Journal of Advanced Joining Processes最新文献_第4页

Mechanistic insight into cooling-rate-driven bubble evolution and interfacial bonding strength in directly bonded Ti–PET materials 直接结合Ti-PET材料中冷却速率驱动气泡演化和界面结合强度的机理研究

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-08-18 DOI: 10.1016/j.jajp.2025.100345

Katsuyoshi Kondoh , Nodoka Nishimura , Kazuki Shitara , Shota Kariya , Ke Chen , Abdillah Sani Bin Mohd Najib , Junko Umeda

{"title":"Mechanistic insight into cooling-rate-driven bubble evolution and interfacial bonding strength in directly bonded Ti–PET materials","authors":"Katsuyoshi Kondoh , Nodoka Nishimura , Kazuki Shitara , Shota Kariya , Ke Chen , Abdillah Sani Bin Mohd Najib , Junko Umeda","doi":"10.1016/j.jajp.2025.100345","DOIUrl":"10.1016/j.jajp.2025.100345","url":null,"abstract":"<div><div>This study elucidates the mechanistic relationship between cooling rate and interfacial bubble evolution in direct bonding of commercially pure titanium (Ti) to polyethylene terephthalate (PET). Joints were fabricated via a thermal press-bonding process under two distinct cooling regimes—rapid and slow cooling—and the dynamic behavior of residual gas bubbles was analyzed through in-situ optical observation. Slow cooling was found to markedly reduce both the size and population density of interfacial bubbles, attributed to enhanced gas re-dissolution and diffusion within the softened PET matrix at elevated temperatures. Quantitative image analysis revealed that the bubble area fraction decreased by >50 % under slow cooling conditions. Tensile shear testing showed that joints fabricated under slow cooling exhibited significantly higher bond strength—up to 1.5 times greater than those produced under rapid cooling—highlighting the deleterious role of residual bubbles as interfacial defects. Fractographic observations further indicated that slow cooling altered bubble morphology from network-like, dome-shaped structures to isolated, spherical forms, thereby increasing the effective bonded area and promoting interfacial adhesion. These findings provide critical insight into thermally driven interfacial phenomena in metal–polymer joining and underscore the importance of thermal management strategies for optimizing joint integrity.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100345"},"PeriodicalIF":4.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-driven parameter optimization for bead geometry in wire arc additive manufacturing of 17-4 PH stainless steel 17-4 PH不锈钢丝弧增材制造中焊头几何参数的数据驱动优化

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-05-30 DOI: 10.1016/j.jajp.2025.100319

Muhammad Irfan , Yun-Fei Fu , Shalini Singh , Sajid Ullah Butt , Abul Fazal Arif , Osezua Ibhadode , Ahmed Qureshi

{"title":"Data-driven parameter optimization for bead geometry in wire arc additive manufacturing of 17-4 PH stainless steel","authors":"Muhammad Irfan , Yun-Fei Fu , Shalini Singh , Sajid Ullah Butt , Abul Fazal Arif , Osezua Ibhadode , Ahmed Qureshi","doi":"10.1016/j.jajp.2025.100319","DOIUrl":"10.1016/j.jajp.2025.100319","url":null,"abstract":"<div><div>Due to its high strength, corrosion resistance, and toughness, 17-4 Precipitation Hardening (PH) stainless steel is widely used in aerospace, petrochemical, and marine industries. Additive manufacturing (AM) technologies enable the fabrication of complex and/or customized components while offering superior material efficiency and shorter lead times. Because of its high deposition rate, Wire Arc Additive Manufacturing (WAAM) can produce large metal structures. However, consistent bead profiles remain challenging because the process is highly sensitive to variations in thermal input and deposition conditions. Achieving uniform bead geometry during additive manufacturing is essential to avoid defects such as humming, spattering, and distortion, which can compromise the structural integrity of 3D components.</div><div>To achieve a uniform bead profile in WAAM, in this study, a full-factorial design of experiments is implemented to optimize the process parameters such as Wire Feed Rate (WFR), Torch Travel Speed (TTS), and Gas Flow Rate (GFR) for 17-4PH stainless steel. A backpropagation neural network (BPNN) is trained to model a non-linear relationship between these process parameters and bead geometry. Moreover, a genetic algorithm (GA) optimizes for bead uniformity and deposition efficiency. With a Pearson Correlation Coefficient (PCC) of 0.85, the optimized parameters exhibited significantly improved uniformity and higher deposition efficiency.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100319"},"PeriodicalIF":3.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties of intermetallic compounds at solder joint interfaces investigated using nanoindentation technique 利用纳米压痕技术研究了焊点界面金属间化合物的力学性能

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-10-27 DOI: 10.1016/j.jajp.2025.100356

