Journal of Magnesium and Alloys最新文献

{"title":"Effective catalytic effects of Mo2C MXene on the hydrogen storage in magnesium hydride","authors":"Xiaojiao Wang, Zhenluo Yuan, Yang Shi, Shangsheng Li, Guofa Mi, Qiuming Peng, Shumin Han, Yanping Fan, Baozhong Liu","doi":"10.1016/j.jma.2025.04.029","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.029","url":null,"abstract":"Magnesium hydride (MgH₂) has received widespread attention because of its high hydrogen capacity and low cost, but the sluggish kinetics limited its practical application. Herein, the two-dimensional Mo₂C MXene was constructed to motivate the efficient hydrogen storage in MgH₂ for the first time. After doping 10 wt% Mo₂C MXene, the starting dehydriding temperature was lowered to 225 °C, presenting a 117 °C reduction compared with that of as-received MgH₂. The 10 wt% Mo₂C-containing MgH₂ sample could rapidly release 6.7 wt% H₂ in 13 min at 300 °C, and the product after hydrogen release could absorb 6.0 wt% H₂ in 12 min at 200 °C, showing superior hydriding and dehydriding kinetics. Moreover, the activation energy (<em>E_a</em>) of MgH₂–10 wt% Mo₂C (107.58 ± 1.57 kJ/mol) was obviously lower than that of pure MgH₂ (130.45 ± 1.97 kJ/mol), and the reduced activation energy explained the reduced dehydrogenation temperature and enhanced kinetics. Microstructure characterization revealed that Mo-species (Mo⁰ and Mo²⁺) formed during ball milling served as active species accelerated the hydriding/dehydriding reactions, and the uniformly distributed active species and the interaction between Mo and O jointly promoted the hydrogen storage properties of MgH₂.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"91 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113351","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 novel flame retardant strategy for molten magnesium alloys: The effect of the new protective gas C3H2F6 on EV33 alloy","authors":"Longbiao Feng, Lunyong Zhang, Hongxian Shen, Chaojun Zhang, Zhi Song, Jiaming Cao, Fuyang Cao, Zhiliang Ning, Yongjiang Huang, Jianfei Sun","doi":"10.1016/j.jma.2025.04.021","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.021","url":null,"abstract":"Resolving the ignition issue of magnesium alloys is essential for broadening their application scope. This research investigates the EV33 magnesium alloy, delving into an innovative flame-retardant strategy, with a specific focus on the impact of the novel protective gas C₃H₂F₆ on the flame-retardant properties of the alloy. This paper unveils the morphological characteristics of the EV33 magnesium alloy surface in the absence of protective gas, while employing thermodynamic principles to establish the preferential reaction stages of the alloy, computing the residual stress of MgF₂, and assessing the flame-retardant and antioxidative properties of C₃H₂F₆. The study finds that under conditions without protective gas, the oxide film on the EV33 alloy surface is prone to cracking, which accelerates the ignition process of the alloy. Conversely, in an environment enriched with C₃H₂F₆, the formation of a dense oxide film on the alloy surface significantly enhances its thermal stability and flame-retardant properties. This mechanism encompasses the formation of a secondary oxide film, where C₃H₂F₆ accelerates the rapid development of this film, effectively repairing damage to the primary oxide film and inhibiting further diffusion of the oxidation reaction. Furthermore, this study elucidates the origin of oxide film rupture, showing that under conditions without protective gas, the precipitated phases and grain boundaries on the surface of the alloy induce the rupture of the oxide film, attributed to stress concentration phenomena occurring around the grain boundaries.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"135 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113724","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":"Wire-based friction stir additive manufacturing of AZ31B magnesium alloy: Precipitate behavior and mechanical properties","authors":"Xiuwen Sun, Yuming Xie, Xiangchen Meng, Zeyu Zhang, Huijia Tian, Wenjiang Dong, Jianing Dong, Xiaotian Ma, Naijie Wang, Yongxian Huang","doi":"10.1016/j.jma.2025.04.025","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.025","url":null,"abstract":"Simultaneous achievement of defect-free formation and high mechanical performance in additive manufactured Mg alloys remains challenging, bottlenecked by flammability, porosities, and oxidation risks within the melting-solidifying process. Here, wire-based friction stir additive manufacturing (W-FSAM), sparked by continuous wire feeding, severe plastic deformation transport, and solid-state deposition, was exploited to achieve sound Mg components. Greatly refined grains were obtained by severe plastic deformation, with an average grain size of 3.79 µm. Al₈Mn₅ precipitates underwent refinement and redistribution, while Mg₁₇Al₁₂ precipitates experienced solid solution and precipitation behaviors. Lattice mismatch was 4.92 % when Mg₁₇Al₁₂ precipitated on Al₈Mn₅. The strong flow-induced effect of the pin structure weakened the basal texture along the building direction, which was formed by the intense forging effect of W-FSAM tools. Alternating texture features coordinated the plastic deformation of slip and twinning, enabling superior ductility. Additionally, in-situ electron backscattered diffraction results revealed grain boundary sliding accommodated by grain rotation within the fine-grained structure. These unique microstructural features and precipitate behavior enhanced the overall mechanical properties, with an ultimate tensile strength of 257.3 ± 3.5 MPa and an elongation of 12.4 ± 0.3 % in building direction, and an ultimate tensile strength of 250.7 ± 2.0 MPa and an elongation of 12.2 ± 0.5 % in the traveling direction.