The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Wenjiang Ding - One of the best experts on this subject based on the ideXlab platform.
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an investigation into interface formation and mechanical properties of aluminum copper Bimetal by squeeze casting
Materials & Design, 2016Co-Authors: Qudong Wang, Qigui Wang, Wenjiang DingAbstract:Abstract Aluminum–copper Bimetal was prepared by compound casting liquid aluminum onto copper bars and solidifying under applied pressure. The effect of pouring temperature and applied pressure on microstructure and mechanical and electrical properties of the Bimetal was investigated. Bonding mechanism and mechanical and electrical behaviors of Bimetal were analyzed. Sound metallurgical bonding could be achieved by applying thermal spray zinc coating onto Cu inserts and carefully controlling the squeeze casting process. The results showed that interfacial reactions between liquid Al and solid Cu lead to the formation of transition zone, four possible layers, Al4Cu9 layer, Al2Cu layer, Al–Cu eutectic layer and Cu rich Al solid solution layer were identified in the transition zone. The thickness of each layer varies with the variation of pouring temperature and applied pressure. The formation of inherent defects and thickening of intermetallic compound promotes cracks propagation and weakens the bonding strength, hinders current flowing through and weakens the electrical property. The Bimetal made at pouring temperature of 700 °C gives the best mechanical and electrical properties.
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an investigation into aluminum aluminum Bimetal fabrication by squeeze casting
Materials & Design, 2015Co-Authors: Qudong Wang, Qigui Wang, Wenjiang DingAbstract:Abstract Aluminum–aluminum Bimetal were prepared by casting liquid A356 aluminum alloy onto 6101 aluminum extrusion bars and solidifying under applied pressure. The effect of surface treatment, pouring temperature and applied pressure on microstructure and mechanical properties of the Bimetal was investigated. The results showed that sound metallic bonding could be produced by electro-plating the solid 6101 aluminum alloy with a layer of zinc coating and carefully controlling the casting temperature. With the application of pressure during solidification process, the tensile strength exhibited more promising results than that made by gravity casting, for both A356 aluminum alloy matrix and Bimetal. However, with the increase of applied pressure, A356 aluminum alloy matrix and Bimetal showed different behaviors. For A356 aluminum alloy matrix, the tensile strength increased with the increase of applied pressure, for Bimetal it appeared to be independent on the magnitude of the applied pressure and the value remained steady. The fracture analysis indicated that during the tensile test of Bimetal, the crack initiation began with initial fracture of eutectic Si in the transition zone then extended in the transition zone. The tensile strength of the Bimetal fabricated by squeeze casting method was improved by about 10%, from 145 MPa to 155 MPa, as compared with that made by gravity casting. The process presented in this study provides a promising and effective approach to create a metallic bonding between an aluminum insert and various aluminum melts to develop advanced functional and structural materials.
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An investigation into aluminum–aluminum Bimetal fabrication by squeeze casting
Materials & Design, 2015Co-Authors: Qudong Wang, Qigui Wang, Wenjiang DingAbstract:Abstract Aluminum–aluminum Bimetal were prepared by casting liquid A356 aluminum alloy onto 6101 aluminum extrusion bars and solidifying under applied pressure. The effect of surface treatment, pouring temperature and applied pressure on microstructure and mechanical properties of the Bimetal was investigated. The results showed that sound metallic bonding could be produced by electro-plating the solid 6101 aluminum alloy with a layer of zinc coating and carefully controlling the casting temperature. With the application of pressure during solidification process, the tensile strength exhibited more promising results than that made by gravity casting, for both A356 aluminum alloy matrix and Bimetal. However, with the increase of applied pressure, A356 aluminum alloy matrix and Bimetal showed different behaviors. For A356 aluminum alloy matrix, the tensile strength increased with the increase of applied pressure, for Bimetal it appeared to be independent on the magnitude of the applied pressure and the value remained steady. The fracture analysis indicated that during the tensile test of Bimetal, the crack initiation began with initial fracture of eutectic Si in the transition zone then extended in the transition zone. The tensile strength of the Bimetal fabricated by squeeze casting method was improved by about 10%, from 145 MPa to 155 MPa, as compared with that made by gravity casting. The process presented in this study provides a promising and effective approach to create a metallic bonding between an aluminum insert and various aluminum melts to develop advanced functional and structural materials.
