Journal of Materials Research and Technology-Jmr&t最新文献

{"title":"Unified constitutive modeling for hot tensile behavior of TC4 alloy with and without diffusion bonding joint","authors":"Zhongman Cai ,&nbsp;Yong Li ,&nbsp;Yanqiang Xu ,&nbsp;Jiarui Chen ,&nbsp;Xiaoxing Li ,&nbsp;Guanglu Ma ,&nbsp;Dongsheng Li","doi":"10.1016/j.jmrt.2025.01.014","DOIUrl":"10.1016/j.jmrt.2025.01.014","url":null,"abstract":"<div><div>The hot deformation and fracture behavior of TC4 with and without diffusion bonding (DB) are investigated in both experimental and numerical methods in this study. The hot tensile tests of TC4 specimens with and without DB have been carried out at a temperature of 750 °C and strain rate of 0.1–0.0001 s⁻¹, and the corresponding microstructure and fracture morphology under different deformation conditions have been analyzed by scanning electron microscope (SEM) and electron back scatter diffraction (EBSD). Straight grain boundaries, fine dynamic recrystallization (DRX) grains and weak joints formed by the DB process, which lead to lower stress and fracture strain than those of base metal (BM) specimens. Based on the experimental results, a new unified constitutive model considering the weld-dependent fracture coefficients and internal variables is developed, which can accurately predict the hot deformation and fracture behavior of TC4 with and without DB, describing the influence behavior of DB interface on hot deformation, as well as the evolutions of internal variables, including dislocation density, reserve fraction, DRX fraction and damage. The constitutive model has been further applied to the finite element method (FEM), and the prediction ability of the deformation behavior and the fracture of the model for hot deformation processes have been verified. It provides a theoretical basis for further accurate simulation of the hot forming of titanium alloy with DB.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 451-466"},"PeriodicalIF":6.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid laser-induced nanostructuring for yeast adhesion-reducing surfaces using beam shaping with SLM","authors":"P. Hauschwitz ,&nbsp;Z. Palkova ,&nbsp;L. Vachova ,&nbsp;R. Bicistova ,&nbsp;M. Prochazka ,&nbsp;V. Plocek ,&nbsp;I. Tarant ,&nbsp;S. Pathak ,&nbsp;J. Brajer ,&nbsp;J. Muzik ,&nbsp;Z. Fialkova ,&nbsp;M. Kocab ,&nbsp;J. Sladek ,&nbsp;M. Flimelova ,&nbsp;M. Smrž ,&nbsp;M. Chyla ,&nbsp;T. Mocek","doi":"10.1016/j.jmrt.2025.01.034","DOIUrl":"10.1016/j.jmrt.2025.01.034","url":null,"abstract":"<div><div>Controlling microbial adhesion in industrial and healthcare settings is crucial for maintaining hygiene and preventing biofilm formation. This work describes a novel method to efficiently produce yeast adhesion-reducing surfaces using dynamic beam-shaping with a spatial light modulator. At first, the laser-induced periodic surface structures (LIPSS) topography was tuned to test microbial adherence in a variety of LIPSS configurations, specifically using <em>Saccharomyces cerevisiae</em> as a model organism. A novel and robust dual-pass laser strategy was implemented to create hierarchical LIPSS structures with periodicities of 630 nm and 5 μm. The integration of dynamic beam shaping with spatial light modulator (SLM) significantly enhanced production efficiency, achieving a throughput of up to 150 cm²/min. The laser-structured surfaces exhibited a significant reduction in yeast adhesion, with a decrease of 95% in adherent cells and achieving a maximum reduction of 99.88%. These findings offer promising implications for developing advanced surface treatments to improve hygiene in industries such as food processing and healthcare, where minimizing microbial colonization is vital.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 193-198"},"PeriodicalIF":6.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of phosphorus and gallium on oxidation resistance of Sn-0.7Cu brazing metal: First-principle calculation and experimental verification","authors":"Lingyue Wang ,&nbsp;He Wei ,&nbsp;Chen Liu ,&nbsp;Shiyu Yang ,&nbsp;Zulai Li ,&nbsp;Min Zha","doi":"10.1016/j.jmrt.2025.01.021","DOIUrl":"10.1016/j.jmrt.2025.01.021","url":null,"abstract":"<div><div>In this paper, the mechanism of the effect of phosphorus and gallium on the oxidation resistance of Sn-0.7Cu brazing alloy was studied based on the calculation of first principles. The calculation shows that the control principle of the anti-oxidation of phosphorus and gallium is that a passivation film is formed on the surface of the substrate, which prevents the subsequent reaction of oxygen in the air with the substrate. Although phosphorus has been shown to be more electronegative, the antioxidant effect of gallium is stronger than that of phosphorus at medium and low oxygen concentrations, because gallium has a lower free energy and is more easily enriched near the passivation film from a kinetic point of view, and its ability to form an oxide layer is stronger than that of phosphorus. The enrichment of doping elements near the passivated film and the antioxidant effect were confirmed by experiments.