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"1 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122432","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":"Abnormal grain growth mechanism and inhibiting strategy by a tailored two-step solution treatment of ZK60 Mg alloy","authors":"Guanghan Dang, Liang Chen, Jianwei Tang, Yuhui Zhao, Cunsheng Zhang, Xiangshan Kong","doi":"10.1016/j.jma.2025.04.024","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.024","url":null,"abstract":"Mg profiles extruded through porthole die inherently contain longitudinal welds, which can readily induce the abnormal grain growth (AGG) in solution treatment at elevated temperature. Here, a strategy of two-step (primary and secondary) solution is tailored to inhibit AGG. The results indicate that AGG during primary solution can only be suppressed when the temperature drops below 300 °C, while these samples experienced AGG during secondary solution. It is interesting that the width of abnormal grain after secondary solution significantly decreases from 1,473 to 71 µm with increasing the holding time of primary solution from 3 to 84 h. This inhibiting effect results in notable enhancements in mechanical properties, where the elongation, initial fracture points, and maximum bending force are improved by 88.58 %, 32.63 %, and 128.50 %, respectively. The dislocation density and types of the precipitated phases after primary solution are the main factors for inhibiting AGG. First, the dislocation density decreases with increasing the time of primary solution, reducing the stored energy in grain interior. Second, as the primary solution time is extended, MgZn₂ phases greatly become coarsening, accompanied by a transition in their relationship with α-Mg from coherent to semi-coherent. Moreover, the quantities of Mg₄Zn₇ (non-coherent with α-Mg) and Mg₂Zn₃ (semi-coherent with α-Mg) undergo a substantial increase, contributing to a high interfacial energy that effectively inhibits the grain boundary migration during secondary solution.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"127 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113675","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 evolution of laser directed energy deposition process prepared CNTs/WE43 composites during solution and aging treatment","authors":"","doi":"10.1016/j.jma.2025.04.015","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.015","url":null,"abstract":"Solution and aging treatment were conducted on the laser directed energy deposition (LDED)-prepared carbon nanotubes (CNTs)-reinforced WE43 (CNTs/WE43…","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"20 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122433","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":"Synergization of yield strength and ductility for a dilute Mg-Zn-Nd-Ca alloy through pinned twin boundary and Guinier–Preston zone","authors":"Xin Wan, Maolin Yin, Chao Zeng, Weilin Liu, Peng Peng, Linsong Zhang, Bi Jia, Jianyue Zhang, Qingshan Yang, Qingwei Dai","doi":"10.1016/j.jma.2025.04.027","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.027","url":null,"abstract":"Mg-Zn-RE alloys typically exhibit non-basal texture, weak dispersion hardening, and low yield strength. In this study, we designed a dilute quaternary Mg-0.6Zn-0.4Nd-0.2Ca (wt.%) alloy. Then, applied pre-strain and heat treatment to investigate the balance of yield strength and ductility via solute atom segregation at twin boundaries and nanophase modifications. The results indicated that Zn and Nd elements tend to co-segregate at the twin boundary, while Ca element segregates alone and presents a discontinuous distribution. Nanoscale precipitates of (Mg, Zn)₃Nd and Mg₂Ca with the size of 5∼20 nm underwent significant preferential precipitation at the twin boundary. Moreover, compared with Ca atoms, Zn atoms tend to combine with Nd atoms more preferentially towards the stacking faults, thereby forming a high-density monolayer Guinier-Preston (G.P.) zone. The segregation and precipitation of solute atoms at the twin boundary and the stacking faults increased the friction stress of twinning dislocations and lattice dislocations, thus improving the strength. Pinned twin boundaries facilitate the transition from basal 〈<em>a〉</em> slip to pyramidal 〈<em>c</em> + <em>a〉</em> slip due to the small geometrical compatibility factor (<em>m</em>′) value as well as the Schmid factor (SF) incompatibility. As a result, the pre-strained and heat-treated specimen's yield strength exhibits a 141 % increase relative to the initial state specimen, accompanied by a modest improvement in ductility. The mechanism of multi-element segregation and precipitation at twin boundaries, and G.P. zone formation was discussed in detail.