Materials Science and Engineering: A最新文献

{"title":"In-situ high modulus steel strengthened with Ni3Ti nano-precipitation","authors":"Cainv Ma,&nbsp;Yizhuang Li,&nbsp;Jialin Chen,&nbsp;Hongshuang Di,&nbsp;Wei Xu","doi":"10.1016/j.msea.2025.148355","DOIUrl":"10.1016/j.msea.2025.148355","url":null,"abstract":"<div><div>The low yield strength of high modulus steels (HMSs) hampers their practical applications as high-rigid structural materials in key sectors such as construction and transportation. To address this challenge, we introduce a small amount of nickel into the Fe-Ti-B alloy system, leveraging the strengthening concept of maraging steels without significantly increasing alloying costs. The resulting Ni-added HMS, in its as-hot-rolled state and reinforced with TiB₂, contains dense Ni₃Ti nanoprecipitates within the ferrite matrix. These nanoprecipitates effectively shorten dislocation segments, thereby increasing the flow stress required for the continuous dislocation movement. Meanwhile, this new HMS maintains a high Young's modulus and low density, comparable to existing Fe-TiB₂ steel. This work offers a viable approach to producing cost-effective high modulus steels with enhanced strength levels suitable for structural applications.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148355"},"PeriodicalIF":6.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 microstructure and strengthening mechanisms of medium-entropy alloy FeCoNiCr particle reinforced titanium composites","authors":"Yizhou Tang,&nbsp;Faming Zhang,&nbsp;Yifeng Xiong,&nbsp;Yuhang Hu,&nbsp;Huiya Feng","doi":"10.1016/j.msea.2025.148359","DOIUrl":"10.1016/j.msea.2025.148359","url":null,"abstract":"<div><div>The matrix and interface of Titanium Matrix Composites (TMCs) have posed significant challenges in material science. Unlike traditional ceramic particle-reinforced TMCs, this study achieved enhanced interface bonding and multiple strengthening effects through solid-solution and secondary phase strengthening with medium-entropy alloy (MEA) particle of FeCoNiCr fabricated by spark plasma sintering (SPS). The microstructure, features of interface layer, mechanical properties and strengthening mechanisms were investigated. Experimental results revealed that the interface layer comprised a multilayer FCC solid solution and σ-phase structure formed by the interaction between the FeCoNiCr and the Ti6Al4V matrix, along with microstructural features such as stacking faults and twins. The tensile strength, yield strength and hardness of the composites improved with increasing MEA content. The optimal balance of strength and ductility was achieved at 3 wt% MEA, yielding an unprecedented tensile strength of 1162 MPa and elongation of 11 %. These improvements are attributed to grain refinement, Orowan strengthening and solid solution strengthening. The formation of a multilayer complex structure at the MEA/matrix interface addressed the limitations of poor bonding in ceramic particle-reinforced TMCs, offering a significant advancement in composite material design.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148359"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formability limits and fracture mechanisms in AA5182 Al-Mg sheets under room and cryogenic temperature conditions","authors":"John Magliaro ,&nbsp;Amir M.K. Behtash ,&nbsp;Ahmet T. Alpas","doi":"10.1016/j.msea.2025.148388","DOIUrl":"10.1016/j.msea.2025.148388","url":null,"abstract":"<div><div>The formability of in-demand Al-Mg alloys, such as AA5182, is constrained by the Portevin-Le Chatelier (PLC) effect, which manifests as serrated plastic flow due to dynamic strain aging (DSA) from solute-dislocation interactions. This phenomenon contributes to the premature onset of necking (i.e., reduced ductility) and surface defects, hindering the broader application of these alloys in lightweight structural components. The formability limits and fracture mechanisms for AA5182 sheets subjected to uniaxial tension and Erichsen punch forming were investigated under room temperature (293 K) and cryogenic (77 K) conditions. The cryogenic tensile fracture strain and flow stress increased by 47 % and 91 %, respectively, the Considère necking criterion was globally satisfied and surface wrinkling was fully prevented. Cryogenic forming limit diagrams (FLDs) were obtained for the first time for AA5182 sheet material using the Erichsen punch tests. The major strain limits increased by 18 %, 43 % and 27 % for uniaxial (drawing), plane strain and biaxial stretching strain paths, respectively, compared to room temperature conditions. Optical microscopy of the through-thickness microstructure confirmed that PLC suppression at 77 K prevented unstable interactions with opposing shear planes, promoting more uniform strain distribution and sheet thinning. Scanning electron microscopy of the fractured edges revealed a higher frequency of dimple initiation sites and 29 % greater dimpled area post-forming under cryogenic conditions due to delayed fracture and correspondingly increased void formation and growth. The average post-forming surface roughness was also reduced (improved) by a factor of 5, representing the difference between Class B and Class A surface finishes.