Miroslav Sahul - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Annealing on the Properties of AW5754 Aluminum Alloy-AZ31B Magnesium Alloy Explosively Welded Bimetals
Journal of Materials Engineering and Performance, 2019Co-Authors: Miroslav Sahul, Ľubomír Čaplovič, Petr Nesvadba, Jan Lokaj, Barbara OdokienováAbstract:Explosive welding of AW5754 aluminum alloy to AZ31B magnesium alloy was performed. AW5754 was proposed as a flyer plate. A parallel setup was used during explosive welding. The annealing of AW5754/AZ31B composite plate at 250, 300 and 350 °C for 2, 3, 4 and 5 h was performed after explosive welding. Bimetals were characterized by regular wavy interface. Annealing resulted in the creation of intermetallic compounds (IMCs). The increase in the thickness of IMC interfacial layer was observed with increasing of annealing temperature and time. IMC layer of highest thickness was recorded after annealing at 350 °C for 5 h and averaged 67 µm. EDS analysis showed that the interfacial layer close to AW5754 alloy was formed by Al_3Mg_2 IMC, and interfacial layer adjacent to the AZ31B alloy consisted of Mg_17Al_12 IMC. Bright particles were spread at the AW5754-Al_3Mg_2 IMC interface. Rise in the microhardness at the interface of produced Bimetal was associated with work hardening. Microhardness values increased to 218 HV0.025 after annealing process due to IMCs present at the interface. Decrease in microhardness in locations close to the IMC interfacial layer was found after heat treatment due to recrystallization. The Bimetal tensile strength reached 120 MPa. The annealing resulted in decrease in the Bimetal tensile strength.
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Influence of Annealing on the Properties of Explosively Welded Titanium Grade 1—AW7075 Aluminum Alloy Bimetals
Journal of Materials Engineering and Performance, 2018Co-Authors: Miroslav Sahul, L’ubomír Čaplovič, Jan Lokaj, Petr NesvadbaAbstract:Explosive welding of titanium Grade 1 to AW7075 aluminum alloy arranged in parallel setup was performed. The annealing of produced Bimetals at the temperatures of 450, 500 and 550 °C for times ranging from 20 to 100 h was carried out after explosive welding. The produced Bimetal was characteristic by its wavy interface typical for that bonding process. Increase in the microhardness at the interface was recorded due to work hardening. Delamination of titanium Grade 1 flyer sheet was firstly observed when annealing temperature of 500 °C for 40 h was carried out. Annealing at 550 °C also resulted in delamination of upper sheet. The intermetallic compound (IMC) layer was observed at the interface after annealing of Bimetals. The higher the annealing temperature and time, the higher the thickness of continuous IMC layer. The maximum measured thickness of IMC layer averaged 13 µm. Energy dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD) analyses revealed that the interface layer is consisted of Al18Ti2Mg3 IMC. Microhardness at the interface increased dramatically up to 439 HV0.1 after annealing of Bimetal due to the presence of above-mentioned IMC.
Qudong Wang - One of the best experts on this subject based on the ideXlab platform.