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 660-674"},"PeriodicalIF":6.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain boundary segregation of solutes and associated plastic deformation mechanisms in nanocrystalline Al–Cu and Al–Mg alloys: A molecular dynamics study","authors":"Zhuojing Liao ,&nbsp;Liang Zhang ,&nbsp;Xiang Hou ,&nbsp;Xiaoxu Huang","doi":"10.1016/j.jmrt.2025.01.018","DOIUrl":"10.1016/j.jmrt.2025.01.018","url":null,"abstract":"<div><div>Grain boundary (GB) solute segregation is an effective strategy for designing strong and stable nanocrystalline Al alloys. Cu and Mg are two well-known alloying elements in Al alloys, but their segregation behavior at extremely fine grain sizes and their effects on deformation mechanisms of nanocrystalline Al are still unclear. In this study, nanocrystalline Al–Cu and Al–Mg alloys models with a range of solute contents were constructed, and the tensile simulation of these models was carried out at different temperatures. The results show that both Cu and Mg tends to segregate at GBs and reduce the excess free volume (EFV) at GBs. Due to different segregation behavior, the GB fraction increases significantly after Cu segregation, whereas the GB fraction changes little after Mg segregation. At different simulated temperatures, the segregation of Cu and Mg at GBs increases the peak stress of nanocrystalline Al by inhibiting GB sliding. With the increase of solute content, solute segregation at GBs leads to a gradual increase trend in peak stress. The strengthening effect of Cu segregation is more obvious than that of Mg, which is related to the smaller EFV of Al–Cu alloys at GB and the greater difficulty of GB sliding. GB sliding is greatly promoted at high temperatures and the strengthening effect of Mg is much reduced. However, Al–Cu alloys still show a significant strengthening effect because Al–Cu alloys have a lower GB diffusion coefficient compared to Al–Mg alloys and are more effective in suppressing GB sliding.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 25-36"},"PeriodicalIF":6.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tribocorrosion behavior of Al-based amorphous coatings prepared by different spraying methods","authors":"Jiachi Yuan ,&nbsp;Zhiyuan Jing ,&nbsp;Zhibin Zhang ,&nbsp;Weiyan Lu ,&nbsp;Suode Zhang ,&nbsp;Yanhai Cheng ,&nbsp;Xiubing Liang","doi":"10.1016/j.jmrt.2025.01.019","DOIUrl":"10.1016/j.jmrt.2025.01.019","url":null,"abstract":"<div><div>The correlation between the wear behavior of three types of Al-based amorphous coatings prepared by low-temperature high-velocity oxygen fuel (LT-HVOF), high-velocity air fuel (HVAF) and cold spraying (CS), and the corrosion behavior of the coatings has been investigated through friction and wear tests under dry friction and 3.5 wt% NaCl solution condition. In the 3.5 wt% NaCl solution, the lubricating effect significantly reduces the friction effect, reducing the coating's wear rate relative to dry friction conditions. In polarized friction conditions, the LT-HVOF coating exhibited passivation characteristics, while the HVAF coating demonstrated a wear rate half that of 34CrMo1A steel, showcasing superior corrosion and wear resistance. In corrosion-wear coupling, the promotion effect of wear on corrosion becomes more apparent.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 220-234"},"PeriodicalIF":6.