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"936 ","pages":"Article 148388"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced strength-ductility synergy in multilayered aluminum via integrating dual-heterogeneous structures","authors":"Huijun Fang ,&nbsp;Hushaoxiao Jiang ,&nbsp;Xin Bai ,&nbsp;Yuhang Wang ,&nbsp;Xinbo Ni ,&nbsp;Xuewen Li ,&nbsp;Hao Wu ,&nbsp;Wujing Fu ,&nbsp;Guohua Fan ,&nbsp;Yiping Xia","doi":"10.1016/j.msea.2025.148379","DOIUrl":"10.1016/j.msea.2025.148379","url":null,"abstract":"<div><div>Tailoring multi-type or multi-scale heterogeneous structures offers a promising pathway to overcome the strength-ductility trade-off in metallic materials. In this study, a dual-heterogeneous structure is developed within AA3003/AA1060 multilayered aluminum via simply controlled annealing temperatures, synergizing bimodal grain distributions (fine/coarse grains with micro-scale contrast) within multilayered frameworks. Compared to the single multilayered sample, the dual-heterogeneous sample achieve a notable improvement in the uniform elongation (from 9.8 % to 15.5 %), with only a marginal reduction in yield strength (∼13 MPa). Comprehensive microstructural analyses reveal that tailored nano dispersoid redistribution within AA3003 layers enables preferential growth of partially recrystallized grains, responsible for the inclusion of the bimodal structure. By analyzing the dislocation structures upon the tensile deformation, it is found that the heterogeneous interfaces of bimodal structure can accumulate more geometrically necessary dislocations (GNDs) than conventional layered interfaces, also show a superior capacity of dislocation multiplications. These microstructural features can explain the enhanced work hardening capacity in the dual-heterogeneous structure. This work can contribute valuable insights into the design strategies for heterogeneous metals, aiming at a superior mechanical performance.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148379"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toughening nitride hard coatings by deflecting cracks along grain boundaries","authors":"Yinxia Zhang ,&nbsp;Matthias Bartosik ,&nbsp;Steffen Brinckmann ,&nbsp;Subin Lee ,&nbsp;Christoph Kirchlechner","doi":"10.1016/j.msea.2025.148392","DOIUrl":"10.1016/j.msea.2025.148392","url":null,"abstract":"<div><div>Grain boundaries (GBs) in hard coatings are often considered as the weakest link, acting as preferred pathways for crack propagation and thereby limiting the coating's fracture toughness. In this study, we investigate whether continuous crack deflection along GBs can mitigate this limitation and enhance the fracture resistance of hard coatings. Three model systems were examined: CrN, AlN and their multilayered structure coatings, all characterized by columnar GB structures. Fracture toughness was quantitatively assessed using an <em>in situ</em> SEM micro-cantilever fracture testing. The key approach of this study is the use of two different loading geometries, with notches aligned either parallel or perpendicular to the coating's growth direction, allowing us to compare the influence of the crack propagation direction and deflection. Across all three systems, the perpendicular notch configuration—aligned across the columnar microstructure—resulted in approximately 8 % higher fracture toughness. This enhancement is attributed to continuous crack deflection along GBs during deformation. Additionally, the extent of crack deflection was found to depend on the local GB arrangement, with transgranular fracture observed when no well-aligned GBs were present along the crack path. These findings provide quantitative insights into the toughening mechanisms enabled by GB-mediated crack deflection and offer design strategies for mechanically robust hard coatings.