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an investigation into interface formation and mechanical properties of aluminum copper Bimetal by squeeze casting
Materials & Design, 2016Co-Authors: Qudong Wang, Qigui Wang, Wenjiang DingAbstract:Abstract Aluminum–copper Bimetal was prepared by compound casting liquid aluminum onto copper bars and solidifying under applied pressure. The effect of pouring temperature and applied pressure on microstructure and mechanical and electrical properties of the Bimetal was investigated. Bonding mechanism and mechanical and electrical behaviors of Bimetal were analyzed. Sound metallurgical bonding could be achieved by applying thermal spray zinc coating onto Cu inserts and carefully controlling the squeeze casting process. The results showed that interfacial reactions between liquid Al and solid Cu lead to the formation of transition zone, four possible layers, Al4Cu9 layer, Al2Cu layer, Al–Cu eutectic layer and Cu rich Al solid solution layer were identified in the transition zone. The thickness of each layer varies with the variation of pouring temperature and applied pressure. The formation of inherent defects and thickening of intermetallic compound promotes cracks propagation and weakens the bonding strength, hinders current flowing through and weakens the electrical property. The Bimetal made at pouring temperature of 700 °C gives the best mechanical and electrical properties.
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an investigation into aluminum aluminum Bimetal fabrication by squeeze casting
Materials & Design, 2015Co-Authors: Qudong Wang, Qigui Wang, Wenjiang DingAbstract:Abstract Aluminum–aluminum Bimetal were prepared by casting liquid A356 aluminum alloy onto 6101 aluminum extrusion bars and solidifying under applied pressure. The effect of surface treatment, pouring temperature and applied pressure on microstructure and mechanical properties of the Bimetal was investigated. The results showed that sound metallic bonding could be produced by electro-plating the solid 6101 aluminum alloy with a layer of zinc coating and carefully controlling the casting temperature. With the application of pressure during solidification process, the tensile strength exhibited more promising results than that made by gravity casting, for both A356 aluminum alloy matrix and Bimetal. However, with the increase of applied pressure, A356 aluminum alloy matrix and Bimetal showed different behaviors. For A356 aluminum alloy matrix, the tensile strength increased with the increase of applied pressure, for Bimetal it appeared to be independent on the magnitude of the applied pressure and the value remained steady. The fracture analysis indicated that during the tensile test of Bimetal, the crack initiation began with initial fracture of eutectic Si in the transition zone then extended in the transition zone. The tensile strength of the Bimetal fabricated by squeeze casting method was improved by about 10%, from 145 MPa to 155 MPa, as compared with that made by gravity casting. The process presented in this study provides a promising and effective approach to create a metallic bonding between an aluminum insert and various aluminum melts to develop advanced functional and structural materials.
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An investigation into aluminum–aluminum Bimetal fabrication by squeeze casting
Materials & Design, 2015Co-Authors: Qudong Wang, Qigui Wang, Wenjiang DingAbstract:Abstract Aluminum–aluminum Bimetal were prepared by casting liquid A356 aluminum alloy onto 6101 aluminum extrusion bars and solidifying under applied pressure. The effect of surface treatment, pouring temperature and applied pressure on microstructure and mechanical properties of the Bimetal was investigated. The results showed that sound metallic bonding could be produced by electro-plating the solid 6101 aluminum alloy with a layer of zinc coating and carefully controlling the casting temperature. With the application of pressure during solidification process, the tensile strength exhibited more promising results than that made by gravity casting, for both A356 aluminum alloy matrix and Bimetal. However, with the increase of applied pressure, A356 aluminum alloy matrix and Bimetal showed different behaviors. For A356 aluminum alloy matrix, the tensile strength increased with the increase of applied pressure, for Bimetal it appeared to be independent on the magnitude of the applied pressure and the value remained steady. The fracture analysis indicated that during the tensile test of Bimetal, the crack initiation began with initial fracture of eutectic Si in the transition zone then extended in the transition zone. The tensile strength of the Bimetal fabricated by squeeze casting method was improved by about 10%, from 145 MPa to 155 MPa, as compared with that made by gravity casting. The process presented in this study provides a promising and effective approach to create a metallic bonding between an aluminum insert and various aluminum melts to develop advanced functional and structural materials.
Jianwei Lu - One of the best experts on this subject based on the ideXlab platform.
