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microstructure analysis and Mechanical Performance of TA10/6061 Large Size Explosive Welding Composite Pipes Based on Numerical Simulation Verification

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ADVANCED ENGINEERING MATERIALS 2025年第7期27卷

作者： Zhou, Haiwei Shao, Fei Xu, Qian Bai, Linyue Yuan, Jiaxin Liu, Hailong Army Engn Univ PLA Field Engn Coll 1 Haifu Lane Nanjing 210000 Jiangsu Peoples R China

The purpose of this study is to investigate and analyze the preparation and application reliability of large-size TA10/6061 explosive welding composite pipes. The results demonstrate that the AUTODYN numerical simulation of the composite pipe accurately reflects the actual explosive welding interface morphology, with both exhibiting waveform interfaces, indicating the favorable bonding morphology. The titanium elements at the composite pipe interface diffused into the aluminum side without forming intermetallic compounds. A substantial number of fine grains are generated in the titanium structure at the interface, enhancing the bonding strength. The microscopic analysis confirms the high bonding quality of the composite pipe. The composite pipe demonstrated high tensile and shear strength, which are 481.62 and 165.08 MPa, respectively, which are about 62.40% and 60.96% higher than that of single 6061 aluminum alloy, which exhibits high strength, significantly improved the ductility, and the ductile fracture failure modes. The titanium side, aluminum side, and interface demonstrated excellent bending resistance, with the highest hardness value observed at the interface and an increase in hardness on both the titanium side and interface in the direction of detonation.

关键词： explosive welding mechanical performance microstructure analysis numerical simulation TA10/6061 composite pipe

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microstructure analysis of TC4/Al 6063/Al 7075 Explosive Welded Composite Plate via Multi-scale Simulation and Experiment

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稀有金属材料与工程 2025年第1期54卷 27-38页

作者： Zhou Jianan Luo Ning Liang Hanliang Chen Jinhua Liu Zhibing Zhou Xiaohong National Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China China Coal Technology Engineering Group Huaibei Blasting Technology Research Institute Limited Company Huaibei 235000China

Because of the challenge of compounding lightweight,high-strength Ti/Al alloys due to their considerable disparity in properties,Al 6063 as intermediate layer was proposed to fabricate TC4/Al 6063/Al 7075 three-layer composite plate by explosive *** microscopic properties of each bonding interface were elucidated through field emission scanning electron microscope and electron backscattered diffraction(EBSD).A methodology combining finite element method-smoothed particle hydrodynamics(FEM-SPH)and molecular dynamics(MD)was proposed for the analysis of the forming and evolution characteristics of explosive welding interfaces at *** results demonstrate that the bonding interface morphologies of TC4/Al 6063 and Al 6063/Al 7075 exhibit a flat and wavy configuration,without discernible defects or *** phenomenon of grain refinement is observed in the vicinity of the two bonding ***,the degree of plastic deformation of TC4 and Al 7075 is more pronounced than that of Al 6063 in the intermediate *** interface morphology characteristics obtained by FEM-SPH simulation exhibit a high degree of similarity to the experimental *** simulations reveal that the diffusion of interfacial elements predominantly occurs during the unloading phase,and the simulated thickness of interfacial diffusion aligns well with experimental *** introduction of intermediate layer in the explosive welding process can effectively produce high-quality titanium/aluminum alloy composite ***,this approach offers a multi-scale simulation strategy for the study of explosive welding bonding interfaces.

关键词： TC4/Al 6063/Al 7075 composite plate explosive welding microstructure analysis multi-scale simulation

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microstructure analysis and hardness prediction based on microstructure evolution theory in multi-pass welded joint

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 2022年第13期236卷 7246-7258页

作者： Zhang, Qingya Zhuo, Zichao Zhou, Hong Wang, Jiangchao Huazhong Univ Sci & Technol Sch Naval Architecture & Ocean Engn Wuhan Peoples R China Jiangsu Univ Sci & Technol Sch Naval Architecture & Ocean Engn Zhenjiang Jiangsu Peoples R China

During multi-pass butt welding of high-strength steel (HSS) thick plate, it is difficult to estimate the hardness performance of thick weld since multithermal cycles can drive complex microstructure evolution. In this study, butt-welded joint of 75 mm-thick Q690 HSS was prepared by multi-pass shielded metal arc welding (SMAW) in advance;meanwhile, experiments were carried out to characterize microstructure and measure hardness distribution in butt-welded joint. Then, the welding temperature history of butt-welded joint was numerically examined. Based on the irreversibility of Martensite and Bainite, the microstructure evolution model was modified to predict the complicated microstructure evolution in multi-pass welded joint. Compared with experimental data, the validity of modified microstructure evolution model was verified. With the application of simulated thermal cycles and material chemical compositions as input parameters, volume fraction distribution of each phase was obtained by modified microstructure evolution model and hardness value was calculated by hardenability algorithm. Both experimental and predicted results exhibited that microstructure in weld metal (WM) is mainly composed of granular Bainite with a small amount of Ferrite and Martensite, and heat-affected zone (HAZ) consists of predominantly lath Martensite. Hardness distribution in butt-welded joint obtained by the prediction method is in accordance with the measurement. Average hardness value in WM and BM is 290 VPN and 250 VPN. A sharp decrease in HAZ hardness can be found from the fusion line to base metal (BM). The maximal value in the HAZ close to fusion line and the corresponding prediction deviation is 6%.

