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International Conference on Advanced Material and Manufacturing Science (ICAMMS 2012)

作者： Hu, Xinbin Mei, Zhangqiang Li, Liqun Zhou, Xiaoping Dong, Shijie Hubei Univ Technol Wuhan 430068 Peoples R China State Key Lab Adv Welding & Joining Harbin 150001 Peoples R China

ISBN: (纸本)9783037859933

The interface microstructure in the joints of magnesium alloy AZ31 to Ti alloy by the laser welding-brazing (LWB) process have been investigated in this paper. The results indicated that the interface between the solder reaction and TC4 formed net and holes, there was a 1 similar to 2 mu m intermetallic compound layer. Al-Mg-Zn compounds generated and distributed in the solder reaction zone.

关键词： Laser Welding-Brazing interface microstructure AZ31B/TC4 Dissimilar joints

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interface microstructure in Laser Welding-Brazing of AZ31B/TC4 Dissimilar Alloys

Interface Microstructure in Laser Welding-Brazing of AZ31B/T...

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3rd International Conference on Chemical, Metallurgical Engineering (ICCMME 2013)

作者： Hu, Xinbin Li, Liqun Zhou, Xiaoping Dong, Shijie Hubei Univ Technol Wuhan Peoples R China Harbin Inst Technol State Key Lab Adv Welding & Joining Harbin Peoples R China Hubei Prov Key Lab Green Mat Light Ind Wuhan Peoples R China

ISBN: (纸本)9783037859940

关键词： Laser Welding-Brazing interface microstructure AZ31B/TC4 Dissimilar joints

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Impact of interface microstructure on adhesion force between silver paste and silicon solar cells' emitter

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CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY 2014年第3期16卷 655-659页

作者： Yang, Hong Chen, Chuanke Wang, He Cao, Dingyue Lei, Xiandao Xi An Jiao Tong Univ Inst Solar Energy MOE Key Lab Nonequilibrium Synth & Modulat Conden Xian 710049 Peoples R China

The adhesion strength between silver paste and silicon solar cell's emitter is a primary source of long-term degradation in solar modules. In this study, the interface microstructure between screen-printed silver thick-film and silicon solar cells' emitter was studied. Three kinds of commercial silver pastes were printed on silicon solar cells' emitter to form different Ag-Si contact structures. The interface microstructure between silver paste and emitter was observed by SEM, while the compositions of Ag thick-film were analyzed by EDX. The deductions we got from SEM and EDX were verified by the pull test for the first time. The results presented in this study give some suggestions to the development of silver paste and crystalline silicon solar cells' fire-through.

关键词： Solar cells Adhesion strength Silver paste interface microstructure

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interface microstructure in Laser Welding-Brazing of AZ31B/TC4 Dissimilar Alloys

Interface Microstructure in Laser Welding-Brazing of AZ31B/T...

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The 2012 International Conference on Advanced Material and Manufacturing Science (ICAMMS 2012)

作者： Xinbin Hu Zhangqiang Mei Liqun Li Xiaoping Zhou Shijie Dong Hubei University of Technology State Key Laboratory of Advanced Welding and Joining

The interface microstracture in the joints of magnesium alloy AZ31 to Ti alloy by the laser welding-brazing(LWB) process have been investigated in this *** results indicated that the interface between the solder reaction and TC4 formed net and holes,there was a 1～2 urn intermetallic compound ***-Mg-Zn compounds generated and distributed in the solder reaction zone.

关键词： Laser Welding-Brazing interface microstructure AZ31B/TC4 Dissimilar joints

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Effect of tempering temperature on the microstructure and mechanical properties of Ti-6Al-4V/EH690 clad plates with stainless steel interlayer by vacuum hot rolling

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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES microstructure AND PROCESSING 2025年 931卷

作者： Wang, F. R. Guo, S. Wang, Y. K. Xie, G. M. Northeastern Univ State Key Lab Rolling & Automat Shenyang 110819 Peoples R China

Titanium (Ti)/steel clad plates have demonstrated significant potential for advancing marine engineering applications by leveraging the advantages of both materials. This study investigated the impact of tempering temperature on the microstructure and mechanical properties of Ti-6Al-4V/EH690 clad plates with stainless steel (SS) interlayer produced by vacuum hot rolling, elucidating the microstructural evolution and formation mechanisms at the interface. The results revealed that the addition of the SS interlayer leads to the formation of two distinct layers of intermetallic compounds (IMCs) observed through scanning transmission electron microscopy (STEM): layer 1, located near the SS interlayer, comprised of TiC, Fe2Ti, and sigma phase, while layer 2, adjacent to the Ti-6Al-4V side, was composed of FeTi. The incorporation of the SS interlayer reduced the microhardness differential across the interface, thereby enhancing the shear strength. After tempering at 560 degrees C, the clad plate exhibited the highest shear of 256 MPa. Shear fractures at different tempering temperatures occurred at the Ti-6Al-4V/SS interlayer interface, exhibiting a ductile-brittle mixed fracture mode. As the tempering temperature increased, the decarburization of EH690 steel intensified, resulting in an increase in brittle TiC within the interface IMCs layer and a corresponding decline in shear strength. The clad plates displayed delamination fracture characteristics during tensile testing. As the tempering temperature increased, the recrystallization softening of the base and cladding materials delayed interface delamination, resulting in a peak elongation (EL) of 20.5 % after tempering at 660 degrees C. By controlling the tempering temperature, the distribution of interfacial products in Ti-6Al-4V/EH690 clad plates with an SS interlayer could be precisely tailored, strengthening interfacial bonding and improving the synergistic deformation capability of the base and clad materials.

