Journal of Magnesium and Alloys最新文献

{"title":"Unusual texture evolution in extruded AZ31 Mg alloy plates with bimodal grain structures","authors":"Z.L. Wu, T. Nakata, E.Y. Guo, C. Xu, H.C. Pan, X.J. Wang, H.L. Shi, X.J. Li, S. Kamado, L. Geng","doi":"10.1016/j.jma.2025.08.004","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.004","url":null,"abstract":"AZ31 Mg alloy plates with bimodal grain structures were fabricated via conventional extrusion under varying temperatures and speeds to investigate the mechanisms governing dynamic recrystallization (DRX) and texture evolution. Although all samples exhibited similar DRXed grain sizes (5.0–6.5 µm) and fractions (76 %–80 %), they developed distinct c-axis orientations and mechanical properties. The P1 sample (350 °C, 0.1 mm/min) exhibited the lowest yield strength (∼192 MPa) but the highest elongation (∼18.2 %), whereas the P3 sample (400 °C, 0.6 mm/min) showed the highest yield strength (∼241 MPa) and the lowest elongation (∼14.2 %). The P2 sample (400 °C, 0.1 mm/min) demonstrated intermediate behavior (∼226 MPa, ∼17.7 %). These variations were primarily attributed to differences in c-axis orientations, particularly their alignment with respect to the normal direction (ND) and their slight deviation from the extrusion direction (ED). Microstructural analysis revealed that distinct DRX mechanisms were activated under different extrusion conditions. P1 predominantly exhibited twinning-induced dynamic recrystallization (TDRX) and continuous dynamic recrystallization (CDRX), whereas P3 primarily showed CDRX and discontinuous dynamic recrystallization (DDRX). These DRX mechanisms, in combination with the activated slip systems governed by the evolving local stress state, collectively contributed to orientation rotation and texture development. During the early stage of extrusion, tensile strain along the ED promoted basal &lt;<em>a</em>&gt; slip, rotating the c-axes toward the ND. As deformation progressed, compressive strain along the ND became dominant. In P1, basal &lt;<em>a</em>&gt; slip remained active, aligning the c-axes along the ND and forming a smaller angle with the ED. In contrast, P3 exhibited predominant pyramidal &lt;<em>c</em> + <em>a</em>&gt; slip, resulting in a pronounced deviation of the c-axes from the ND and a slightly larger angle relative to the ED. The P2 sample exhibited a transitional texture state between those of P1 and P3.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"33 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144987593","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":"Manipulation of electrochemically (In)active elements in Na3VMg0.5Ti0.5(PO4)3 and Na3.5V0.5MgTi0.5(PO4)3: Enhancing the longevity of NASICON-type cathodes for sodium-ion batteries","authors":"Vaiyapuri Soundharrajan, JunJi Piao, Subramanian Nithiananth, Vitalii Ri, Jung Ho Kim, Chunjoong Kim, Jaekook Kim","doi":"10.1016/j.jma.2025.07.021","DOIUrl":"https://doi.org/10.1016/j.jma.2025.07.021","url":null,"abstract":"The sodium superionic conductor (NASICON)-type cathode, Na₃V₂(PO₄)₃ (NVP), is considered as a promising cathode material for sodium-ion batteries (SIBs), which offers stable sodium storage capability. However, hazardous and expensive vanadium (V) has limited its practical application. To reduce the V dependency in NASICON-type cathodes, two new NASICON-structured materials, Na₃VMg_0.5Ti_0.5(PO₄)₃ (N_3.0VMTP/C) and Na_3.5V_0.5MgTi_0.5(PO₄)₃ (N_3.5VMTP/C), were designed for cost-effectiveness as well as improvement of battery performance. N_3.0VMTP/C and N_3.5VMTP/C provided a sodium storage capacity of 155.84 mAh <em>g</em>⁻¹ and 105 mAh <em>g</em>⁻¹ at 12 mA <em>g</em>⁻¹ with 88 % and 84 % capacity retention after 500 cycles at 150 mA <em>g</em>⁻¹, respectively. <em>In-situ</em> XRD analysis revealed that both cathodes undergo a progressive solid solution reaction in the lower voltage region and two-phase reaction at higher voltages during (de)sodiation, with only minor difference in the degree of lattice displacement, confirming their high potential for the SIBs with sustainable and cheaper Mg for grid-scale utilization.