosion resistance is attributed to the synergistic effects of the superhydrophobicity with a contact angle (CA) of 154.60°, the densification of the surface LDH nanosheets, and the NO₃^- exchange capacity. Additionally, compared to untreated AZ91D alloy, the biomimetic coating prolongs ice formation time by 250% at -40 °C and withstands multiple cycles of sandpaper abrasion and repeated tape peeling tests. Furthermore, it demonstrates excellent self-cleaning and anti-fouling properties, as confirmed by dye immersion and dust contamination tests. The construction of the multi-level bionic structured coating not only holds significant practical potential for metal protection but also provides valuable insights into the application of formed LDH materials in functional bionic coating engineering.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"96 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of a large dominant pore and its location on ductility of thin-walled high-pressure die-cast magnesium","authors":"Kyoo Sil Choi, Xin Sun, Mei Li","doi":"10.1016/j.jma.2025.04.008","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.008","url":null,"abstract":"High-pressure die-cast (HPDC) magnesium (Mg) and aluminum alloys enable vehicle lightweighting while reducing manufacturing costs by simplifying part assembly. The increasing use of super-large castings in electric vehicles enhances structural reliability and cost efficiency. However, HPDC Mg alloys face challenges related to casting defects such as porosity, cold shuts, and oxides. These defects influence tensile strength and ductility, depending on their location and size. This study employs finite element (FE) modeling to investigate how a dominant large pore, its position, and the sample size affect the ductility of thin-walled HPDC Mg. Motivated by the ductility variations reported in literature and the experimental findings on AM60 castings, synthetic microstructure-based models are used to assess the effects of different pore sizes and locations. The results indicate the presence of three different regions based on the large pore size and model size: 1) a region dominated by the effects of the large pore, 2) a plateau region dominated by pore interactions, and 3) a transient region between these two effects. A threshold distance from the sample edge (<span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">d</mi><mo is=\"true\">≈</mo><mn is=\"true\">0.9</mn><msqrt is=\"true\"><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">D</mi><mo is=\"true\">·</mo><mi mathvariant=\"normal\" is=\"true\">L</mi></mrow></msqrt></mrow></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.779ex\" role=\"img\" style=\"vertical-align: -0.466ex;\" viewbox=\"0 -995.6 6116.5 1196.3\" width=\"14.206ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\"><use xlink:href=\"#MJMAIN-64\"></use></g><g is=\"true\" transform=\"translate(834,0)\"><use xlink:href=\"#MJMAIN-2248\"></use></g><g is=\"true\" transform=\"translate(1890,0)\"><use xlink:href=\"#MJMAIN-30\"></use><use x=\"500\" xlink:href=\"#MJMAIN-2E\" y=\"0\"></use><use x=\"779\" xlink:href=\"#MJMAIN-39\" y=\"0\"></use></g><g is=\"true\" transform=\"translate(3170,0)\"><use x=\"0\" xlink:href=\"#MJMAIN-221A\" y=\"64\"></use><rect height=\"60\" stroke=\"none\" width=\"2112\" x=\"833\" y=\"805\"></rect><g transform=\"translate(833,0)\"><g is=\"true\"><g is=\"true\"><use xlink:href=\"#MJMAIN-44\"></use></g><g is=\"true\" transform=\"translate(986,0)\"><use xlink:href=\"#MJMAIN-22C5\"></use></g><g is=\"true\" transform=\"translate(1487,0)\"><use xlink:href=\"#MJMAIN-4C\"></use></g></g></g></g></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">d</mi><mo is=\"true\">≈</mo><m","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"114 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143945741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of double-extrusion following by stepwise-hot-rolling on microstructures and mechanical properties of Mg-Gd-Y-Zn-Zr alloy","authors":"Jinjun Wang, Muhammad Abubaker Khan, Shang Dai, Yun Feng, Han Wang, Mohamed A. Afifi, Jingyuan Li","doi":"10.1016/j.jma.2025.03.007","DOIUrl":"https://doi.org/10.1016/j.jma.2025.03.007","url":null,"abstract":"Mg alloys with a combination of high strength and excellent ductility are increasingly required for structural applications. This study investigates the influence of advanced processing techniques on the mechanical properties and microstructural evolution of Mg-Gd-Y-Zn-Zr alloys. Utilizing a combination of double extrusion and stepwise hot rolling followed by aging treatments, significant enhancements in the mechanical performance