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"63 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144104180","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":"Magnesium alloy implant GZ31K with enhanced corrosion resistance promotes fracture healing in vitro and in vivo systems","authors":"Yalikun Yusufu, Yunyang Zhang, Xinyun Liu, Jiahao Jiang, Zhiqiang Shao, Minghui Sun, Xiaobo Zhang, Qing Jiang","doi":"10.1016/j.jma.2025.03.027","DOIUrl":"https://doi.org/10.1016/j.jma.2025.03.027","url":null,"abstract":"Magnesium and its alloys have garnered significant attention as promising materials for bone tissue engineering, owing to their bone-like density and elastic modulus, favorable mechanical properties, biodegradability, biocompatibility, and diverse biological activities. However, rapid degradation, subcutaneous gas formation from H₂ release, and osteolysis caused by elevated Mg concentrations have limited its widespread clinical application. In this study, Mg-3.0Gd-1Zn-0.4Zr (GZ31K) alloy with desirable uniform degradation and stress corrosion resistance under extruded and drawn condition was used as internal fixation implants for fracture healing, while the commercially available WE43 alloy was used as control. Results revealed that GZ31K alloy exhibited refined grain structure, nanoscale distributed stacking faults and superior corrosion resistance compared to WE43 alloy. The corrosion rate of the extruded GZ31K and WE43 alloys are 0.25 mm/year and 0.35 mm/year, meeting the corrosion tolerance threshold for orthopedic implants (&lt;0.5 mm/year). <em>In vitro</em> study demonstrated that GZ31K alloy exhibited pronounced biocompatibilities and osteogenic bioactivities towards rat bone marrow mesenchymal stem cells (rBMSCs) compared with WE43 alloy, as evidenced by the enhanced ALP activity level, mineralized nodule formation and expression of osteogenic-related marker genes. <em>In vivo</em> results confirmed that GZ31K alloy retained its above 87.1% structural integrity for up to 8 weeks post-implantation and exhibited better corrosion resistance compared to the WE43 alloy (80.9%). Besides, the Sprague-Dawley rats administrated with GZ31K alloy exhibited greater bone volume, trabecular thickness, satisfactory load-bearing performance and surface degradation behavior at 8 weeks post-fracture healing compared to the Kirschner wire and the WE43 alloy. Taken together, these findings highlighted that GZ31K alloy with slower degradation rate, enhanced structural stability, exceptional biocompatibilities and osteogenic potential might provide sustained structural integrity and mechanical support throughout the fracture healing process, positioning it as a strong candidate for next-generation orthopedic implants.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"11 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144096933","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":"The recrystallization mechanism and its effects on texture in pre-twinned AZ31 magnesium alloy during medium-high temperature impact loading","authors":"Xiao Liu, Xiaofeng Zhang, Biwu Zhu, Chao Xie, Bibo Hu, Wenhui Liu, Luoxing Li, Congchang Xu, Pengcheng Guo","doi":"10.1016/j.jma.2025.04.023","DOIUrl":"https://doi.org/10.1016/j.jma.2025.04.023","url":null,"abstract":"Investigating effect of recrystallization mechanism on deformation mode and texture evolution is conducive to controlling deformation mechanism and texture in magnesium alloys under medium-high temperature impact loading. In the present study, a Johnson-Cook model incorporating twin strengthening was established to simulate macro-deformation, and a twinning induced recrystallization (TDRX) model and bulging recrystallization (GBBDRX) model are introduced into visco-plastic self consistant (VPSC) framework to quantitatively study the deformation mechanism of pre-twinned AZ31 magnesium alloy during medium-high temperature impact loading. Both TDRX and GBBDRX occur, with basal slip as the dominant slip system, followed by pyramidal 〈<em>c</em> + <em>a</em>〉 slip and prismatic slip. The dynamic recrystallization (DRX) significantly influences basal and pyramidal 〈<em>c</em> + <em>a</em>〉 slip systems, with minimal impact on secondary deformation mechanism. In addition, the recrystallization mechanism of grain boundary bowing increases the activity of basal slip and decreases the activity of pyramidal 〈<em>c</em> + <em>a</em>〉 slip. The nucleation and growth of recrystallized grains enhance basal slip activity and suppress pyramidal 〈<em>c</em> + <em>a</em>〉 slip, leading to the formation of a strong basal texture. As dynamic recrystallization progresses, a bimodal texture develops, characterized by a reduction in basal component pole density and a more pronounced basal slip.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087996","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":"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}