Wei-Rong Yang , Kiyokazu Yasuda , Jenn-Ming Song

引用次数: 0

Visualization of material flow in one-step double-acting FSW of AA1100: role of tracer type and morphology AA1100一步双作用FSW物料流可视化：示踪剂类型和形态的作用

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-09-16 DOI: 10.1016/j.jajp.2025.100349

Eko Prasetya Budiana, Anas Fikri Makarim, Heru Sukanto, Nurul Muhayat, Triyono

{"title":"Visualization of material flow in one-step double-acting FSW of AA1100: role of tracer type and morphology","authors":"Eko Prasetya Budiana, Anas Fikri Makarim, Heru Sukanto, Nurul Muhayat, Triyono","doi":"10.1016/j.jajp.2025.100349","DOIUrl":"10.1016/j.jajp.2025.100349","url":null,"abstract":"<div><div>Aluminum is widely used in industry due to its lightweight, high strength, and cost-effectiveness. However, conventional fusion welding of aluminum often results in porosity defects. One-step Double-Acting Friction Stir Welding (ODFSW) is an advancement of the FSW technique that enables simultaneous double-sided welding in a single pass at sub-melting temperatures, thereby overcoming porosity issues in fusion welding while also addressing challenges in single-sided FSW of thicker plates, such as incomplete penetration and root flaws. The quality of ODFSW joints is strongly influenced by the material flow behavior during welding. To investigate this flow, the Tracer Insert Technique was employed. This study examines the effect of tracer material type and form on the visibility of material flow in ODFSW of AA1100 aluminum with a 1 mm pin overlap. Three types of tracers were used: SiO₂ powder, AA6061 powder, and ER5356 wire. Results revealed that powder-form tracers, particularly AA6061, provided better visualization due to more uniform distribution and higher color contrast caused by the presence of Mg₂Si precipitates. Multi-Attribute Decision Making (MADM) evaluation identified AA6061 as the most effective tracer, exhibiting minimal defects. Material flow visualization indicated distinct patterns, including flow from the advancing side (AS) to the retreating side (RS), material accumulation at the weld exit, onion ring formation, microvoids at pin tips, and homogeneous mixing in the mid-plate region. Additionally, a funnel-shaped flow profile and material concentration at the mid-thickness zone were observed, attributed to the mechanical interaction between the upper and lower tools.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100349"},"PeriodicalIF":4.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of bonding temperature on microstructure and mechanical properties of TLP-bonded Ti-6Al-4V/Inconel 718 joints using BNi2/Cu interlayer 结合温度对BNi2/Cu夹层Ti-6Al-4V/Inconel 718 tlp结合接头组织和力学性能的影响

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-07-06 DOI: 10.1016/j.jajp.2025.100328

Sepehr Pourmorad Kaleybar, Hamid Khorsand

{"title":"Effect of bonding temperature on microstructure and mechanical properties of TLP-bonded Ti-6Al-4V/Inconel 718 joints using BNi2/Cu interlayer","authors":"Sepehr Pourmorad Kaleybar, Hamid Khorsand","doi":"10.1016/j.jajp.2025.100328","DOIUrl":"10.1016/j.jajp.2025.100328","url":null,"abstract":"<div><div>The joining of Ti-6Al-4 V to Inconel 718 is notable in industries. This research studied the effect of bonding temperatures (800, 850, 900, 950, and 1000 °C) on properties of Ti-6Al-4 V and Inconel 718 joints using BNi2/Cu interlayer in TLP bonding. The samples were analyzed for their microstructure and mechanical properties using a range of techniques: optical microscopy (OM), scanning electron microscope (SEM), X-ray diffraction (XRD), microhardness testing, shear strength evaluation, and high-temperature shear tests. Microstructural analysis indicated the formation of intermetallic compounds like Ti2Cu, Ti<sub>2</sub>Ni, NiTi, and Ni<sub>3</sub>Ti within the diffusion-affected zone (DAZ) and solidification zone (SZ) of the TLP-bonded samples. The results demonstrated that temperature had a profound impact on the microstructure of the TLP-bonded samples; specifically, the width of the solidification zone increased as the TLP temperature rose. Moreover, there was an optimal temperature for achieving superior mechanical properties. For instance, a shear strength of 399.75 MPa was achieved at 950 °C as the highest shear strength value. The findings also revealed that both lower (800 °C) and higher (1000 °C) bonding temperatures led to decreased shear strength due to the presence of porosities and cracks. The high-temperature testing showed suitable mechanical properties for elevated temperatures.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100328"},"PeriodicalIF":3.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The role of pressure in improving the properties of friction welded aluminum–copper dissimilar joints 压力对改善铝铜异种摩擦焊接接头性能的作用

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-07-06 DOI: 10.1016/j.jajp.2025.100329