关键词： multi-pass welded joint microstructure analysis hardness prediction microstructure evolution approach

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microstructure analysis and Multi-Unit Cell Model of Three Dimensionally Four-Directional Braided Composites

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APPLIED COMPOSITE MATERIALS 2015年第1期22卷 29-50页

作者： Xu, Kun Qian, Xiaomei Univ Elect Sci & Technol China Sch Aeronaut & Astronaut Chengdu 611731 Peoples R China

In this paper, a new multi-unit cell model of three dimensionally braided composites is presented on the basis of the microstructure analysis of 3D braided preforms produced by four-step 1 x 1 method. According to a new unit cell partition scheme, the multi-unit cell model possesses five kinds of unit cells, namely interior, exterior surface, interior surface, exterior corner and interior corner unit cells. Each type of the representative volume cell has unique microstructure and volume fraction in braided composites. On the basis of these five unit cell models, the structural geometry parameters of the preforms are analyzed and the relationship between the structural parameters and the braiding parameters in different regions are derived in detail, such as the braiding angles, fiber volume fraction, yarn packing factor, braiding pitch and so on. Finally, by using the multi-unit cell model, the main structural parameters of braided composites specimens are calculated to validate the effectiveness of the model. The results are in good agreement with the available experimental data. In addition, the effect of braiding angle on the squeezing condition of braiding yarn is analyzed. The variations of the volume proportion of five unit cells to the whole specimen with rows and columns are discussed, respectively. The presented multi-unit cell model can be adopted to design 3D braided composites and predict their mechanical properties.

关键词： Textile composites Braided composites microstructure analysis Geometrical model

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microstructure analysis of electrokinetically stabilized peat

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MEASUREMENT 2014年第1期48卷 187-194页

作者： Moayedi, Hossein Nazir, Ramli Kazemian, Sina Huat, Bujang Kim Univ Teknol Malaysia Fac Civil Engn Dept Geotech & Transportat Johor Baharu Malaysia Payame Noor Univ Dept Civil Engn Tehran Iran Univ Putra Malaysia Fac Engn Dept Civil Engn Serdang 43400 Selangor Malaysia

In this research, four new chemical grout reagents were used, namely, sodium silicate, calcium chloride, calcium oxide, and aluminium hydroxide. The injection of the chemicals through the soil by using an electrokinetic method was successfully performed. Increase in the shear strength of stabilized soil was higher in the locations near the cathode and the calcium oxide showed the highest increment. The soil microstructure is comprehensively changed due to the change in the pH of the soil, and fluid flow during the electrokinetic application depends upon time and location of samples taken along the cell. The EDX output of natural peat showed the presence of oxygen (46.2%), carbon (29.3%), silica (5.1%), alumina (2.5%), and calcium (3.0%). However, after electrokinetic injection of the sodium silicate, calcium oxide, calcium chloride, and aluminium hydroxide, the concentration of these elements in the soil samples taken adjacent to the anode changed, with the carbon changing to 24.9%, 16.5%, 31.4%, 34%;the oxygen to 47.6%, 41.9%, 53%, 46%;the silica to 12.3%, 4.1%, 4.2%, 4.7%;the alumina to 2.5%, 1.2%, 2.2%, 6.2%;and the calcium to 1.8%, 18.6%, 6.1%, 2.6%, respectively. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： Electrokinetic stabilization microstructure analysis Soil improvement Tropical peat

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microstructure analysis of tungsten nanopowders by Williamson-Hall method using diffractometer with high-speed detector

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INORGANIC MATERIALS 2014年第15期50卷 1455-1458页

作者： Sirotinkin, V. P. Mikhailova, A. B. Shamray, V. F. Samokhin, A. V. Sinaiskii, M. A. Tikhomirov, S. A. Tarasov, O. D. Russian Acad Sci Baikov Inst Met & Mat Sci Moscow Russia

Microstructural characteristics of tungsten nanopowders were determined by the Williams-Hall method from the experimental data obtained using an Ultima IV diffractometer with high-speed detector. The effect of the change in the slit size limiting the divergence of the incident beam on the tungsten diffraction peak profiles was investigated. It was shown that insignificant changes in the profile characteristics affect only slightly the results of microstructural analysis.