关键词： Ti-6Al-4V/EH690 clad plates Heat treatment SS interlayer interface microstructure Mechanical properties

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microstructure and mechanical properties of Ti/Al3Ti metal-intermetallic laminate (MIL) composites with different ductile phase volume fractions prepared by hot-pressing

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MATERIALS CHARACTERIZATION 2025年 219卷

作者： Tian, Liya Zong, Xiangyu Zhao, Jiucheng Guan, Shanyue Li, Cong Zhao, Zerui Zhang, Shizhong Jilin Univ Sch Mech & Aerosp Engn Natl Key Lab Automot Chassis Integrat & Bion Changchun 130025 Peoples R China Minist Educ Key Lab CNC Equipment Reliabil Changchun 130025 Peoples R China Jilin Univ Chongqing Res Inst Chongqing 401120 Peoples R China

In this research, Ti/Al3Ti/Al Metal-Intermetallic Laminate (MIL) composites featuring various residual aluminium volume fractions (RAVFs) were manufactured using the vacuum hot-pressing technique. The microstructure, elemental diffusion behavior, and grain characteristics of the Ti/Al interface were systematically investigated. The effect of the RAVF on both the macroscopic and microscopic mechanical properties of the Ti/ Al3Ti/Al MIL composites was systematically examined through indentation and static tensile testing. The thickness and average grain size of the Al3Ti layer increase with a rise in hot-pressing temperature, while the RAVF diminishes significantly. Notably, the nucleation density of Al3Ti was found to be higher at Ti/Al3Ti interfaces compared to Al/Al3Ti interfaces. Furthermore, in the high RAVF (44 %-25 %) specimens, the tensile strength was significantly enhanced with the increasing thickness of the Al3Ti layer. Conversely, in specimens with low RAVF (16 %-4 %), the interaction between the increasing thickness of the Al3Ti layer, the generation of microvoids and cracks, and the weakened coordination of deformation at the interfaces ultimately leads to a reduction of tensile strength. The specimen with the RAVF of 38 % showed superior strength and satisfactory elongation with a strength of 601 MPa and an elongation of 4.6 %. This study reveals the relationship between the volume fraction of ductile phases, interfacial microstructural features, and macroscopic mechanical properties of laminated composites, providing ideas for optimizing their mechanical properties.

关键词： Metal-intermetallic laminate composites Layered structures interface microstructure Micro/nano Mechanical properties

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Impact Welding of Aluminum AA1060 and Copper T2 Sheets by Vaporizing Foil Actuator: microstructure, Mechanical Properties, and Electrical Conductivity

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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 2024年 1-11页

作者： Yao, Yujie Deng, Jianghua Ning, Hanwei Lv, Yichao Fan, Zhisong Fuzhou Univ Fuzhou Fujian Peoples R China

In this work, the vaporizing foil actuator welding (VFAW) has been used for impact welding of aluminum AA1060 to copper T2 sheets. The microstructural feature, mechanical properties, and electrical conductivity of Al-Cu welded joints were investigated. The VFAW process was simulated by LS-DYNA to analyze the effect of impact velocity and angle. The evolution of the microstructure of the welding interface was revealed by smoothed particle hydrodynamics numerical simulation. The qualities of Al-Cu joints were evaluated by microstructure observations, lap shear tensile testing and resistance measurements. The results show that the Al-Cu joints have a flat welding interface at the discharge voltage of 8 kV, but the joints failed at the interface due to the residual Al2O3. Owing to the change in interfacial effective plastic strain and impact pressure, increasing the discharge voltage resulted in the transition of the interface waveform from flat to wavy, and the site of tensile failure changed from the welding interface to the Al base metal. The results of element analysis showed that there was a transition zone consisting of Al-Cu intermetallic compounds at the interface. This transition zone would change from intermittent to continuous and become thicker after increasing the discharge voltage. Variations in discharge voltage can change the resistivity, thickness, and area of the welding region, which in turn affects the joint resistance.

