Baohua Chang
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View article: Study on the Layered Structure of Ceramic-Side Bonding Area and the Mechanical Property of Al2O3–Kovar Brazed Joint with Ag-Cu-Ti Filler
Study on the Layered Structure of Ceramic-Side Bonding Area and the Mechanical Property of Al2O3–Kovar Brazed Joint with Ag-Cu-Ti Filler Open
During active brazing of alumina ceramics, active elements react with the ceramic to form a reaction layer, which has significant influence on the mechanical property of the brazed joint. However, the composition and formation mechanism of…
View article: Environmental Evaluation and Curing Treatment Technology for Petroleum Drilling Waste
Environmental Evaluation and Curing Treatment Technology for Petroleum Drilling Waste Open
Drilling is an important means to realize oil and gas exploration and development, but a large amount of waste is generated in the drilling process, and with the release of new environmental regulations and standards, the environmental haz…
View article: Metal Oxide-Doped Pd-Based Catalysts for Enhanced Formaldehyde Oxidation
Metal Oxide-Doped Pd-Based Catalysts for Enhanced Formaldehyde Oxidation Open
In this study, a novel strategy to enhance the performance of palladium (Pd)-based catalysts by doping with metal oxides (Mn3O4, MoO3, and SnO) has been developed in order to overcome the limitations of its low activity and high cost in th…
View article: Magnetic Field Modeling in High-Current Multiwire Submerged Arc Welding of Steel Pipes
Magnetic Field Modeling in High-Current Multiwire Submerged Arc Welding of Steel Pipes Open
Multiwire submerged arc welding (MSAW) is an efficient joining technology widely used in manufacturing large-diameter oil and gas steel pipes. During spiral pipe MSAW, the long cantilever welding torch (LCWT) for inner welding is prone to …
View article: Application of UAV remote sensing for vegetation identification: a review and meta-analysis
Application of UAV remote sensing for vegetation identification: a review and meta-analysis Open
Green vegetation is an essential part of natural resources and is vital to the ecosystem. Simultaneously, with improving people’s living standards, food security and the supply of forage resources have become increasingly the focus of atte…
View article: Preliminary Monitoring and Observation of Fuel Cell Temperature Characteristics by Using NiCr-NiSi Thin-Film Thermocouple
Preliminary Monitoring and Observation of Fuel Cell Temperature Characteristics by Using NiCr-NiSi Thin-Film Thermocouple Open
This study presents the calibration methodology of NiCr-NiSi thin-film thermocouples and evaluates their application in real-time temperature monitoring and characterization of fuel cell thermal behavior. Experimental results reveal that t…
View article: Influence of substrate thickness on the microstructure and mechanical properties of Al–Si–Cu/Al–Cu hybrid structures additively manufactured by electron beam directed energy deposition
Influence of substrate thickness on the microstructure and mechanical properties of Al–Si–Cu/Al–Cu hybrid structures additively manufactured by electron beam directed energy deposition Open
Electron beam directed energy deposition (EB-DED) has been successfully employed to additively manufacture and repair Al–Cu alloys, however, the effects of thermal histories on the microstructure and properties have been little investigate…
View article: Study on Mitigation of Interfacial Intermetallic Compounds by Applying Alternating Magnetic Field in Laser-Directed Energy Deposition of Ti6Al4V/AA2024 Dissimilar Materials
Study on Mitigation of Interfacial Intermetallic Compounds by Applying Alternating Magnetic Field in Laser-Directed Energy Deposition of Ti6Al4V/AA2024 Dissimilar Materials Open
Brittle intermetallic compounds (IMCs) at the interface of dissimilar materials can seriously affect the mechanical properties of the dissimilar components. Introducing external assisted fields in the fabrication of dissimilar components i…
View article: Effects of conventional interweaving and secondary deposition on the microstructure and properties of Ti6Al4V/AA2024 alloy component fabricated by laser-directed energy deposition
Effects of conventional interweaving and secondary deposition on the microstructure and properties of Ti6Al4V/AA2024 alloy component fabricated by laser-directed energy deposition Open
The connection of dissimilar materials has always been a great challenge, especially titanium alloy and aluminum alloy, which have broad application prospects in the aerospace industry. In this work, the Ti6Al4V/AA2024 alloy component was …