of these alloys are demonstrated. The processing techniques applied lead to notable refinement in grain-size and modifications in the microstructure, including the transformation of LPSO phases from 18R to 24R and the dispersion of β phase particles. These microstructural transformations contribute to a substantial increase in yield-strength, ultimate-tensile-strength, and ductility. Furthermore, findings reveal that these improvements are also supported by alterations in material texture, which influence dislocation dynamics as indicated by changes in Kernel Average Misorientation (KAM) values. The combined effect of grain boundary (GB) strengthening, phase distribution, and texture modification elucidates the observed mechanical enhancements. This research provides valuable insights into the design and optimization of Mg-Gd-Y-Zn-Zr alloys for critical applications in aerospace and automotive industries where high strength and ductility are paramount.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"26 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uncovering the impact of Gd content on the microstructure and mechanical properties of wire-arc directed energy deposited Mg-Gd-Y-Zr alloys","authors":"Xinzhi Li, Jiarong Guo, Mugong Zhang, Li Guan, Haonan Wu, Jian Zhou, Xuewei Fang, Liang Gui, Ke Huang","doi":"10.1016/j.jma.2025.04.019","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.019","url":null,"abstract":"The preparation of large-sized magnesium rare-earth (Mg-RE) alloy parts using wire-arc directed energy deposition (WA-DED) has clear advantages such as high-efficiency and cost-effective. The impact of Gd content, which is one of the most important RE elements, on the microstructure evolution and mechanical response of the as-deposited and heat-treated Mg-Gd-Y-Zr alloys, deserves to be thoroughly unveiled. Herein, multi-scale microstructure characterization and mechanical evaluation of Mg-<em>x</em>Gd-2Y-0.5Zr (wt%, <em>x</em> = 4, 7, and 10) alloys were carried out. Specifically, the increased Gd content facilitates the grain refinement, micro-segregation, and precipitation during the deposition process. As a result, the strength of the as-deposited samples with increased Gd content was improved through refined grain and dispersion strengthening of nano-β\", but the ductility was severely deteriorated due to the premature failure caused by excessive β-Mg₂₄(Gd, Y)₅ eutectic phases. Besides, the increased Gd content successfully restrains grain coarsening through higher content of eutectic phase and larger RE-rich region during solution treatment. Following peak-aging treatment, while the increased Gd content does not affect the precipitation types, the content of nano-β' was remarkably enhanced, which leads to excellent strength. Ultimately, a superior yield strength of 239 MPa, an ultra-high ultimate tensile strength of 371 MPa and an elongation of 4 % are achieved in the solution plus aging-treated Mg-10Gd-2Y-0.5Zr alloy. This study thus provides guidelines on the composition modification and post-treatment of WA-DED Mg-Gd-Y-Zr alloys suitable for engineering applications.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"91 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling the Mg2+/Li+ dual-ion co-intercalation mechanism in 3D MXene heterojunctions for enhanced Mg/Li hybrid ion battery performance","authors":"Fanfan Liu, Xiaomeng Fan, Xinyue Gao, Jinjin Ban, Guoqin Cao, Shilin Zhang, Junhua Hu","doi":"10.1016/j.jma.2025.04.011","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.011","url":null,"abstract":"Rechargeable Mg/Li hybrid ion batteries with Mg²⁺/Li⁺ double-salt electrolytes and safe Mg anodes are a viable option for large-scale energy storage. Nevertheless, achieving the desired reasonable electrochemical performance remains a great challenge due to the capacity limitations of conventional Li-intercalation cathodes. To mitigate this limitation, the 3D oxygenated MXene Ti₃C₂@CoS₂/FeS₂ (denoted as o-Ti₃C₂@CoS₂, o-Ti₃C₂@FeS₂) with both dual-storage mechanism and multidimensional structure to achieve the desirable storage capacity is engineered. Benefiting from the formation of special structure and interfacial chemical bonds Ti–O–Co/Ti–O–Fe, as well as the electronegative o-Ti₃C₂ weaken the Co–S/Fe–S bonds, the o-Ti₃C₂@CoS₂ cathode exhibits superior capacity up to 425 mAh <em>g</em>⁻¹ at 100 mA <em>g</em>⁻¹ and overwhelming advantageous ultra-long life over 2,400 cycles at 500 mA <em>g</em>⁻¹. Simultaneously, the o-Ti₃C₂@FeS₂ also displays a high-rate capability, outstanding cycling stability, and fast diffusion kinetics. Furthermore, the conversion reaction of Mg²⁺/Li⁺ co-intercalation and the charge storage mechanism during cycling are thoroughly clarified by systematic ex-situ characterizations and theoretical computations. This study reveals the influence of MXene electrode structure on the importance of electrochemical performance and provides guidance for the future design of high-performance MXene materials for energy storage applications.