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"23 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144928094","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":"Control mechanism of Ni-foil on the interfacial structure and properties of the magnesium alumina laminated composite plate","authors":"Xianquan Jiang, Na yang, Jiangyang Yu, Ruihao Zhang, Kaihong Zheng, Jing Li, Bo Feng, Xiaowei Feng, Fusheng Pan","doi":"10.1016/j.jma.2025.06.025","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.025","url":null,"abstract":"The paper study the interfacial mechanical properties and structural evolution mechanisms in 6061/AZ31B/6061 composite plates with and without Ni foil interlayers. For Ni-free interfaces, a continuous diffusion layer (3.5–4.0 µm) forms, dominated by brittle columnar Al₁₂Mg₁₇ intermetallic compounds (IMCs, 0.27–0.35 µm thick), which act as preferential crack initiation sites. In contrast, Ni foil implantation induces interfacial restructuring during hot rolling: Constrained deformation fragments the Ni foil into grid-like segments with \"olive\"-shaped cross-sections, embedded into Mg/Al matrices. These fragments (56% areal coverage) coexist with dispersed multiphase IMCs (Mg₂Ni, Al₃Ni, Mg₃AlNi, Al₁₂Mg₁₇; 10–20 nm grains) at fragment edges, forming a hybrid interface of \"willow-leaf\" Al₁₂Mg₁₇ islands and nanoscale Mg₂Ni/Al₃Ni layers (15–25 nm). Hall-Petch analysis reveals the multiphase IMC interface exhibits 3.6 × higher \"kd⁻¹/²\" strengthening contribution than single-phase Al₁₂Mg₁₇ systems, attributed to grain refinement (20 nm vs. 260 nm average grain size). Synergistic effects of mechanical interlocking, adhesion hierarchy (Ni-Al &gt; Ni-Mg &gt;Al-Mg), and nanoscale reinforcement collectively enhance peel strength by 78% without compromising bulk tensile properties.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"30 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931218","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":"Efficient and smart hybrid coatings for active corrosion protection of magnesium alloys","authors":"A.S. Gnedenkov, S.L. Sinebryukhov, V.S. Marchenko, A.D. Nomerovskii, A.Yu. Ustinov, A. Fattah-alhosseini, S.V. Gnedenkov","doi":"10.1016/j.jma.2025.07.017","DOIUrl":"https://doi.org/10.1016/j.jma.2025.07.017","url":null,"abstract":"This article discusses potential solutions to overcome current limitations for clinical implementation of Mg implants by forming the biocompatible hybrid PEO-based inhibitor- and polymer-containing coatings for a controlled corrosion degradation of the bioresorbable material. Multifunctional hybrid coatings were obtained on MA8 magnesium alloy. The porous ceramic-like coating synthesized by plasma electrolytic oxidation served as a base for further modification with bioresorbable polymer (polycaprolactone, PCL) contained halloysite nanotubes (HNTs) with corrosion inhibitor (benzotriazole, BTA). The method for HNT impregnating with BTA and introducing them into the matrix of PCL was proposed. The chemical composition of the protective layers was studied using SEM-EDX, XRD, XPS, and Raman microspectroscopy. Anticorrosion protection level of the coated specimens was determined by means of electrochemical techniques, weight loss, and hydrogen evolution tests. The samples with hybrid layers showed the best corrosion protection during 23 h exposure to Hanks’ Balanced Salt Solution (<em>|Z|_f</em> <em>₌</em> _0.1 _Hz = 1.02 MΩ·cm², <em>I_C</em> = 11 nA·cm^–2, <em>R_p</em> = 2.4 MΩ·cm²) and the lowest degradation rate (0.021 mm/year) after 7 day of exposure to HBSS among all the tested samples. The electrochemical activity on microscale of samples with the studied coatings was estimated by localized electrochemical techniques. The degradation mechanism of specimens with hybrid layers was proposed. The prospects of hybrid layer application in regulating the resorption process of Mg alloys were shown.