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of alloying elements on stacking fault energy and softening/hardening of zirconium","authors":"L.C. Liu ,&nbsp;J.T. Zheng ,&nbsp;Z.P. Wu ,&nbsp;Z.Y. Xu ,&nbsp;S.F. Zhou","doi":"10.1016/j.jmrt.2025.01.023","DOIUrl":"10.1016/j.jmrt.2025.01.023","url":null,"abstract":"<div><div>First-principles calculations is used to comparatively study the effects of alloying element (Cr, Fe, Nb, Cu, and Sn) on phase stability, stacking faults energy, and solid-solution softening/hardening of <span><math><mfenced><mn>0001</mn></mfenced><mo>&lt;</mo><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn><mo>&gt;</mo></math></span> and <span><math><mspace></mspace><mo>{</mo><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>0</mn><mo>}</mo><mo>&lt;</mo><mn>11</mn><mover><mn>2</mn><mo>¯</mo></mover><mn>0</mn><mo>&gt;</mo></math></span> slip systems of HCP Zr. Calculations reveal that the introducing Cr, Fe, Nb, and Cu, except Sn, would reduce the thermodynamic stability of Zr. In addition, the adding Sn would either raise or lower the stacking fault energy and ductility of HCP Zr, depending on the specific the slip system. And addition of Fe could hinder the dislocation movement and enhance the solid solution hardening of Zr. It is also demonstrated that the priority of dislocation motion along <span><math><mrow><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>‾</mo></mover><mn>0</mn></mrow><mo>}</mo></mrow><mo>&lt;</mo><mn>11</mn><mover><mn>2</mn><mo>‾</mo></mover><mn>0</mn><mo>&gt;</mo></mrow></math></span> slip system remains unchanged with the incorporation of Cr, Fe, and Nb. Conversely, adding Sn would cause dislocation motion to preferentially follow the <span><math><mrow><mrow><mo>{</mo><mn>0001</mn><mo>}</mo></mrow><mo>&lt;</mo><mn>11</mn><mover><mn>2</mn><mo>‾</mo></mover><mn>0</mn><mo>&gt;</mo></mrow></math></span> slip system. Compared with adding only Sn, the synergistic addition of Sn and Nb (Fe) can significantly improve the softening of Zr and reduce the stacking fault energy of Zr <span><math><mrow><mrow><mo>{</mo><mn>0001</mn><mo>}</mo></mrow><mo>&lt;</mo><mn>11</mn><mover><mn>2</mn><mo>‾</mo></mover><mn>0</mn><mo>&gt;</mo></mrow></math></span> slip system. This study will provide deeper insights into the stacking fault energy and solid solution softening/hardening behaviors of Zr alloys.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 353-359"},"PeriodicalIF":6.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Nb–Ti double microalloying on the grain structure and precipitates of hot compressed FeCrAl alloys","authors":"Xing Fan ,&nbsp;Fei Wang ,&nbsp;Hongming Wang ,&nbsp;Bowen Zhao ,&nbsp;Runze Li ,&nbsp;Jun Zhou","doi":"10.1016/j.jmrt.2025.01.016","DOIUrl":"10.1016/j.jmrt.2025.01.016","url":null,"abstract":"<div><div>Grain coarsening significantly weakens the strength and toughness of FeCrAl alloys at high temperatures. This study focused on the grain refinement behaviour of a Nb–Ti double-microalloyed FeCrAl alloy (Fe–18Cr–6Al‒0.2Ti‒0.2Nb) after hot compression, and the further development of recrystallization grain size during heat treatment was also explored at temperatures of 1100 °C and 1250 °C for 1 and 6 h. Strain-induced Nb-rich and Ti-rich precipitates located at grain boundaries and/or subgrain boundaries influenced dynamic recrystallization during hot compression regardless of parameters such as the strain rate and initial grain size. Additionally, incomplete recrystallization was observed at 1100 °C, with a limited increase in the grain size and a decrease in the size and volume fraction of the Nb-rich and Ti-rich precipitates. Increasing the heating temperature accelerated discontinuous recrystallization, leading to a decrease in the internal dislocation density and hardness. This indicates that the addition of Nb and Ti significantly refined the recrystallized grain size while limiting their growth at high temperatures, which improved the mechanical properties of the Nb–Ti–FeCrAl alloy in high-temperature applications.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 928-941"},"PeriodicalIF":6.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced irradiation swelling resistance in low activation Ti8VCrMnFeCu2 high entropy alloys: Exploring the role of heterogeneous nanoparticles","authors":"Yao Yu ,&nbsp;Xiao Liu ,&nbsp;Qianqian Wang ,&nbsp;Qigui Yang ,&nbsp;Ye Dong ,&nbsp;Te Zhu ,&nbsp;Peng Zhang ,&nbsp;Runsheng Yu ,&nbsp;Mingpan Wan ,&nbsp;Xingzhong Cao","doi":"10.1016/j.jmrt.2025.01.022","DOIUrl":"10.1016/j.jmrt.2025.01.022","url":null,"abstract":"<div><div>This study presents an in-depth analysis on the microstructural evolution of the low-activation Ti₈VCrMnFeCu₂ alloy under helium irradiation. The irradiation-induced vacancies and the change of Cu nanoprecipitates were characterized using slow positron-beam Doppler broadening spectroscopy (DBS) and transmission electron microscopy (TEM). It is revealed that the effective open volume of defects induced by helium irradiation was inhibited at room temperature even at a relatively high dose (3 × 10¹⁷ ions/cm², ∼10.5 dpa). This is attributed to the formation of He_mV_n, which effectively decreases migration and aggregation of vacancies. Moreover, TEM results clearly illustrate the enhanced swelling resistance exhibited in the alloy. The estimated swelling rate is ∼0.092%/dpa with 1 × 10¹⁷ ions/cm² at 723 K. This study demonstrates that Cu nanoprecipitates can effectively serve as traps for helium bubbles, as they capture helium atoms and inhibit their diffusion.