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148392"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving the microstructure and properties of a high-alloyed Al-Zn-Mg-Cu alloy by optimizing the initial temperature of Pre-recovery multi-stage solution treatment (P-MST)","authors":"Qingshan Zhou ,&nbsp;Xiaojing Xu ,&nbsp;Can Li","doi":"10.1016/j.msea.2025.148357","DOIUrl":"10.1016/j.msea.2025.148357","url":null,"abstract":"<div><div>This study proposed a new strategy to improve the microstructure and properties of Al-Zn-Mg-Cu alloy via optimizing the initial temperature of pre-recovery multi-stage solution treatment (P-MST, T0°C/12h + 350 °C/12h + 450 °C/2h + 460 °C/2h + 470 °C/2h). This optimization facilitated the adjustment of dislocation density, element solubility, and grain size, resulting in a significant increase in mechanical properties and corrosion resistance. The research found that during the T0°C/12h + 350 °C/12h stage, as the T0 temperature increased, the alloy's dislocation density initially decreased before rising again. The minimum point was achieved at T0 of 300 °C, which led to the lowest driving force for grain growth in the subsequent MST, resulting in the smallest grain size and best corrosion resistance in the T6-aging state. Additionally, during the T0°C/12h and T0°C/12h + 350 °C/12h stages, with a rise in T0 temperature, the average size of the second phase gradually increased. The highest elemental solubility of the matrix after MST occurred at T0 of 300 °C, promoting the alloy to demonstrate the maximum aging precipitation strengthening. Nevertheless, at T0 of 250 °C, the alloy, after T6-aging treatment, presented the lowest dislocation density, thereby achieving the highest strain-hardening capacity and plasticity. At T0 of 250 °C and 300 °C, the alloy exhibited superior properties, with the yield strength of 774 MPa and 803 MPa, the ultimate tensile strength of 802 MPa and 823 MPa, the elongation of 10.1 % and 6.9 %, and the corrosion current density of 1.37 × 10⁻⁶ A cm⁻² and 2.44 × 10⁻⁶ A cm⁻² in 3.5 wt % NaCl solution, respectively.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148357"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructural evolution and mechanical properties of Y2O3 reinforced IN718 superalloys fabricated by laser directed energy deposition","authors":"Kuo Zhang ,&nbsp;Xiaofeng Dang ,&nbsp;Taikang Shi ,&nbsp;Mengyang Li ,&nbsp;Zeng Tian ,&nbsp;Longchao Huang ,&nbsp;Guangni Zhou ,&nbsp;Hongfei Zhang ,&nbsp;Lingzhi Ning ,&nbsp;Dingrui Liu ,&nbsp;Yao Li ,&nbsp;Fengying Zhang","doi":"10.1016/j.msea.2025.148397","DOIUrl":"10.1016/j.msea.2025.148397","url":null,"abstract":"<div><div>Laser directed energy deposition (LDED) presents a promising approach for fabricating and repairing intricate components made from oxide dispersion-strengthened nickel-based superalloys. However, the evolution of oxides during the LDED process and their contributions to the mechanical properties remain insufficiently explored. This study investigated the effects of Y₂O₃ additions on the microstructure and mechanical properties of as-received and heat-treated states IN718 alloys and the evolution mechanism of Y₂O₃ in the melt pool. During the LDED process, a certain fraction of Y₂O₃ melts and decomposes in the melt pool, reacting in situ with Al to form Al₂O₃-Y₄Al₂O₉ composite oxides. The Y₂O₃ and composite oxide nanoparticles act as heterogeneous nucleation sites, refining the dendritic and grain structures. With increasing the Y₂O₃ addition, the strength of the alloys increases. Notably, the IN718 alloys with 1.0 wt% Y₂O₃ achieve the optimal strength-toughness balance, elevating the room temperature yield strength by 35.7% compared to the as-received sample without Y₂O₃ addition. After heat treatment, the IN718 alloys with 1.0 wt% Y₂O₃ elevate the room temperature yield strength by 4.9% and the high temperature yield strength by 13.4% while exhibiting a more pronounced dynamic strain aging effect than the sample without Y₂O₃ addition. Besides, the oxides showcase a certain deformability owing to the presence of dislocations in the interior, thereby preventing the crack nucleation near the oxides upon tensile straining. This study provides novel insights into enhancing the mechanical properties of additively manufactured IN718 alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148397"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creep behavior and microstructure evolution of a novel Ni-Co-based superalloy with long-life designed for high temperature application","authors":"Yongchao Gai ,&nbsp;Rui Zhang ,&nbsp;Chuanyong Cui ,&nbsp;Zijian Zhou ,&nbsp;Xipeng Tao ,&nbsp;Yi Tan ,&nbsp;Yizhou Zhou","doi":"10.1016/j.msea.2025.148396","DOIUrl":"10.1016/j.msea.2025.148396","url":null,"abstract":"<div><div>To provide guidance for the design of high-temperature and long-life wrought superalloys, the microstructure evolution and deformation behavior at high temperature and long-term creep of a novel Ni-Co-based superalloy was investigated. The results showed that the formation of precipitate free zones (PFZ) at grain boundaries (GBs) during long-term creep would facilitate the nucleation of micropores along with the microporous aggregation fracture. Subsequently, the evolution behavior of GBs during the high-temperature and long-term creep was characterized using EBSD, EDS and TEM, revealed the underlying mechanism of PFZ formation. It is mainly attributed to strain-induced GBs migration, which is governed by diffusion. Additionally, dynamic recrystallization (DRX) within PFZs was observed during long-term creep. The DRX mechanism in PFZ is a continuous-DRX with progressive rotation of the crystal lattice. Besides, the secondary γ′ phases within the grain exhibit evidence of rafting, which is closely associated with the deformation mechanism within the grain, primarily attributed to the abundant dislocations surrounding the γ′ phases serving as efficient pathways for elements diffusion.