View article: Microstructure and properties of K648 superalloy additively manufactured by extreme high-speed laser metal deposition
Microstructure and properties of K648 superalloy additively manufactured by extreme high-speed laser metal deposition Open
In order to improve the manufacturing efficiency of high-chromium superalloys, an innovative extreme high- speed laser metal deposition (EHLMD) process was used. The growth behavior of precipitated phases, high-temperature mechanical prope…
View article: Accelerated improvement in tensile superelasticity of electron beam directed energy deposition manufactured NiTi alloys by artificial thermal cycling combined with low temperature aging treatment
Accelerated improvement in tensile superelasticity of electron beam directed energy deposition manufactured NiTi alloys by artificial thermal cycling combined with low temperature aging treatment Open
The low-temperature aging treatment at 250°C can significantly improve the tensile superelasticity of NiTi alloys fabricated by electron beam directed energy deposition (EB-DED). However, it requires a very long aging duration (up to 200 h…
View article: Generation and Suppression of Pendant Droplet Oscillation in Electron Beam Directed Energy Deposition
Generation and Suppression of Pendant Droplet Oscillation in Electron Beam Directed Energy Deposition Open
Electron beam–directed energy deposition (EB–DED) has emerged as a promising wire-based metal additive manufacturing technique. However, the effects of EBs on pendant droplets at wire tips have not yet been determined. The aim of this stud…
View article: Effect of hot isostatic pressing on microstructure and properties of high chromium K648 superalloy manufacturing by extreme high-speed laser metal deposition
Effect of hot isostatic pressing on microstructure and properties of high chromium K648 superalloy manufacturing by extreme high-speed laser metal deposition Open
High chromium superalloys have good overall mechanical properties and are widely used in critical hot-end components. The current manufacturing process still faces the problem of low forming efficiency. Extreme high-speed laser metal depos…
View article: Effect of solution cooling rates on microstructure and mechanical properties of K648 high chromium superalloy additive-manufactured by the extreme high-speed laser metal deposition
Effect of solution cooling rates on microstructure and mechanical properties of K648 high chromium superalloy additive-manufactured by the extreme high-speed laser metal deposition Open
High chromium superalloy K648, additive-manufactured by extreme high-speed laser metal deposition (EHLMD) process, was heat treated by solution and then cooled at different cooling rates achieved by different conditions in this study. The …
View article: Control of droplet transfer during in-situ synthesis of NiTi alloys by dual-wire electron beam additive manufacturing
Control of droplet transfer during in-situ synthesis of NiTi alloys by dual-wire electron beam additive manufacturing Open
In this paper, the droplet transfer mode during in-situ synthesis of NiTi alloys by dual-wire electron beam additive manufacturing by pure Ni and Ti wires was comprehensively studied. This work shows that the droplet transfer was jointly d…
View article: Microstructure and Wear Resistance of FeCuNiTiAl High-Entropy Alloy Coating on Ti6Al4V Substrate Fabricated by Laser Metal Deposition
Microstructure and Wear Resistance of FeCuNiTiAl High-Entropy Alloy Coating on Ti6Al4V Substrate Fabricated by Laser Metal Deposition Open
In order to improve the hardness and wear resistance of titanium alloys, an equimolar ratio high-entropy alloy (HEA) FeCuNiTiAl coating was fabricated on the surface of titanium alloy Ti6Al4V by means of laser metal deposition for the firs…
View article: Correction to: Analysis on grain growth of SS316L induced by plasma cutting process using probabilistic FEM with experimental verification
Correction to: Analysis on grain growth of SS316L induced by plasma cutting process using probabilistic FEM with experimental verification Open
View article: Humping Formation and Suppression in High-Speed Laser Welding
Humping Formation and Suppression in High-Speed Laser Welding Open
Increasing welding speed can promote the productivity of laser welding. However, humping defects often occur, which limits the application of this strategy. The existing explanations for the humping formation remain vague, and mitigation a…
View article: Effect of twin-wire feeding methods on the in-situ synthesis of electron beam fabricated Ti-Al-Nb intermetallics
Effect of twin-wire feeding methods on the in-situ synthesis of electron beam fabricated Ti-Al-Nb intermetallics Open