Riyan Ariyansah , Aditya Rio Prabowo , Nurul Muhayat , Bagus Anang Nugroho , Triyono

{"title":"The role of pressure in improving the properties of friction welded aluminum–copper dissimilar joints","authors":"Riyan Ariyansah , Aditya Rio Prabowo , Nurul Muhayat , Bagus Anang Nugroho , Triyono","doi":"10.1016/j.jajp.2025.100329","DOIUrl":"10.1016/j.jajp.2025.100329","url":null,"abstract":"<div><div>Rotary Friction Welding (RFW) is a solid-state joining technique well-suited for dissimilar metals such as aluminum and copper, despite challenges related to differences in electrochemical potential, thermal conductivity, and mechanical properties. While previous studies have explored the influence of process parameters on joint quality, limited attention has been given to the systematic optimization of axial pressure in relation to intermetallic compound (IMC) formation and mechanical performance. This study investigates the effect of varying axial pressures (20, 30, and 40 kg/cm²) on the microstructure and mechanical behavior of rotary friction-welded joints between 6061 aluminum and pure copper. The welding parameters, including rotational speed (1300 rpm), friction time (45 s), and pressure time (30 s), were held constant to isolate the effect of pressure. Macro and microstructural analyses, along with hardness and tensile testing, were conducted. The results show that axial pressure significantly influences the morphology and thickness of IMCs formed in the central weld zone (CWZ), thereby affecting joint strength. Notably, a friction pressure of 20 kg/cm² was found to be optimal, yielding the highest combination of hardness and tensile strength compared to other specimens, thus demonstrating a good balance between metallurgical bonding and mechanical performance. Compared to similar studies, this work demonstrates improved mechanical performance at a lower IMC thickness, highlighting the importance of pressure optimization in balancing metallurgical bonding with mechanical integrity. The novelty of this research lies in identifying the critical role of pressure in tailoring IMC development and optimizing joint strength for aluminum-copper dissimilar metal welding.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100329"},"PeriodicalIF":3.8,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring microstructure and interface integrity in Ti–316L dissimilar keyhole laser welding using controlled 3d magnetic field stimulation 利用可控三维磁场刺激调整Ti-316L异种锁孔激光焊接的微观结构和界面完整性

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-09-30 DOI: 10.1016/j.jajp.2025.100352

Pinku Yadav , Simone Gervasoni , David Sargent , Patrik Hoffmann , Sergey Shevchik

{"title":"Tailoring microstructure and interface integrity in Ti–316L dissimilar keyhole laser welding using controlled 3d magnetic field stimulation","authors":"Pinku Yadav , Simone Gervasoni , David Sargent , Patrik Hoffmann , Sergey Shevchik","doi":"10.1016/j.jajp.2025.100352","DOIUrl":"10.1016/j.jajp.2025.100352","url":null,"abstract":"<div><div>This study investigates the influence of externally applied magnetic fields—both alternating and rotating—on the microstructural evolution and interface integrity of laser-welded dissimilar joints between titanium and 316 L stainless steel. A fiber laser system was employed to perform keyhole-mode lap welding, with various magnetic field orientations introduced to actively manipulate the melt pool dynamics. Alternating fields (Bx, By, Bz) promoted grain refinement (reducing average grain size from 51.8 ± 4.1 µm to 36.2 ± 3.1 µm) and enhanced recrystallization (increasing the recrystallized fraction to ∼0.69), resulting in a finer microstructure and more discrete intermetallic compound (IMC) formation at the Ti–316 L interface. In contrast, rotating magnetic fields (Bxy, Byz, Bxz) encouraged coarser grain growth (increasing average grain size up to 80.1 ± 4.5 µm) and increased the presence of unrecrystallized regions (up to 0.484 fraction) due to stabilized melt flow and slower cooling rates. These conditions facilitated deeper interdiffusion and led to thicker, more continuous IMC layers, correlating with a peak microhardness of 576 ± 8 HV, potentially compromising joint integrity. The findings demonstrate that precise control of magnetic field configuration during laser processing offers a powerful tool to tailor interfacial microstructures and minimize brittle phase formation. This approach provides new opportunities to enhance the performance and reliability of dissimilar metal joints in critical structural applications.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100352"},"PeriodicalIF":4.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective optimization of welding-induced residual stress and deflection in 6082-T6 aluminum alloy using validated thermo-mechanical modeling 基于验证热力学模型的6082-T6铝合金焊接残余应力和挠度多目标优化

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-09-23 DOI: 10.1016/j.jajp.2025.100351

Hamidreza Rohani Raftar , Amir Khodabakhshi , Tomi Suikkari , Antti Ahola , Tuomas Skriko