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synthesis and use of Bimetals and Bimetal oxides in contaminants removal from water a review
RSC Advances, 2015Co-Authors: Fenglian Fu, Zihang Cheng, Jianwei LuAbstract:Water pollution aggravates water scarcity by contaminating large volumes of available water. There has been increasing interest in the use of Bimetallic particles and Bimetallic oxides for the removal of contaminants in water. This paper reviews the recent advances in the development of Bimetals and Bimetal oxides, and application in the treatment of environmental contaminants. 183 published studies (1999–2015) are reviewed in this paper. The synthesis methods of Bimetals including chemical methods, physical methods, and biosynthesis methods and the synthesis of Bimetal oxides including hydrothermal, impregnation, sol–gel, spray pyrolysis, and precipitation methods are summarized. Then the application of Bimetals and Bimetal oxides to remove different environmental contaminants in water including chlorinated organic compounds, heavy metal, arsenic and selenium, nitro compounds and azo dyes, anions and oxyanions are reviewed. The review focuses on experimental conditions, removal efficiency of contaminants, and reaction mechanism in the application of Bimetals and Bimetal oxides. Compared with monometals, Bimetals have high catalytic or removal ability for contaminants. The synthesis and application of Bimetals and Bimetal oxides is remarked on.
Petr Nesvadba - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Annealing on the Properties of AW5754 Aluminum Alloy-AZ31B Magnesium Alloy Explosively Welded Bimetals
Journal of Materials Engineering and Performance, 2019Co-Authors: Miroslav Sahul, Ľubomír Čaplovič, Petr Nesvadba, Jan Lokaj, Barbara OdokienováAbstract:Explosive welding of AW5754 aluminum alloy to AZ31B magnesium alloy was performed. AW5754 was proposed as a flyer plate. A parallel setup was used during explosive welding. The annealing of AW5754/AZ31B composite plate at 250, 300 and 350 °C for 2, 3, 4 and 5 h was performed after explosive welding. Bimetals were characterized by regular wavy interface. Annealing resulted in the creation of intermetallic compounds (IMCs). The increase in the thickness of IMC interfacial layer was observed with increasing of annealing temperature and time. IMC layer of highest thickness was recorded after annealing at 350 °C for 5 h and averaged 67 µm. EDS analysis showed that the interfacial layer close to AW5754 alloy was formed by Al_3Mg_2 IMC, and interfacial layer adjacent to the AZ31B alloy consisted of Mg_17Al_12 IMC. Bright particles were spread at the AW5754-Al_3Mg_2 IMC interface. Rise in the microhardness at the interface of produced Bimetal was associated with work hardening. Microhardness values increased to 218 HV0.025 after annealing process due to IMCs present at the interface. Decrease in microhardness in locations close to the IMC interfacial layer was found after heat treatment due to recrystallization. The Bimetal tensile strength reached 120 MPa. The annealing resulted in decrease in the Bimetal tensile strength.
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Influence of Annealing on the Properties of Explosively Welded Titanium Grade 1—AW7075 Aluminum Alloy Bimetals
Journal of Materials Engineering and Performance, 2018Co-Authors: Miroslav Sahul, L’ubomír Čaplovič, Jan Lokaj, Petr NesvadbaAbstract:Explosive welding of titanium Grade 1 to AW7075 aluminum alloy arranged in parallel setup was performed. The annealing of produced Bimetals at the temperatures of 450, 500 and 550 °C for times ranging from 20 to 100 h was carried out after explosive welding. The produced Bimetal was characteristic by its wavy interface typical for that bonding process. Increase in the microhardness at the interface was recorded due to work hardening. Delamination of titanium Grade 1 flyer sheet was firstly observed when annealing temperature of 500 °C for 40 h was carried out. Annealing at 550 °C also resulted in delamination of upper sheet. The intermetallic compound (IMC) layer was observed at the interface after annealing of Bimetals. The higher the annealing temperature and time, the higher the thickness of continuous IMC layer. The maximum measured thickness of IMC layer averaged 13 µm. Energy dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD) analyses revealed that the interface layer is consisted of Al18Ti2Mg3 IMC. Microhardness at the interface increased dramatically up to 439 HV0.1 after annealing of Bimetal due to the presence of above-mentioned IMC.