关键词： diffractometer with high-speed detector tungsten powders microstructure analysis Williamson-Hall method diffraction peak profile

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microstructure analysis of Quenched Semi-Solid A356 Aluminum Alloy Slurry by Using Weck's Reagent

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MATERIALS TRANSACTIONS 2020年第6期61卷 1077-1083页

作者： Lei, Simin Gao, Li Harada, Yohei Kumai, Shinji Tokyo Inst Technol Dept Mat Sci & Engn Tokyo 1528552 Japan Tokyo Inst Technol Tokyo Japan Nissan Motor Co Ltd Yokosuka Kanagawa 2378523 Japan

The semi-solid slurry of A356 alloy of various solid fractions was fabricated and water quenched to freeze the morphology of the Al grains in the semi-solid state. Two kinds of specimens with different volume (large and small) were prepared to change the cooling rate during the quenching. The difference in the amount of solid growth around the original spherical Al grains during the quenching was investigated by the color etching method with Weck's reagent, which is sensitive to the solute segregation. It was found that the amount of solid growth during the quenching increased with a decreasing cooling rate. The amount of solid growth of each spherical Al grain also increased for a decreasing local solid fraction, or the amount of residual liquid and the mutual distance between the solid grains. The solid fraction obtained by the color etching method showed a good agreement with the estimated solid fraction from the phase diagram. It was confirmed that the present color metallography was effective to evaluate the correct solid fraction at the semi-solid state.

关键词： semi-solid processing A356 aluminum alloy solute segregation cooling rates Weck's reagent microstructure analysis

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microstructure analysis and Evaluation of Mechanical Properties of Nickel Based Super Alloy CCA617

Microstructure Analysis and Evaluation of Mechanical Propert...

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4th International Conference on Materials Processing and Characterzation (ICMPC)

作者： Ahmeda, G. M. Sayeed Mohiuddin, Mohd Viquar Sultana, Salma Dora, H. Krishnamurthy Singh, V. Dharam MJ Coll Engn & Technol Dept Mech Engn Hyderabad Andhra Pradesh India

Super alloy CCA 617 is currently a candidate material for Super Critical power plants envisaged to operate up to 973 K. It is a relatively new alloy for this application, and requires evaluation of microstructure and mechanical properties at peak operating temperatures as well as at low temperatures experienced during power transients. It is proposed to study the various phases and their effects on mechanical properties at various temperatures. In the present study the initial microstructure of CCA 617 in its forged state was studied with the application of different etchants, optical microscopy, SEM and EDAX analysis, and hardness test was carried out and results were plotted. Literature survey was carried out on the microstructure and hardness in Super alloys. (C) 2015 (C) 2015 Published by Elsevier Ltd.

关键词： microstructure analysis Mechanical Properties Characterization Super alloys Grain Size analysis

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microstructure analysis of FeS Layer as Solid Lubrication Composite Coating Produced by Low-temperature Ion Sulfurization

Microstructure Analysis of FeS Layer as Solid Lubrication Co...

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International Conference on Advanced Engineering Materials and Technology (AEMT2011)

作者： Qiao, Yulin Zang, Yan Yang, Shanlin Hu, Chunhua Armored Force Engn Inst State Key Lab Remfg Beijing 100072 Peoples R China

ISBN: (纸本)9783037851937

The ferrous sulfide (FeS) solid lubrication composite layer was prepared on the surface of CrMoCu alloy cast iron that treated by ion Nitrocarburizing, with low-temperature ion sulfurizing technique. By morphology and composition analysis, it is shown that the FeS layer has a micro-nano-hole structure, formed by nanometer sulfide particles, and the composite layer surface is mainly FeS. Also, there are a cross area and a diffusion area between the ion sulfide layer and the ion nitrocarburizing layer.

关键词： FeS layer solid lubrication coating microstructure analysis

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microstructure analysis of AC Corona Aging of Silicone Rubber

Microstructure Analysis of AC Corona Aging of Silicone Rubbe...

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9th International Conference on Properties and Applications of Dielectric Materials

作者： Xie, Congzhen Zhang, Yao Wang, Jianguo Liu, Yang Hao, Yanpeng Gao, Mingzhen South China Univ Technol Sch Elect Power Guangzhou 510640 Guangdong Peoples R China Wuhan Univ Sch Elect Engn Wuhan 430072 Peoples R China Dongguan Power Supply Bur Guangdong 523000 Peoples R China

ISBN: (纸本)9781424443666

A needle-plane electrode system was used to study the characteristics of the silicone rubber under AC corona. microstructure and chemical structure change analysis on the surface of silicone rubber after corona ageing was made by using SEM, AFM and FTIR. Infrared spectrum shows that corona would cause the rupture of fundamental chain and branched chain of material. Along with the increase of corona aging time, the content of fundamental chain and branched chain will decrease. The continuous increase in the content of carbanyl group shows the intensifying oxidation. Hydroxyl -OH turns into combined condition from dissociative condition.

关键词： AC corona high-temperature vulcanized silicone rubber(HTV-SR) microstructure analysis SEM AFM FTIR

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