Journal of Magnesium and Alloys最新文献

{"title":"A new perspective on tensile yield plateau formation in extruded Mg-4.83Gd-2.36Nd-0.21Zr alloy","authors":"Chunhui Wang, Guangyu Yang, Zhiyong Kan, Wanqi Jie","doi":"10.1016/j.jma.2025.08.013","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.013","url":null,"abstract":"The occurrence of the tensile yield plateau in Mg alloys is relatively rare and its underlying reasons have been controversial. In this study, we systematically investigated the deformation mechanism of an extruded Mg-4.83Gd-2.36Nd-0.21Zr alloy, which exhibited an obvious tensile yield plateau. Quasi-in-situ EBSD analysis revealed that basal slip was the predominant mechanism in the tensile yield stage, which was attributed to the weak rare earth texture that facilitated basal slip activation and the fine recrystallized grains that suppressed twinning. The yield drop resulted from the combined effects of the easy activation of basal slip and the dislocation pinning by solute atoms. Additionally, the random distribution of grain orientations, high grain boundary misorientation angles (GBMA), and small grain sizes hindered intergranular deformation transfer between neighboring grains. The weak deformation transfer contributed to the formation of yield point elongation. This work underscores the role of texture, grain orientations, and GBMA in determining the yield plateau, offering a new perspective on yield plateau formation in Mg alloys.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"59 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043241","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":"Biodegradable Mg-based medical devices: From passive support to active modulation","authors":"Lin Mao, Zhongxin Hu, Chengli Song","doi":"10.1016/j.jma.2025.08.012","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.012","url":null,"abstract":"Biodegradable magnesium (Mg)-based medical devices have revolutionized medical implants by uniquely combining biocompatibility and mechanical strength. Fully degradable Mg-based implants have been developed to provide temporary structural support and serve as a dynamic scaffold for tissue repair and restructuring. Additionally, Mg-based devices can respond to physiological signals, and their integration with electrical currents or pulses has been explored to enhance tissue healing and functional recovery. This review provides a comprehensive overview of the development and application of Mg-based medical devices, highlighting their evolution from traditional orthopedic, vascular, and dental uses to advanced systems that actively modulate physiological processes—a shift from passive support to active modulation. The application range of Mg-based devices has expanded from early vascular sutures, bone screws, and stents to multiple clinical fields including porous bone repair scaffolds, anastomotic staples, bioactive devices, and electro-active systems. Bioactive Mg devices demonstrate therapeutic properties including antibacterial, anti-inflammatory, anti-tumor, and osteogenic functions through their degradation products, while electro-active devices utilize the electrical properties of Mg for sensing, monitoring, and therapeutic stimulation. Finally, this review highlights current challenges, including maintaining mechanical support performance, optimizing control of biochemical reactions, and balancing electro-regulatory functions, and identifies future research directions aimed at enhancing the clinical application of biodegradable Mg-based implants, thereby contributing to the significant advancement in the biomedical field.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"9 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145017580","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 review of corrosion and environmentally assisted cracking of Mg-Li alloys","authors":"Yinmin Du, Shidong Wang, Yixin Zhang, Chuanqiang Li, Shuo Wang, Xiaopeng Lu, Daokui Xu, Hongzhi Cui, Bolv Xiao, Zongyi Ma","doi":"10.1016/j.jma.2025.07.023","DOIUrl":"https://doi.org/10.1016/j.jma.2025.07.023","url":null,"abstract":"Mg-Li alloys hold significant potential for applications in aerospace, automotive manufacturing, military weaponry, and biomedical implants, due to their excellent recyclability, high specific strength, biocompatibility, and superior electromagnetic shielding properties. However, their poor corrosion resistance and high susceptibility to environmentally assisted cracking (EAC) significantly limit broader application. In recent years, growing attention has been directed toward understanding the corrosion and EAC behavior of Mg-Li alloys, as localized corrosion areas and hydrogen generated during the corrosion process can serve as crack initiation points and promote crack propagation. A comprehensive understanding of these mechanisms is essential for enhancing the reliability and performance of Mg-Li alloys in practical environments. This paper presents a detailed review of corrosion and EAC in Mg-Li alloys, focusing on corrosion behavior, crack initiation and propagation mechanisms, and the key factors influencing these processes. It summarizes recent advances in alloying, heat treatment, mechanical processing, microstructural control, environmental influences, mechanical loading, and surface treatments. In addition, the paper explores future research directions, highlights emerging trends, and proposes strategies to improve the durability and service performance of Mg-Li alloys.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"34 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144995455","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":"Ductility enhancement mechanism of laser welded magnesium alloy joints via synergistic effect of Gd powder addition and oscillating laser","authors":"Chuang Cai, Yong He, Enhua Wang, Zejun Xian, Hui Chen","doi":"10.1016/j.jma.2025.08.010","DOIUrl":"https://doi.org/10.1016/j.jma.2025.08.010","url":null,"abstract":"Mechanical property of welded joint is an essential and critical factor for the widely application of magnesium alloy in component manufacturing. In this study, the synergistic effects of oscillating laser and Gd powder addition on ductility of laser-MIG hybrid welded magnesium alloy joints were investigated. Furthermore, the ductility enhancement mechanism was elucidated based on grain refinement and crack propagation behavior. The joint elongation was increased by 145.3 % while compared with that of non-oscillating laser welding. The stirring effect of oscillating laser and aggregation of high-melting-point precipitated phases (Mg, Al)₂Gd resulted in the grain refinement. The plastic anisotropy of the weld was reduced due to the randomized grain orientation, which was induced by the homogenic weld microstructure. Consequently, the activation of 〈<em>c</em> + <em>a</em>〉 dislocation slip was enhanced, which was the key factor for plasticity improvement. During the crack propagation process, the grain orientation was rotated by twins and the geometric compatibility of adjacent grains was improved. Consequently, the crack propagation along the grain boundary was hindered efficiently. The findings of this study contribute to the advancement of oscillating laser with power feeding welding technology and provide a valuable reference for enhancing ductility of magnesium alloy welded joints.","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"58 30 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144987572","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":"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}