{"title":"Multi-objective optimization of welding-induced residual stress and deflection in 6082-T6 aluminum alloy using validated thermo-mechanical modeling","authors":"Hamidreza Rohani Raftar , Amir Khodabakhshi , Tomi Suikkari , Antti Ahola , Tuomas Skriko","doi":"10.1016/j.jajp.2025.100351","DOIUrl":"10.1016/j.jajp.2025.100351","url":null,"abstract":"<div><div>Welding of aluminum alloys often introduces residual stress and deflection, compromising dimensional precision and structural performance. This study investigates the influence of key process parameters of gas metal arc welding on the thermo-mechanical response of 6082-T6 aluminum alloy butt joints. A numerical method was developed and validated using experimental measurements of temperature distribution (thermocouples), deflection (3D laser scanning), and residual stress(X-ray diffraction). A full-factorial design of experiments (DOE) was conducted, varying clamping configuration, plate thickness, welding sequence, and cooling conditions. Analysis of variance (ANOVA) quantified main and interaction effects. The study identified a trade-off between deflection and residual stress, which was addressed through multi-objective optimization using a desirability function approach. Deflection was reduced from 1.44 mm (measured experimentally) to 0.6 mm under optimized conditions, while the minimum residual stress was 171 MPa, representing a decrease of approximately 12%. The optimum condition corresponded to a partially restrained clamping configuration, a plate thickness of 4 mm, a continuous single pass welding sequence, and natural air cooling. Predictive models based on ensemble regression techniques were constructed using the 72 DOE-based FEM cases and validated with experimental measurements to estimate responses and rank influential parameters. The models achieved an R² values of 0.93 for deflection and an R² value of 0.94 for residual stress. Consistency between statistical and predictive analyses confirmed the dominant factors. The optimization framework offers a data-driven approach to improve welded structural integrity and highlights the potential of integrated simulation and data analysis in materials processing and design.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100351"},"PeriodicalIF":4.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of varying stiffness on the interfacial failure behavior of isotactic polypropylene and porous alumina studied via DPD simulation 通过DPD模拟研究了不同刚度对等规聚丙烯与多孔氧化铝界面破坏行为的影响

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-08-21 DOI: 10.1016/j.jajp.2025.100343

Yoshitake Suganuma, James A. Elliott

引用次数: 0

Microstructure and mechanical properties of hand-held laser beam welded S700MC high-strength steel 手持式激光束焊接S700MC高强度钢的组织与力学性能

IF 4

Journal of Advanced Joining Processes Pub Date : 2025-12-01 Epub Date: 2025-11-10 DOI: 10.1016/j.jajp.2025.100359

Johannes Günther , Robert Prowaznik , Daniel Krug , Simon Jahn , Thomas Niendorf , Thomas Wegener

{"title":"Microstructure and mechanical properties of hand-held laser beam welded S700MC high-strength steel","authors":"Johannes Günther , Robert Prowaznik , Daniel Krug , Simon Jahn , Thomas Niendorf , Thomas Wegener","doi":"10.1016/j.jajp.2025.100359","DOIUrl":"10.1016/j.jajp.2025.100359","url":null,"abstract":"<div><div>Hand-held laser beam welding (HLBW) has gained attention due to its flexibility, high welding speeds, and excellent joint appearance. Since research on this technique remains limited, the present study provides first insights into HLBW of S700MC high-strength low-alloy steel. Radiographic analysis reveals that joints with a low degree of porosity can be achieved, addressing a major challenge of manual welding. Mechanical characterization by hardness, V-notch impact, and tensile testing demonstrates good performance of the welded structure. The welded joint exhibits a yield strength of 686 MPa and a tensile strength of 778 MPa compared to 775 MPa and 840 MPa of the base material, respectively. Hardness measurements show a reduction from 280 HV0.5 in the base material to ≤ 240 HV0.5 in the fine-grained heat-affected zone, consistent with the observed strength decrease and within the limits of the ER100S-G filler wire. Despite a reduction in fracture elongation from 20 % to ≈ 10 %, the absorbed impact energy reaches 36.5 J, exceeding the value of 30 J being characteristic for the base material, indicating sufficient ductility. Microstructural analysis reveals distinct cementite-free upper and granular bainite, acicular and polygonal ferrite as well as various morphologies of martensite-austenite constituents in the fusion zone and at given distances to the fusion line. A cooling time t<sub>8/</sub><sub>5</sub> ≈ 6 s was determined, to eventually enable quantitative process–microstructure–property correlation. Overall, the study confirms that HLBW enables the production of mechanically sound welds in S700MC, eventually allowing for robust application of this emerging technology for joining of high-strength thermo-mechanical processed mildsteel.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"12 ","pages":"Article 100359"},"PeriodicalIF":4.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145568213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0