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"8 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144928543","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-containing composite hydrogel scaffolds with immunomodulatory and osteogenic dual effects enhance bone defect repair via CD4+ T cells modulation","authors":"Shubo Liu, Qinghua Chen, Yaowen Xu, Haidong Yu, Jue Cao, Zichu Ding, Weixin Zheng, Keyu Chen, Yuexin Zhao, Yan Shi, Shaoxiong Min, Ben Wang, Jie Shen, Bin Chen","doi":"10.1016/j.jma.2025.07.020","DOIUrl":"https://doi.org/10.1016/j.jma.2025.07.020","url":null,"abstract":"The clinical challenges of bone defect repair have driven the exploration of novel biomaterials with immunomodulatory and osteogenic functionalities. While previous studies predominantly focused on macrophages in the osteoimmune microenvironment, the regulatory mechanisms of T cells, particularly \"conductor\" CD4⁺ T cells, remain poorly understood. This study investigated the effects of magnesium ions (Mg²⁺) on CD4⁺ T cell polarization and their mediated bone regeneration using Mg²⁺-functionalized composite materials. Results demonstrated that suitable Mg²⁺ concentration range significantly enhanced CD4⁺ T cell activation and proliferation, promoting polarization toward Th1 and Treg subtypes, thereby establishing a pro-inflammatory and anti-inflammatory synergistic immune microenvironment. Conditioned medium experiments further confirmed that cytokines secreted from CD4⁺ T cells synergized with Mg²⁺ to augment alkaline phosphatase activity and calcium deposition in bone marrow mesenchymal stem cells (MSCs), while mitigating the inhibitory effects of high Mg²⁺ concentrations on osteogenesis. Then, nano-magnesium oxide-doped polycaprolactone scaffolds (Mg-PCL) and T cell activator-crosslinked magnesium-alginate hydrogels (T-Mg-Gel) were engineered to control the release of Mg²⁺. <em>In vivo</em> evaluations revealed that 1%Mg-PCL scaffolds facilitated membranous ossification in cranial defects via sustained Mg²⁺ release, whereas T-Mg-Gel accelerated bone regeneration by suppressing early-stage inflammation and promoting long-term Treg cell regulation. This study revealed the pivotal role of CD4⁺ T cells in osteoimmunology and provides a novel strategy for designing intelligent bone repair materials with dual immunomodulatory and osteogenic capabilities.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"22 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144919288","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":"High voltage cathode materials for rechargeable magnesium batteries: Structural aspects and electrochemical perspectives","authors":"Dedy Setiawan, Jiwon Hwang, Munseok S. Chae, Seung-Tae Hong","doi":"10.1016/j.jma.2025.07.018","DOIUrl":"https://doi.org/10.1016/j.jma.2025.07.018","url":null,"abstract":"Rechargeable magnesium batteries (RMBs) are a cutting-edge energy storage solution, with several advantages over the state-of-art lithium-ion batteries (LIBs). The use of magnesium (Mg) metal as an anode material provides a much higher gravimetric capacity compared to graphite, which is currently used as the anode material in LIBs. Despite the significant advances in electrolyte, the development of cathode material is limited to materials that operate at low average discharge voltage (&lt;1.0 V vs. Mg/Mg²⁺), and developing high voltage cathodes remains challenging. Only a few materials have been shown to intercalate Mg²⁺ ions reversibly at high voltage. This review focuses on the structural aspects of cathode material that can operate at high voltage, including the Mg²⁺ intercalation mechanism in relation to its electrochemical properties. The materials are categorized into transition metal oxides and polyanions and subcategorized by the intrinsic Mg²⁺ diffusion path. This review also provides insights into the future development of each material, aiming to stimulate and guide researchers working in this field towards further advancements in high voltage cathodes.