View article: Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys
Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys Open
View article: A vision based method for humping detection in high-speed laser welding
A vision based method for humping detection in high-speed laser welding Open
In this paper a vision based detection method for humping in high-speed laser welding is proposed. A high-speed imaging system is used to capture the images of melt pool in the near-infrared range and the unaffected melt pool region is ext…
View article: Multi-Output Monitoring of High-Speed Laser Welding State Based on Deep Learning
Multi-Output Monitoring of High-Speed Laser Welding State Based on Deep Learning Open
In order to ensure the production quality of high-speed laser welding, it is necessary to simultaneously monitor multiple state properties. Monitoring methods combining vision sensing and deep learning models are popular but most models us…
View article: Research on the Weld Position Detection for the T-Joints in Web-Core Sandwich Panels Based on Eddy Current Technology
Research on the Weld Position Detection for the T-Joints in Web-Core Sandwich Panels Based on Eddy Current Technology Open
Web-core sandwich panels have gained the popularity in various fields, especially aviation and shipbuilding, etc. Penetration welding was considered as an effective process to manufacture such a structure through a T-joint. To ensure the f…
View article: Influences of Cooling Conditions on the Liquation Cracking in Laser Metal Deposition of a Directionally Solidified Superalloy
Influences of Cooling Conditions on the Liquation Cracking in Laser Metal Deposition of a Directionally Solidified Superalloy Open
Directionally solidified (DS) nickel-based superalloys are widely used in manufacturing turbine blades, which may fail due to wear and/or material loss during service. Laser metal deposition (LMD) has been considered to be a promising tech…
View article: Closed-Loop Control of Droplet Transfer in Electron-Beam Freeform Fabrication
Closed-Loop Control of Droplet Transfer in Electron-Beam Freeform Fabrication Open
In the process of electron-beam freeform fabrication deposition, the surface of the deposit layer becomes rough because of the instability of the feeding wire and the changing of the thermal diffusion condition. This will make the droplet …
View article: A Study on the Influences of Welding Position on the Keyhole and Molten Pool Behavior in Laser Welding of a Titanium Alloy
A Study on the Influences of Welding Position on the Keyhole and Molten Pool Behavior in Laser Welding of a Titanium Alloy Open
Various welding positions need be used in laser welding of structures with complex configurations. Therefore, it is necessary to gain knowledge of how the welding positions can influence the keyhole and weld pool behavior in order to bette…
View article: Online Measurement of Deposit Surface in Electron Beam Freeform Fabrication
Online Measurement of Deposit Surface in Electron Beam Freeform Fabrication Open
In the process of electron beam freeform fabrication (EBF3), due to the continuous change of thermal conditions and variability in wire feeding in the deposition process, geometric deviations are generated in the deposition of each layer. …
View article: Modeling and simulation of two port proportional slip-in cartridge valve based on AMESim
Modeling and simulation of two port proportional slip-in cartridge valve based on AMESim Open
Two port proportional slip-in cartridge valves are critical components of the heavy duty press hydraulic system. Their performance, especially the static flow rate under different valve opening size and the valve response time, is importan…
View article: Research on the Weld Position Detection Method for Sandwich Structures from Face-Panel Side Based on Backscattered X-ray
Research on the Weld Position Detection Method for Sandwich Structures from Face-Panel Side Based on Backscattered X-ray Open
Web-core sandwich panels are a typical lightweight structure utilized in a variety of fields, such as naval, aviation, aerospace, etc. Welding is considered as an effective process to join the face panel to the core panel from the face pan…
View article: Model-driven online correction welding robot automatic programming system
Model-driven online correction welding robot automatic programming system Open
In the fields of aerospace and shipbuilding, there are a large number of small-batch, flexible components to manufacture by welding. The geometric models of these components and the actual components itself often have deviations, which mak…