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"11 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Additive manufacturing high-strength and ultra-high-rare-earth magnesium alloys: Excellent long-time aging hardening and strengthening behavior","authors":"Zhe Xu, Zhuo Li, Chunjie Shen, Dongdong Zheng, Yuxuan Tu","doi":"10.1016/j.jma.2025.04.007","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.007","url":null,"abstract":"Gadolinium (Gd) is one of the most effective strengthening elements for magnesium alloys. The development of commercially available Mg-Gd alloys with high Gd content and the optimization of their preparation processes have been a major focus in magnesium alloy research. In this study, a Mg-23Gd-2Zn-0.4Zr alloy with ultra-high Gd content is designed, and high-quality fabrication is achieved using laser-directed energy deposition (LDED) technology. Through heat treatment and microstructure control, a balance between tensile strength (425 MPa) and elongation (3.4 %) is achieved. The ultra-high strength of the LDED-T6 VZ232K alloy is primarily attributed to precipitation strengthening caused by the ultra-high density (2.4 × 10⁴ µm^-2) of β′ phase. The high ductility is mainly due to the modification of the fracture mode, facilitated by the introduction of a substantial number of stacking fault structures during solution heat treatment. The extended hardness plateau (exceeding 138 Hv) and high yield strength (exceeding 300 MPa) are associated with the three-directional cross-interlocked structure of the β′ phase in the over-aged state at 220 °C and 250 °C. The analysis of the LDED-VZ232K alloy indicates that reduced heat input during the additive manufacturing (AM) process is critical for the defect-free fabrication of alloys with ultra-high Gd content.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"25 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of damage evolution in pure magnesium during surrogate high-energy electron irradiation for Brachytherapy seed application","authors":"Hucheng Yu, Sichen Dong, Qi Chen, Xiaoou Yi, Hui Liu, Hao Fang, Wentuo Han, Pingping Liu, Somei Ohnuki, Farong Wan","doi":"10.1016/j.jma.2025.04.010","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.010","url":null,"abstract":"Evaluation of damage evolution effects in biodegradable pure Mg was carried out, using transmission electron microscope as surrogate irradiation for high-energy radionuclide β decay in Brachytherapy. Time-dependent quantitative defect production, evolution dynamics, and evolution statistics were revealed &lt;em&gt;in-situ&lt;/em&gt; for two prism foils (&lt;strong&gt;&lt;em&gt;z&lt;/em&gt;&lt;/strong&gt; = [&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;1&lt;/mn&gt;&lt;mrow is=\"true\"&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;mo is=\"true\"&gt;&amp;#xAF;&lt;/mo&gt;&lt;/mover&gt;&lt;mn is=\"true\"&gt;10&lt;/mn&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 2072 947.9\" width=\"4.812ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-31\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(500,0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\" transform=\"translate(35,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-32\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(0,198)\"&gt;&lt;use x=\"-70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"&gt;&lt;/use&gt;&lt;use x=\"70\" xlink:href=\"#MJMAIN-AF\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(570,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-31\"&gt;&lt;/use&gt;&lt;use x=\"500\" xlink:href=\"#MJMAIN-30\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;span role=\"presentation\"&gt;&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;1&lt;/mn&gt;&lt;mrow is=\"true\"&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;mo is=\"true\"&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn is=\"true\"&gt;10&lt;/mn&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;1&lt;/mn&gt;&lt;mrow is=\"true\"&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mn is=\"true\"&gt;2&lt;/mn&gt;&lt;mo is=\"true\"&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;mn is=\"true\"&gt;10&lt;/mn&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;], [&lt;span&gt;&lt;span