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 344-352"},"PeriodicalIF":6.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The use of nano-structured cellulose to improve plywood: A review","authors":"L.C. Lirya Silva ,&nbsp;F.O. Lima ,&nbsp;S.N. Monteiro ,&nbsp;A.R.G. Azevedo ,&nbsp;A.L. Christoforo ,&nbsp;B.S. Ferreira ,&nbsp;D. Goveia ,&nbsp;C.I. de Campos","doi":"10.1016/j.jmrt.2025.01.025","DOIUrl":"10.1016/j.jmrt.2025.01.025","url":null,"abstract":"<div><div>The great availability of forest resources in Brazil enables the constant growth of industrial sectors that employ wood as a raw material. Hence, several products and production techniques were developed to maximize the availability of this resource, giving rise to wood-based panels and highlighting plywood as a structural use. The use of nanomaterials appears as an alternative to improve wood products. Among these nanomaterials, nano-structured cellulose has stood out for its high strength and stiffness. In this sense, this article aims to present a literature review regarding the use and effects of nanocellulose in plywood panels based on a systematic searching of keywords related to nano-structured cellulose in plywood employment on the Scopus website. An initial search from 1950 was performed with the keyword “cellulose.” A subsequent search included the acronym “plywood” combined with terms such as “nanocellulose,” “cellulose nanocrystals,” and “cellulose nanofibrils.” The Virtual Operating System (VOS) Viewer was used to develop a graphical mapping. The main authors were selected for an in-depth analysis of their results. Thus, it was concluded that most authors observed, for both nanocrystals and cellulose nanofibers, an increase in the adhesive viscosity as well as an improvement in the mechanical properties, especially regarding tensile shear strength and bonding quality, for 0.038, 1, 3, and 5% of nanocellulose. Some authors have also achieved a reduction in formaldehyde emissions. Therefore, using nanofibers and cellulose nanocrystals can be considered sustainable alternatives for the wood-based panel industry, improving the mechanical properties and reducing toxic emissions.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 392-401"},"PeriodicalIF":6.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significant improvement of strain hardening through massive interfaces in heterogeneous lamellar structured complex-concentrated alloys","authors":"Tae Jin Jang ,&nbsp;You Na Lee ,&nbsp;Ju-Hyun Baek ,&nbsp;Sang-Ho Oh ,&nbsp;Yeon Taek Choi ,&nbsp;Byeong-Joo Lee ,&nbsp;Hyoung Seop Kim ,&nbsp;Alireza Zargaran ,&nbsp;Seok Su Sohn","doi":"10.1016/j.jmrt.2025.01.012","DOIUrl":"10.1016/j.jmrt.2025.01.012","url":null,"abstract":"<div><div>Ultra-fine-grained CoNiMo alloys with varying Mo contents (12, 15, and 18 at.%) were fabricated through high-pressure torsion followed by short-time annealing. The alloys exhibited complex lamellar structures within the grain interiors, characterized by a high density of coherent twin boundaries and interfaces between face-centered cubic and hexagonal close-packed phases. Refinement of complex lamellar structure with increasing Mo content leads to significant improvements in tensile properties, achieving a tensile strength of 1680 MPa and a uniform elongation of 11.7%. The enhanced strain-hardening behavior is attributed to the dislocation storage capability of the complex lamellar structure and heterogeneous deformation between the face-centered cubic and hexagonal close-packed phases. This work demonstrates the synergistic effects of massive boundaries with strong coherency and heterogeneous deformation to overcome the strength–ductility trade-off in metallic materials.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"35 ","pages":"Pages 176-184"},"PeriodicalIF":6.2,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}