“…During the explosive welding process, the severe plastic deformation made the metals flow and formed metal jets. Owing to the periodic oscillation of metal jets, the incoming metals of flyer plate and baseplate interacted, the liquid metal at the collision zone condensed rapidly, the cooling rate is not less than 10 5 K/s and the general solidification time is about 1.5–2.5 µs, to cause the higher internal stress near the joining interface [19,26]. Figure 5 (a) The KAM map of the Nb/316L joining interface.…”
Section: Resultsmentioning
confidence: 99%
“…The biggest advantage of the explosive welding technique is that it can realise the joining of dissimilar materials on a large scale in one step. In addition, by calculating and controlling the explosive welding parameters, it can effectively avoid the formation of intermetallic compounds to a certain extent, thus, improving the welding quality of dissimilar joints [18][19][20][21][22].…”
Niobium has a reputation for its superior superconducting, high strength and corrosion resistance at elevated temperatures. In this work, the explosive welding technique was successfully performed to join Nb/316L dissimilar metals. To reveal the phase constitution and texture distribution at the joining interface, the EBSD test was carried out. It was concluded that an irregular large wavy structure of fine crystal, sub-grains and twin structures was formed. In addition, the recrystallised structures, substructures, deformed structures and local internal stress at the joining interface were attributed to severe plastic deformation and rapid solidification of liquid metal. Furthermore, six different deformation textures and recrystallisation textures were confirmed at the joining interface due to severe plastic deformation and dynamic recrystallisation.
“…During the explosive welding process, the severe plastic deformation made the metals flow and formed metal jets. Owing to the periodic oscillation of metal jets, the incoming metals of flyer plate and baseplate interacted, the liquid metal at the collision zone condensed rapidly, the cooling rate is not less than 10 5 K/s and the general solidification time is about 1.5–2.5 µs, to cause the higher internal stress near the joining interface [19,26]. Figure 5 (a) The KAM map of the Nb/316L joining interface.…”
Section: Resultsmentioning
confidence: 99%
“…The biggest advantage of the explosive welding technique is that it can realise the joining of dissimilar materials on a large scale in one step. In addition, by calculating and controlling the explosive welding parameters, it can effectively avoid the formation of intermetallic compounds to a certain extent, thus, improving the welding quality of dissimilar joints [18][19][20][21][22].…”
Niobium has a reputation for its superior superconducting, high strength and corrosion resistance at elevated temperatures. In this work, the explosive welding technique was successfully performed to join Nb/316L dissimilar metals. To reveal the phase constitution and texture distribution at the joining interface, the EBSD test was carried out. It was concluded that an irregular large wavy structure of fine crystal, sub-grains and twin structures was formed. In addition, the recrystallised structures, substructures, deformed structures and local internal stress at the joining interface were attributed to severe plastic deformation and rapid solidification of liquid metal. Furthermore, six different deformation textures and recrystallisation textures were confirmed at the joining interface due to severe plastic deformation and dynamic recrystallisation.
“…The development of new materials and production processes that use unconventional energy sources is the result of scientific and technical-technological progress of human society. The application of explosion welding to obtain bimetallic and multi-layer [5][6][7][8][9] compositions of materials is gaining more and more importance. Therefore, this method itself as well as all the phenomena that occur during it are increasingly attracting the attention of both scientists and its users.…”
Explosive plating, or welding, is a process where part of the kinetic energy of the detonation of a certain amount of civil explosive material is used to accelerate the plate, which will form a welded joint upon an oblique impact on a stationary plate. The conditions that must be met to achieve a good weld are determined by welding criteria. Today, the most commonly used welding criteria are based on the speed of the collision point and the collision angle. In this paper a research is presented on explosion welding of two different steels and on quality of the obtained welded joint. Carbon steel and spring steel were welded using Amonex 4 explosive in different quantities. Basic characterization of the explosive was carried out: bulk density and detonation velocity were determined. Quality of the welded joint was inspected using the ultrasonic method. Possible intermetallic zones at the joint site created by the effect of increased temperature were examined by optical and scanning electron microscopy. Fracture toughness of the welded plates was determined, as well as hardness. The achieved experimental results were compared to theoretical predictions.
“…It has gradually become the mainstream method for preparing titanium/steel composites [5,6]. When preparing titanium/steel composites by hot rolling, the violent diffusion of Fe, C and Ti atoms leads to Fe 2 Ti, FeTi and TiC brittle compounds at the bonding interface [7,8]. Fe 2 Ti and FeTi are more harmful than TiC, and the coexistence of the three has a more detrimental effect on the bonding strength than when they are present alone [9].…”
Constructing different titanium/steel composite interface structures and stabilising the TiC layer at 950°C through structural modification, the coexistence of multiple brittle phases at the composite interface was reduced and discussed the formation mechanism. Through structure modulation, the organisation of the bonding interface near the Ti side transformed into α-Ti, and the bond strength significantly increased to 290 MPa. Break through the rolling temperature should be limited to below 850°C, and the rolling temperature increases to 950°C. The bonding interface is transformed from discontinuous TiC and aggregated Fe2Ti particles to a uniform and continuous TiC layer at 850 and 900°C. Achieving a regulated TiC layer thickness of 180–190 nm inhibited Fe2Ti and FeTi production.
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