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"70 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144915502","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":"Unveiling the mechanism of ultrasonic vibration on suppression of intermetallic compound growth in Al/Mg dissimilar friction stir welding","authors":"Lei Shi, Jie Liu, Chuansong Wu, Faliang He, Guoxin Dai, Ashish Kumar","doi":"10.1016/j.jma.2025.07.022","DOIUrl":"https://doi.org/10.1016/j.jma.2025.07.022","url":null,"abstract":"The formation of hard and brittle intermetallic compounds (IMCs) is a critical challenge in the friction stir welding (FSW) of Al/Mg dissimilar alloys, severely deteriorating joint integrity and mechanical performance. Although novel ultrasonic vibration-enhanced friction stir welding (UVeFSW) has been shown to reduce IMCs thickness, the underlying suppression mechanism remains unrevealed. In this study, the role of ultrasonic vibration (UV) in mitigating IMCs formation during the FSW of Al/Mg dissimilar alloy was systematically studied using both experimental and numerical methods. TEM was employed to characterize the IMC layer thickness and grain morphology at the Al/Mg interface within the weld nugget zone. In-situ temperature measurements revealed negligible differences in average welding temperatures between conventional FSW and UVeFSW, with both remaining well below the eutectic temperature. This confirms that IMC formation primarily proceeds through solid-state atomic diffusion. EBSD, micro-XRD, and TEM analyzes consistently showed that UV significantly reduces GND density and overall dislocation content in the interfacial region. It was found that UV suppresses short-circuit diffusion by decreasing dislocation density at the bonding interface, thereby lowering the Al/Mg atomic diffusion rate and effectively reducing the overall IMCs thickness. These findings offering a transformative approach to enhancing the interfacial integrity and mechanical performance of Al/Mg dissimilar welded joints.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"9 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910752","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":"Analytical equations for thermal and electrical conductivity prediction in as-cast magnesium alloys: A symbolic regression approach","authors":"Junwei Chen, Jun Luan, Shuai Jiang, Zhigang Yu, Yunying Fan, Kuochih Chou","doi":"10.1016/j.jma.2025.08.005","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.005","url":null,"abstract":"The thermal and electrical conductivities of magnesium alloys are highly sensitive to composition and microstructure, with thermal conductivity varying by up to 20-fold across different as-cast alloy systems, making rapid and accurate prediction crucial for high-throughput screening and development of high-performance alloys. This study introduces a physics-informed symbolic regression approach that addresses the limitations of traditional methods, including the high computational cost of first-principles calculations and the poor interpretability of machine learning models. Comprehensive datasets comprising 1512 data points from 60 literature sources were analyzed, including thermal conductivity measurements from 52 alloy systems and electrical conductivity measurements from 36 systems. The derived symbolic regression model achieved Mean Absolute Percentage Errors (MAPEs) of 11.2 % and 11.4 % for thermal conductivity in low and high-component systems, respectively. When integrated with the Smith-Palmer equation, electrical conductivity predictions reached MAPEs of 15.6 % and 16.4 %. Independent validation on an entirely separate dataset of 554 data points from 53 additional literature sources, including 37 previously unseen alloy systems, confirmed model generalizability with MAPEs of 10.7 %−15.2 %. Shapley Additive Explanations (SHAP) analysis was employed to evaluate the relative importance of different features affecting conductivity, while equation decomposition quantified the contribution of individual functional terms. This methodology bridges data-driven prediction with mechanistic understanding, establishing a foundation for knowledge-based design of magnesium alloys with tailored transport properties.