关键词： Al-Cu joint electrical conductivity interface microstructure mechanical property vaporizing foil actuator welding

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Multi-scale simulation and microstructure characteristics of TC4 ELI/Al 6013 plates by explosive welding

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JOURNAL OF MANUFACTURING PROCESSES 2024年 124卷 1180-1192页

作者： Zhou, Jianan Luo, Ning Liang, Hanliang Sun, Weifu China Univ Min & Technol Sch Mech & Civil Engn State Key Lab Geomech & Deep Underground Engn Xuzhou 221116 Peoples R China

The utilization of Ti/Al alloy composites is widespread in industrial applications owing their exceptional performance characteristics. In this study, the successful preparation of TC4 ELI/Al 6013 bimetallic composites was achieved using explosive welding technology. Electron Probe X-ray Micro Analyzer (EPMA) and Electron Backscatter Diffraction (EBSD) tests were conducted to reveal the microstructure characteristics and elemental diffusion of the bonding interface. Based on multi-scale simulation, the evolution characteristics of the bonding interface were studied. The results of the study indicated that the bonding interface exhibited a typical wavy structure without observable defects, with the average width of the diffusion layer measuring approximately 2.53 mu m. During the high strain rate impact process, the grains at the bonding interface underwent a certain degree of grain refinement. TC4 ELI primarily displayed a deformed structure, while Al 6013 exhibited predominantly a recrystallized structure. The morphology and structure of the bonding interface obtained from Smoothed Particle Hydrodynamics (SPH) simulation were consistent with experimental results. Additionally, the thickness of the diffusion layer, deduced from Molecular Dynamics (MD) simulation results, fell within the range of 1.9123-2.7044 mu m, corresponding to the results of characterization tests.

关键词： Explosive welding TC4 ELI/Al 6013 composite Multiscale simulation interface microstructure

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Molecular design of epoxy resin and the driving forces in adhesion with cementitious materials

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APPLIED SURFACE SCIENCE 2025年 689卷

作者： Xie, Zonglin Tian, Yi Xu, Yanqun Zhong, Fuwen Li, Suning Zhu, Xiaohong Yuan, Qiang Cent South Univ Sch Civil Engn Changsha Peoples R China Natl Engn Res Ctr High Speed Railway Construct Tec Changsha Peoples R China Univ Calif Berkeley Dept Civil & Environm Engn Berkeley CA USA

Epoxy resin grouted or coated in cementitious materials serves as an effective method for structural reinforcement and maintenance. However, interface debonding is the primary mode of repair failure, highlighting the need for a deeper exploration of the intrinsic adhesion mechanisms. This study analyzes the bond properties between epoxy resins and cementitious materials by semi-quantifying the mechanical interlocking (micro-interface thickness) and chemical interaction (hydrogen bonds). Surface free energies and thermodynamic parameters during the adhesion process were investigated via inverse gas chromatography (IGC) and isothermal titration calorimetry (ITC) tests. Results show that the lower viscosity and higher polarity of epoxy resins lead to enhanced bond strength. The entropy change, induced by OH-pi hydrophobic interactions, emerged as the primary driving force during the adhesion process, while the enthalpy change, induced by hydrogen bonds, also plays a favorable role. Moreover, the contribution of hydrates to adhesion effectiveness was determined to be C-S-H > AFt > Ca(OH)(2) > CaCO3.

关键词： Epoxy resin Cementitious materials Adhesion interface microstructure Thermodynamic process

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Research on interfacial bonding mechanism and mechanical properties of TA1/45 carbon steel composite tubes by hot power spinning

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JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 2025年 35卷 5894-5907页

作者： Zhang, Peng Wang, Wei Wang, Tao Wu, Tianfeng Ren, Zhongkai Han, Jianchao Zhao, Chenhao Taiyuan Univ Technol Coll Mat Sci & Engn Taiyuan 030024 Peoples R China Taiyuan Univ Technol Coll Mech Engn Taiyuan 030024 Peoples R China Taiyuan Univ Technol Natl Key Lab Met Forming Technol & Heavy Equipment Taiyuan 030024 Peoples R China Taiyuan Univ Technol Engn Res Ctr Adv Met Composites Forming Technol & Minist Educ Taiyuan 030024 Peoples R China Xinjiang Intelligent Equipment Res Inst Aksu Aksu 843199 Peoples R China

Titanium/steel composite tubes combine the low cost, and high mechanical strength of the steel and the excellent corrosion resistance of the titanium, showing remarkable application potential in fields such as shipbuilding and petrochemical industries. However, significant differences exist in the mechanical and thermophysical properties between titanium and steel, including strength, elongation and thermal expansion coefficient. The conditions for metallurgical bonding between the two materials are relatively strict. Therefore, in this study, TA1/45 steel composite tubes were fabricated using the hot power spinning technique combined with ends welding to coordinate the deformation between the inner and outer tubes and to prevent surface oxidation. Combined with experiment and numerical simulation, the material flow pattern and stress state in typical regions during spinning was investigated, and the microstructure and phase composition of the interface were characterized. The mechanical properties of the composite tube was tested, to explain the diffusion and reaction mechanisms of interface elements, and reveal the generation mechanism and distribution characteristics of phases. Results show that the interface was tightly bonded without obvious defects, and primarily composed of an Fe2Ti, FeTi, and TiC. The shear and tensile strength of the composite tube were 156.3 MPa and 496.2 MPa, respectively. In addition, the elongation was close to 33.7%, indicating high bonding strength and excellent mechanical properties of the composite tube. This study serves as an important theoretical basis for developing a hot power spinning process for titanium/steel composite tubes with excellent comprehensive performance.

关键词： Titanium/steel composite tube Hot power spinning Interfacial bonding behavior interface microstructure Forming mechanism

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