style=\"\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow is=\"true\"&gt;&lt;mn is=\"true\"&gt;10&lt;/mn&gt;&lt;mrow is=\"true\"&gt;&lt;mover accent=\"true\" is=\"true\"&gt;&lt;mn is=\"true\"&gt;1&lt;/mn&gt;&lt;mo is=\"true\"&gt;&amp;#xAF;&lt;/mo&gt;&lt;/mover&gt;&lt;mn is=\"true\"&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"&gt;&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"2.202ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -846.5 2072 947.9\" width=\"4.812ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMAIN-31\"&gt;&lt;/use&gt;&lt;use x=\"500\" xlink:href=\"#MJMAIN-30\" y=\"0\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g ","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure and mechanical properties of AZ91/TiP magnesium matrix composite ribbons fabricated by melt-spinning","authors":"Xiaodan Song, Tianguo Wang, XinTao Li, Zhenyang Liu, Xiaohui Zhang, Bo Feng, Huantao Chen, Kaihong Zheng, Fusheng Pan","doi":"10.1016/j.jma.2025.04.018","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.018","url":null,"abstract":"There are few studies on the preparation of magnesium matrix composites (MMCs) by rapid solidification. This study aims to add minor amounts of Ti particles to AZ91 alloy and prepare AZ91/Ti_P MMC ribbon by Melt-Spinning (MS). The effects of Ti particle content on the microstructure and mechanical properties of AZ91/Ti_P ribbon were studied by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD), transmission electron microscopy (TEM), three-dimensional profiling (3D-P) and calculation of supercooling rate. The results show that the grain refinement of AZ91 ribbon prepared by rapid solidification is very significant and the grain refinement is further improved with the increase of Ti particle content; at the same time, the growth of β-Mg₁₇Al₁₂ is inhibited, and the interface reaction between Ti and Mg leads to the formation of interfaces around Ti particles. These nano-scale Ti₃Al and Al₃Ti interface compounds uniformly wrap the Ti particles. It is believed that the addition of Ti particles not only helps to refine the surrounding grains, but also increases the dislocations in the MMC ribbon and forms a good interface, thereby improving the mechanical properties. Compared with AZ91 alloy ribbon, the yield strength and tensile strength of MMC material containing 5 wt.% Ti particles increased by 25.0 % and 22.7 % respectively. The elongation only decreased by 10.9 %. AZ91/5 wt.% Ti_P ribbon has a better balance between high strength and high elongation. The analysis shows that the strengthening effect of this mechanical property is mainly attributed to fine grain strengthening, dislocation strengthening and non-basal slip.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"39 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143926344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strength improvement achieved by microstructure regulation for wire-arc directed energy deposited Mg-Li alloy","authors":"Yueling Guo, Xinglong Di, Ruiwen Shao, Ming Fan, Xiaoxue Chang, Changmeng Liu, En-Hou Han","doi":"10.1016/j.jma.2025.04.016","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.016","url":null,"abstract":"Here we fabricate LA103Z Mg-Li alloy via wire-arc directed energy deposition (WA-DED), and subsequent aging treatment is employed to improve its mechanical property. Results show that a typical dual-phase microstructure is formed upon WA-DED, consisting of α-Mg, β-Li, AlLi and Li₂MgAl, with negligible porosity, and the core-shell Li₂MgAl/AlLi composite particles are also generated. After aging treatment, the microstructure is slightly coarsened, together with the precipitation of nano-sized D0₃−Mg₃Al particles, as well as the dissolution and the mergence of α-Mg phases. Negligible strength and ductility anisotropies are found for the as-deposited alloy. Significant strength increment is achieved via aging treatment, and the ultimate strength increases by ∼20% (∼34 MPa), reaching 200±1 MPa. Both as-deposited and aged alloys show acceptable uniform elongation, with a transgranular fracture mode. Precipitation strengthening enabled by nano-sized D0₃−Mg₃Al precipitates is primarily responsible for the strength increment mediated by aging treatment. Grain refinement strengthening and solid solution strengthening provide additional contributions to the improved strength. Our work thus offers an applicable additive manufacturing pathway for the efficient and safety-guaranteed fabrication of Mg-Li alloy components with decent mechanical property.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"10 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}