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"23 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144910748","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 and age-strengthening mechanism of Mg-Gd-Y-Zr alloy fabricated by additive friction stir deposition","authors":"Jinglin Liu, Zeyu Zhang, Xiuwen Sun, Qi Wen, Sihao Chen, Youlong Shi, Zhanwen Feng, Long Wan","doi":"10.1016/j.jma.2025.06.030","DOIUrl":"https://doi.org/10.1016/j.jma.2025.06.030","url":null,"abstract":"Solid-state deposition additive manufacturing technology demonstrates significant advantages in fabricating high-strength rare-earth magnesium (Mg-Re) alloy components, including low forming temperature, high densification, uniform composition, and high efficiency. Here, a high-strength single-pass multilayer Mg-8Gd-3Y-0.5Zr alloy component was fabricated by the additive friction stir deposition (AFSD) method with an average layer thickness of 4 mm. The results indicate that the microstructures of the top, middle, and bottom regions of the AFSD component were equiaxed grain, with an average grain size of approximately 7.42 ± 0.58 µm. The interface region underwent two stages of plastic deformation under the separate effects of the shoulder and the feedstock, finer equiaxed grains were formed, with an average grain size of about 2.79 ± 0.14 µm. After artificial aging at 225 °C for 20 h, a large number of nano-β′ precipitates are uniformly distributed within the material. The ultimate tensile strength reached 355.52 ± 3.21 MPa in the building direction and 433.91 ± 2.31 MPa in the longitudinal direction, there is an increasing of 49.0 % and 45.9 % compared to the AFSD samples. No grain growth was observed in the interlayer and the interface after aging treatment. The finely dispersed nano-β' precipitates produced by artificial aging treatment are the key factor to improve the tensile strength of the deposited layer. The primary strengthening mechanisms were identified as precipitation strengthening and grain refinement, contributing 54.8 % and 26.7 % to the overall strengthening effect, respectively. These findings suggest that AFSD offers a novel and efficient solution for the fabrication of large-scale Mg-Re alloy components.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"16 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899388","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":"Interface nanocrystalline reinforcement mechanism of particle interlayer in pulsed current assisted rolling Mg/Al laminate","authors":"Peng Li, Xiaobao Ma, Yongheng Peng, Zhongkai Ren, Peng Chen, Tao Wang","doi":"10.1016/j.jma.2025.08.003","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.003","url":null,"abstract":"Interface transition zone and the interface influence zone are critical factors in determining the interfacial bonding strength and ductility of heterogeneous metallic laminates. In this study, an innovative process—“cold spraying + pulsed current rolling”—is proposed for fabricating Mg/Al laminates, significantly enhancing both interface strength and ductility. Notably, the average interface shear strength achieved is three times that of conventional hot rolling, reaching 70.7 MPa, while the interface shear strain increases from 3.4 % to 28 %. The high-velocity impact of cold-sprayed aluminum particles on Mg and Al substrates forms a three-dimensional interface, effectively expanding the interfacial bonding area and refining the interfacial microstructure. The fine-grained coating structure produced by cold spraying acts as a primer, facilitating the formation of a nanocrystalline interface during pulsed current assisted rolling. The interface comprises an ultrafine nanocrystalline Al coating with grain sizes around 30 nm and β-phase nanotwins approximately 300 nm in scale, significantly enhancing the interfacial bonding strength. Together with the Mg and Al substrates, the nanocrystalline transition layer forms a layered gradient transitional structure that evolves into a 50-µm-wide interface-affected zone during deformation. This unique feature promotes strain delocalization, effectively mitigates strain concentration at the interface, and improves its fracture toughness. Additionally, the nanocrystalline interface increases the grain boundary area, promoting atomic diffusion and strengthening metallurgical bonding both between the coating and the substrate and within the coating itself. The “cold spraying + pulsed current rolling” process offers a straightforward approach to fabricating laminated nanostructured transition layers, demonstrating great potential in the interfacial design of heterogeneous materials.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"28 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899390","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}