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148396"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intermediate temperature embrittlement of a solution treated Nimonic 105 superalloy","authors":"Tao Peng ,&nbsp;Changfeng Dong ,&nbsp;Dongsheng Xie ,&nbsp;Changqing Teng ,&nbsp;Lu Wu ,&nbsp;Gang Yang","doi":"10.1016/j.msea.2025.148394","DOIUrl":"10.1016/j.msea.2025.148394","url":null,"abstract":"<div><div>The tensile properties of Nimonic 105 alloy after solution treatment at 1150 °C was studied by tensile tests at temperatures between room temperature and 900 °C, and the intermediate temperature embrittlement mechanism of the alloy was investigated through microstructure observation utilizing scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results revealed that the ultimate tensile strength of the alloy dropped with increasing temperature, while the yield strength remained basically unchanged below 800 °C, above which it reduced sharply. The elongation decreased markedly above 600 °C, and then enhanced gradually with further increasing temperature after reaching a minimum at temperatures of 750–800 °C. TEM examination showed that the primary deformation mechanism was shearing of γ′ precipitates by coupled dislocation pairs below 800 °C, and it changed to Orowan bowing combined with climb and cross-slip of dislocations above this temperature. The ductility minimum of the alloy at 750–800 °C resulted mainly from the precipitation of M₂₃C₆ carbides at the grain boundaries and grain boundary segregation of S.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"935 ","pages":"Article 148394"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Twinning and kinking behaviors of α-uranium under high strain rate compression","authors":"Sheng Zhang,&nbsp;Mengsheng Zhai,&nbsp;Ping Zhou,&nbsp;Bin Su,&nbsp;Shilv Yu,&nbsp;Wenliang Xu,&nbsp;Shihao Su,&nbsp;Dongli Zou,&nbsp;Dawu Xiao","doi":"10.1016/j.msea.2025.148389","DOIUrl":"10.1016/j.msea.2025.148389","url":null,"abstract":"<div><div>Uranium (U) and its alloys are frequently subjected to dynamic deformation during their applications in nuclear industry. Owning to the low-symmetry crystal structure of α-U (the allotropic form of uranium stable up to 940 K), twinning and kinking play critical roles in its dynamic plastic deformation. However, the twinning and kinking behaviors of α-U under dynamic deformation have not yet been fully understood. In this work, we employed a split Hopkinson pressure bar (SHPB) to dynamically compress coarse-grained α-U to strains of 5%, 15%, 25%, and 27%. The resulting twin and kink bands were characterized using electron back-scatter diffraction (EBSD). Our results reveal that both the width and density of twins increase with increasing impact strain. Four types of twins were identified: {130}, <span><math><mrow><mi>ʹ</mi><mrow><mo>{</mo><mrow><mn>1</mn><mover><mn>7</mn><mo>‾</mo></mover><mn>2</mn></mrow><mo>}</mo></mrow><mi>ʹ</mi></mrow></math></span>, {112}, and <span><math><mrow><mi>ʹ</mi><mrow><mo>{</mo><mrow><mn>1</mn><mover><mn>7</mn><mo>‾</mo></mover><mn>6</mn></mrow><mo>}</mo></mrow><mi>ʹ</mi></mrow></math></span>. Kink bands emerged after 15% impact strain, with their boundaries perpendicular to the [100] direction of matrix and their [100] directions oriented at a 45° angle relative to that of matrix. The {130}, <span><math><mrow><mi>ʹ</mi><mrow><mo>{</mo><mrow><mn>1</mn><mover><mn>7</mn><mo>‾</mo></mover><mn>2</mn></mrow><mo>}</mo></mrow><mi>ʹ</mi></mrow></math></span>, and {112} twins were observed within the kink bands, and the {112} twins inside the kink bands were found to initiate secondary {130} twin. Fine and randomly oriented grains were observed inside the adiabatic shear bands of α-U. Based on these findings, we propose a twin-induced rotational dynamic recrystallization to describe the formation of adiabatic shear band in uranium. This study provides new insights into the plastic deformation mechanisms of uranium under dynamic loading.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"936 ","pages":"Article 148389"},"PeriodicalIF":6.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}